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_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:03:57,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:03:57,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:03:58,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:03:58,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:03:58,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:03:58,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:03:58,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:03:58,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:03:58,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:03:58,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:03:58,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:03:58,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:03:58,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:03:58,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:03:58,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:03:58,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:03:58,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:03:58,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:03:58,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:03:58,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:03:58,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:03:58,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:03:58,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:03:58,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:03:58,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:03:58,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:03:58,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:03:58,062 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 [2019-10-15 00:03:58,093 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:03:58,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:03:58,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:03:58,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:03:58,097 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:03:58,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:03:58,098 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:03:58,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:03:58,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:03:58,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:03:58,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:03:58,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:03:58,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:03:58,100 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:03:58,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:03:58,101 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:03:58,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:03:58,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:03:58,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:03:58,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:03:58,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:03:58,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:58,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:03:58,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:03:58,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:03:58,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:03:58,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:03:58,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:03:58,104 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 [2019-10-15 00:03:58,415 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:03:58,437 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:03:58,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:03:58,443 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:03:58,443 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:03:58,444 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label44.c [2019-10-15 00:03:58,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861138aeb/341a5b3a3d0b4aeba1302548d48b7739/FLAG3c7b77a2d [2019-10-15 00:03:59,149 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:03:59,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label44.c [2019-10-15 00:03:59,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861138aeb/341a5b3a3d0b4aeba1302548d48b7739/FLAG3c7b77a2d [2019-10-15 00:03:59,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/861138aeb/341a5b3a3d0b4aeba1302548d48b7739 [2019-10-15 00:03:59,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:03:59,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:03:59,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:59,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:03:59,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:03:59,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:59" (1/1) ... [2019-10-15 00:03:59,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2347579a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:59, skipping insertion in model container [2019-10-15 00:03:59,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:59" (1/1) ... [2019-10-15 00:03:59,400 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:03:59,464 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:04:00,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:00,155 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:04:00,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:00,395 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:04:00,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00 WrapperNode [2019-10-15 00:04:00,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:00,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:04:00,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:04:00,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:04:00,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00" (1/1) ... [2019-10-15 00:04:00,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00" (1/1) ... [2019-10-15 00:04:00,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00" (1/1) ... [2019-10-15 00:04:00,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00" (1/1) ... [2019-10-15 00:04:00,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00" (1/1) ... [2019-10-15 00:04:00,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00" (1/1) ... [2019-10-15 00:04:00,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00" (1/1) ... [2019-10-15 00:04:00,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:04:00,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:04:00,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:04:00,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:04:00,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00" (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 [2019-10-15 00:04:00,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:04:00,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:04:00,605 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:04:00,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:04:00,605 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:04:00,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:04:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:04:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:04:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:04:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:04:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:04:02,346 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:04:02,347 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:04:02,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:02 BoogieIcfgContainer [2019-10-15 00:04:02,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:04:02,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:04:02,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:04:02,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:04:02,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:59" (1/3) ... [2019-10-15 00:04:02,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4162fb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:02, skipping insertion in model container [2019-10-15 00:04:02,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:00" (2/3) ... [2019-10-15 00:04:02,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4162fb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:02, skipping insertion in model container [2019-10-15 00:04:02,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:02" (3/3) ... [2019-10-15 00:04:02,370 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label44.c [2019-10-15 00:04:02,387 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:02,399 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:02,412 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:02,441 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:02,441 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:02,441 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:02,441 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:02,441 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:02,442 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:02,442 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:02,442 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:04:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 00:04:02,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:02,500 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] [2019-10-15 00:04:02,502 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:02,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1276641867, now seen corresponding path program 1 times [2019-10-15 00:04:02,524 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:02,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714571350] [2019-10-15 00:04:02,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:02,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:02,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:02,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714571350] [2019-10-15 00:04:02,819 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:02,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:02,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312792910] [2019-10-15 00:04:02,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:02,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:02,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:02,844 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:04:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:05,180 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-10-15 00:04:05,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:05,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-15 00:04:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:05,209 INFO L225 Difference]: With dead ends: 975 [2019-10-15 00:04:05,209 INFO L226 Difference]: Without dead ends: 616 [2019-10-15 00:04:05,218 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 [2019-10-15 00:04:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-15 00:04:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-10-15 00:04:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-10-15 