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/Problem11_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:04:11,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:04:11,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:04:11,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:04:11,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:04:11,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:04:11,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:04:11,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:04:11,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:04:11,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:04:11,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:04:11,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:04:11,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:04:11,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:04:11,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:04:11,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:04:11,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:04:11,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:04:11,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:04:11,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:04:11,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:04:11,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:04:11,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:04:11,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:04:11,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:04:11,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:04:11,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:04:11,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:04:11,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:04:11,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:04:11,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:04:11,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:04:11,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:04:11,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:04:11,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:04:11,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:04:11,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:04:11,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:04:11,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:04:11,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:04:11,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:04:11,112 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 20:04:11,133 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:04:11,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:04:11,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:04:11,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:04:11,140 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:04:11,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:04:11,140 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:04:11,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:04:11,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:04:11,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:04:11,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:04:11,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:04:11,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:04:11,141 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:04:11,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:04:11,142 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:04:11,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:04:11,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:04:11,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:04:11,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:04:11,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:04:11,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:04:11,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:04:11,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:04:11,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:04:11,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:04:11,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:04:11,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:04:11,149 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 20:04:11,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:04:11,434 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:04:11,437 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:04:11,439 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:04:11,439 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:04:11,440 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label17.c [2019-10-13 20:04:11,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e1c59864/af2c1e7703a7407d9303df544450eb31/FLAG3615e2f7b [2019-10-13 20:04:12,129 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:04:12,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label17.c [2019-10-13 20:04:12,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e1c59864/af2c1e7703a7407d9303df544450eb31/FLAG3615e2f7b [2019-10-13 20:04:12,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e1c59864/af2c1e7703a7407d9303df544450eb31 [2019-10-13 20:04:12,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:04:12,350 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:04:12,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:12,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:04:12,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:04:12,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:12" (1/1) ... [2019-10-13 20:04:12,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154386d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:12, skipping insertion in model container [2019-10-13 20:04:12,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:12" (1/1) ... [2019-10-13 20:04:12,368 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:04:12,430 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:04:13,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:13,229 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:04:13,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:13,443 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:04:13,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13 WrapperNode [2019-10-13 20:04:13,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:13,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:04:13,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:04:13,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:04:13,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13" (1/1) ... [2019-10-13 20:04:13,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13" (1/1) ... [2019-10-13 20:04:13,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13" (1/1) ... [2019-10-13 20:04:13,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13" (1/1) ... [2019-10-13 20:04:13,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13" (1/1) ... [2019-10-13 20:04:13,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13" (1/1) ... [2019-10-13 20:04:13,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13" (1/1) ... [2019-10-13 20:04:13,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:04:13,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:04:13,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:04:13,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:04:13,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13" (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 20:04:13,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:04:13,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:04:13,715 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:04:13,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:04:13,715 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:04:13,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:04:13,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:04:13,716 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:04:13,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:04:13,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:04:13,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:04:15,536 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:04:15,537 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:04:15,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:15 BoogieIcfgContainer [2019-10-13 20:04:15,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:04:15,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:04:15,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:04:15,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:04:15,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:12" (1/3) ... [2019-10-13 20:04:15,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5594181a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:15, skipping insertion in model container [2019-10-13 20:04:15,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:13" (2/3) ... [2019-10-13 20:04:15,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5594181a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:15, skipping insertion in model container [2019-10-13 20:04:15,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:15" (3/3) ... [2019-10-13 20:04:15,549 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label17.c [2019-10-13 20:04:15,560 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:04:15,571 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:04:15,584 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:04:15,625 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:04:15,625 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:04:15,625 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:04:15,625 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:04:15,625 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:04:15,626 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:04:15,626 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:04:15,626 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:04:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:04:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 20:04:15,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:15,676 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] [2019-10-13 20:04:15,677 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:15,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2013037499, now seen corresponding path program 1 times [2019-10-13 20:04:15,696 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:15,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61273427] [2019-10-13 20:04:15,696 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:15,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:15,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:16,145 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 20:04:16,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61273427] [2019-10-13 20:04:16,147 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:16,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:04:16,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100869173] [2019-10-13 20:04:16,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:16,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:04:16,177 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-13 20:04:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:17,651 INFO L93 Difference]: Finished difference Result 787 states and 1379 transitions. [2019-10-13 20:04:17,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:17,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2019-10-13 20:04:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:17,671 INFO L225 Difference]: With dead ends: 787 [2019-10-13 20:04:17,671 INFO L226 Difference]: Without dead ends: 433 [2019-10-13 20:04:17,679 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 20:04:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2019-10-13 20:04:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 426. [2019-10-13 20:04:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-13 20:04:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 678 transitions. [2019-10-13 20:04:17,762 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 678 transitions. Word has length 44 [2019-10-13 20:04:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:17,762 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 678 transitions. [2019-10-13 20:04:17,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 678 transitions. [2019-10-13 20:04:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 20:04:17,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:17,769 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:17,769 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:17,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:17,770 INFO L82 PathProgramCache]: Analyzing trace with hash -697152023, now seen corresponding path program 1 times [2019-10-13 20:04:17,770 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:17,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430436456] [2019-10-13 20:04:17,771 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:17,771 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:17,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:17,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430436456] [2019-10-13 20:04:17,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:17,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:04:17,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742385919] [2019-10-13 20:04:17,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:04:17,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:17,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:04:17,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:04:17,918 INFO L87 Difference]: Start difference. First operand 426 states and 678 transitions. Second operand 5 states. [2019-10-13 20:04:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:19,595 INFO L93 Difference]: Finished difference Result 1259 states and 2034 transitions. [2019-10-13 20:04:19,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:04:19,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-10-13 20:04:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:19,606 INFO L225 Difference]: With dead ends: 1259 [2019-10-13 20:04:19,607 INFO L226 Difference]: Without dead ends: 839 [2019-10-13 20:04:19,609 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 20:04:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-10-13 20:04:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 627. [2019-10-13 20:04:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-10-13 20:04:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 934 transitions. [2019-10-13 20:04:19,655 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 934 transitions. Word has length 119 [2019-10-13 20:04:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:19,655 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 934 transitions. [2019-10-13 20:04:19,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:04:19,656 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 934 transitions. [2019-10-13 20:04:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 20:04:19,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:19,662 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:19,662 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:19,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:19,663 INFO L82 PathProgramCache]: Analyzing trace with hash 716839870, now seen corresponding path program 1 times [2019-10-13 20:04:19,663 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:19,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944804454] [2019-10-13 20:04:19,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:19,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:19,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:19,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944804454] [2019-10-13 20:04:19,832 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:19,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:04:19,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877354365] [2019-10-13 20:04:19,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:04:19,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:19,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:04:19,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:04:19,835 INFO L87 Difference]: Start difference. First operand 627 states and 934 transitions. Second operand 5 states. [2019-10-13 20:04:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:21,561 INFO L93 Difference]: Finished difference Result 1872 states and 2846 transitions. [2019-10-13 20:04:21,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:04:21,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-13 20:04:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:21,571 INFO L225 Difference]: With dead ends: 1872 [2019-10-13 20:04:21,571 INFO L226 Difference]: Without dead ends: 1251 [2019-10-13 20:04:21,573 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 20:04:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-13 20:04:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1032. [2019-10-13 20:04:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-10-13 20:04:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1433 transitions. [2019-10-13 20:04:21,620 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1433 transitions. Word has length 130 [2019-10-13 20:04:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:21,629 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1433 transitions. [2019-10-13 20:04:21,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:04:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1433 transitions. [2019-10-13 20:04:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 20:04:21,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:21,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:21,636 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:21,637 INFO L82 PathProgramCache]: Analyzing trace with hash -523045564, now seen corresponding path program 1 times [2019-10-13 20:04:21,637 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:21,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188624945] [2019-10-13 20:04:21,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:21,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:21,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:21,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188624945] [2019-10-13 20:04:21,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425093218] [2019-10-13 20:04:21,934 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 20:04:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:22,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:04:22,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:22,143 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:22,214 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:04:22,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-13 20:04:22,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604131393] [2019-10-13 20:04:22,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:22,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:22,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:22,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:04:22,216 INFO L87 Difference]: Start difference. First operand 1032 states and 1433 transitions. Second operand 3 states. [2019-10-13 20:04:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:23,328 INFO L93 Difference]: Finished difference Result 2662 states and 3820 transitions. [2019-10-13 20:04:23,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:23,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2019-10-13 20:04:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:23,338 INFO L225 Difference]: With dead ends: 2662 [2019-10-13 20:04:23,338 INFO L226 Difference]: Without dead ends: 1636 [2019-10-13 20:04:23,341 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:04:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2019-10-13 20:04:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1629. [2019-10-13 20:04:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2019-10-13 20:04:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2257 transitions. [2019-10-13 20:04:23,391 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2257 transitions. Word has length 175 [2019-10-13 20:04:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:23,392 INFO L462 AbstractCegarLoop]: Abstraction has 1629 states and 2257 transitions. [2019-10-13 20:04:23,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2257 transitions. [2019-10-13 20:04:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-13 20:04:23,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:23,397 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, 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] [2019-10-13 20:04:23,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:23,609 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:23,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1334961658, now seen corresponding path program 1 times [2019-10-13 20:04:23,610 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:23,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377592398] [2019-10-13 20:04:23,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:23,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:23,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 74 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:04:23,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377592398] [2019-10-13 20:04:23,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480251212] [2019-10-13 20:04:23,869 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 20:04:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:23,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:04:23,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 20:04:24,121 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 74 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:04:24,244 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:04:24,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:04:24,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407974453] [2019-10-13 20:04:24,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:04:24,246 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:24,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:04:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:04:24,247 INFO L87 Difference]: Start difference. First operand 1629 states and 2257 transitions. Second operand 5 states. [2019-10-13 20:04:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:25,754 INFO L93 Difference]: Finished difference Result 4500 states and 6394 transitions. [2019-10-13 20:04:25,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:04:25,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2019-10-13 20:04:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:25,770 INFO L225 Difference]: With dead ends: 4500 [2019-10-13 20:04:25,771 INFO L226 Difference]: Without dead ends: 2877 [2019-10-13 20:04:25,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:04:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2019-10-13 20:04:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2825. [2019-10-13 20:04:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2019-10-13 20:04:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3849 transitions. [2019-10-13 20:04:25,857 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3849 transitions. Word has length 199 [2019-10-13 20:04:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:25,858 INFO L462 AbstractCegarLoop]: Abstraction has 2825 states and 3849 transitions. [2019-10-13 20:04:25,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:04:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3849 transitions. [2019-10-13 20:04:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-13 20:04:25,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:25,863 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, 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] [2019-10-13 20:04:26,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:26,068 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1124795769, now seen corresponding path program 1 times [2019-10-13 20:04:26,069 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:26,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386878796] [2019-10-13 20:04:26,070 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:26,070 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:26,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:26,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386878796] [2019-10-13 20:04:26,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513249204] [2019-10-13 20:04:26,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:26,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:04:26,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:26,348 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:26,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [215844868] [2019-10-13 20:04:26,486 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 201 [2019-10-13 20:04:26,541 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:04:26,543 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)