00:04:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-10-15 00:04:05,317 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 32 [2019-10-15 00:04:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:05,317 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-10-15 00:04:05,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-10-15 00:04:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 00:04:05,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:05,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:05,330 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:05,332 INFO L82 PathProgramCache]: Analyzing trace with hash 201462154, now seen corresponding path program 1 times [2019-10-15 00:04:05,332 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:05,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217294507] [2019-10-15 00:04:05,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:05,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:05,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:05,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217294507] [2019-10-15 00:04:05,598 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:05,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:05,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796273374] [2019-10-15 00:04:05,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:05,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:05,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:05,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:05,602 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-10-15 00:04:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:07,230 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-10-15 00:04:07,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:07,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-15 00:04:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:07,237 INFO L225 Difference]: With dead ends: 1241 [2019-10-15 00:04:07,237 INFO L226 Difference]: Without dead ends: 825 [2019-10-15 00:04:07,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:04:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-10-15 00:04:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-10-15 00:04:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-15 00:04:07,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-10-15 00:04:07,297 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 104 [2019-10-15 00:04:07,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:07,298 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-10-15 00:04:07,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:07,298 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-10-15 00:04:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 00:04:07,301 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:07,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:07,301 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1596761827, now seen corresponding path program 1 times [2019-10-15 00:04:07,302 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:07,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829338217] [2019-10-15 00:04:07,303 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:07,303 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:07,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:07,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829338217] [2019-10-15 00:04:07,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559360206] [2019-10-15 00:04:07,501 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 [2019-10-15 00:04:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:07,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:04:07,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:07,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:07,766 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:07,979 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-10-15 00:04:08,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:08,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:08,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:08,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:08,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:08,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:08,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:08,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:08,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:08,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:08,192 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:04:08,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-15 00:04:08,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133925170] [2019-10-15 00:04:08,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 00:04:08,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:08,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 00:04:08,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:04:08,195 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 7 states. [2019-10-15 00:04:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:10,861 INFO L93 Difference]: Finished difference Result 2829 states and 4164 transitions. [2019-10-15 00:04:10,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 00:04:10,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 105 [2019-10-15 00:04:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:10,887 INFO L225 Difference]: With dead ends: 2829 [2019-10-15 00:04:10,888 INFO L226 Difference]: Without dead ends: 2021 [2019-10-15 00:04:10,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-10-15 00:04:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2019-10-15 00:04:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1992. [2019-10-15 00:04:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2019-10-15 00:04:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2629 transitions. [2019-10-15 00:04:11,016 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2629 transitions. Word has length 105 [2019-10-15 00:04:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:11,017 INFO L462 AbstractCegarLoop]: Abstraction has 1992 states and 2629 transitions. [2019-10-15 00:04:11,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 00:04:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2629 transitions. [2019-10-15 00:04:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 00:04:11,030 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:11,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:11,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:11,238 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:11,238 INFO L82 PathProgramCache]: Analyzing trace with hash -741406572, now seen corresponding path program 1 times [2019-10-15 00:04:11,239 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:11,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644387808] [2019-10-15 00:04:11,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:11,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:11,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:11,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644387808] [2019-10-15 00:04:11,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405099832] [2019-10-15 00:04:11,564 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 [2019-10-15 00:04:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:11,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:04:11,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:11,731 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:11,782 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:04:11,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-15 00:04:11,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015939109] [2019-10-15 00:04:11,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:11,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:11,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:11,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:04:11,785 INFO L87 Difference]: Start difference. First operand 1992 states and 2629 transitions. Second operand 4 states. [2019-10-15 00:04:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:13,469 INFO L93 Difference]: Finished difference Result 5541 states and 7566 transitions. [2019-10-15 00:04:13,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:13,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-15 00:04:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:13,498 INFO L225 Difference]: With dead ends: 5541 [2019-10-15 00:04:13,498 INFO L226 Difference]: Without dead ends: 3555 [2019-10-15 00:04:13,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:04:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2019-10-15 00:04:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2965. [2019-10-15 00:04:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2019-10-15 00:04:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3974 transitions. [2019-10-15 00:04:13,611 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3974 transitions. Word has length 163 [2019-10-15 00:04:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:13,613 INFO L462 AbstractCegarLoop]: Abstraction has 2965 states and 3974 transitions. [2019-10-15 00:04:13,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3974 transitions. [2019-10-15 00:04:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-15 00:04:13,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:13,619 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:13,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:13,828 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 967076156, now seen corresponding path program 1 times [2019-10-15 00:04:13,830 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:13,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772223950] [2019-10-15 00:04:13,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:13,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:13,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:04:14,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772223950] [2019-10-15 00:04:14,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228696308] [2019-10-15 00:04:14,249 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 [2019-10-15 00:04:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:14,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 00:04:14,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:14,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:14,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:14,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:04:16,521 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:16,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:16,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:16,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:16,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:16,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1713225740] [2019-10-15 00:04:16,697 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 233 [2019-10-15 00:04:16,769 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:04:16,769 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)