/usr/bin/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/Problem10_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:42:10,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:42:10,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:42:10,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:42:10,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:42:10,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:42:10,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:42:10,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:42:10,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:42:10,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:42:10,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:42:10,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:42:10,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:42:10,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:42:10,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:42:10,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:42:10,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:42:10,293 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 [2019-11-06 22:42:10,307 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:42:10,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:42:10,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:42:10,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:42:10,309 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:42:10,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:42:10,309 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:42:10,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:42:10,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:42:10,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:42:10,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:42:10,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:42:10,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:42:10,311 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:42:10,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:42:10,311 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:42:10,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:42:10,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:42:10,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:42:10,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:42:10,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:42:10,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:42:10,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:42:10,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:42:10,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:42:10,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:42:10,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:42:10,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:42:10,314 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 [2019-11-06 22:42:10,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:42:10,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:42:10,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:42:10,614 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:42:10,615 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:42:10,615 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label22.c [2019-11-06 22:42:10,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfee54bf/0826c34c95524ceda266e4fd0ea2ebf1/FLAGe8db0beeb [2019-11-06 22:42:11,206 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:42:11,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label22.c [2019-11-06 22:42:11,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfee54bf/0826c34c95524ceda266e4fd0ea2ebf1/FLAGe8db0beeb [2019-11-06 22:42:11,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfee54bf/0826c34c95524ceda266e4fd0ea2ebf1 [2019-11-06 22:42:11,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:42:11,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:42:11,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:11,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:42:11,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:42:11,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:11" (1/1) ... [2019-11-06 22:42:11,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788c53ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:11, skipping insertion in model container [2019-11-06 22:42:11,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:11" (1/1) ... [2019-11-06 22:42:11,530 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:42:11,580 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:42:12,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:12,125 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:42:12,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:12,272 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:42:12,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12 WrapperNode [2019-11-06 22:42:12,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:12,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:42:12,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:42:12,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:42:12,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12" (1/1) ... [2019-11-06 22:42:12,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12" (1/1) ... [2019-11-06 22:42:12,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12" (1/1) ... [2019-11-06 22:42:12,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12" (1/1) ... [2019-11-06 22:42:12,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12" (1/1) ... [2019-11-06 22:42:12,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12" (1/1) ... [2019-11-06 22:42:12,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12" (1/1) ... [2019-11-06 22:42:12,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:42:12,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:42:12,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:42:12,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:42:12,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12" (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 [2019-11-06 22:42:12,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:42:12,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:42:12,497 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:42:12,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:42:12,498 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:42:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:42:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:42:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:42:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:42:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:42:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:42:13,709 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:42:13,710 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:42:13,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:13 BoogieIcfgContainer [2019-11-06 22:42:13,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:42:13,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:42:13,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:42:13,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:42:13,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:11" (1/3) ... [2019-11-06 22:42:13,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e300dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:13, skipping insertion in model container [2019-11-06 22:42:13,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:12" (2/3) ... [2019-11-06 22:42:13,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e300dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:13, skipping insertion in model container [2019-11-06 22:42:13,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:13" (3/3) ... [2019-11-06 22:42:13,720 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label22.c [2019-11-06 22:42:13,730 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:42:13,739 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:42:13,750 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:42:13,792 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:42:13,793 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:42:13,793 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:42:13,793 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:42:13,793 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:42:13,793 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:42:13,794 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:42:13,794 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:42:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:42:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 22:42:13,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:13,843 INFO L410 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] [2019-11-06 22:42:13,845 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1257002150, now seen corresponding path program 1 times [2019-11-06 22:42:13,865 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:13,865 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41702808] [2019-11-06 22:42:13,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:14,218 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41702808] [2019-11-06 22:42:14,219 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:14,219 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:42:14,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011880876] [2019-11-06 22:42:14,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:42:14,230 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:14,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:42:14,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:42:14,251 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-11-06 22:42:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:15,715 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-11-06 22:42:15,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:42:15,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-06 22:42:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:15,736 INFO L225 Difference]: With dead ends: 733 [2019-11-06 22:42:15,736 INFO L226 Difference]: Without dead ends: 437 [2019-11-06 22:42:15,743 INFO L630 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 [2019-11-06 22:42:15,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-11-06 22:42:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2019-11-06 22:42:15,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-11-06 22:42:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2019-11-06 22:42:15,836 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 43 [2019-11-06 22:42:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:15,836 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2019-11-06 22:42:15,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:42:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2019-11-06 22:42:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-06 22:42:15,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:15,843 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:15,843 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:15,844 INFO L82 PathProgramCache]: Analyzing trace with hash 961573706, now seen corresponding path program 1 times [2019-11-06 22:42:15,844 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:15,844 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810802635] [2019-11-06 22:42:15,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:16,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810802635] [2019-11-06 22:42:16,136 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:16,136 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:42:16,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936237676] [2019-11-06 22:42:16,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:42:16,142 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:42:16,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:16,143 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand 6 states. [2019-11-06 22:42:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:17,239 INFO L93 Difference]: Finished difference Result 1329 states and 2004 transitions. [2019-11-06 22:42:17,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:17,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-11-06 22:42:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:17,249 INFO L225 Difference]: With dead ends: 1329 [2019-11-06 22:42:17,249 INFO L226 Difference]: Without dead ends: 898 [2019-11-06 22:42:17,251 INFO L630 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 [2019-11-06 22:42:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2019-11-06 22:42:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 880. [2019-11-06 22:42:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-11-06 22:42:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1284 transitions. [2019-11-06 22:42:17,313 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1284 transitions. Word has length 117 [2019-11-06 22:42:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:17,314 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1284 transitions. [2019-11-06 22:42:17,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:42:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1284 transitions. [2019-11-06 22:42:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 22:42:17,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:17,319 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:17,320 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:17,320 INFO L82 PathProgramCache]: Analyzing trace with hash -956258770, now seen corresponding path program 1 times [2019-11-06 22:42:17,320 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:17,321 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427527895] [2019-11-06 22:42:17,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:17,450 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427527895] [2019-11-06 22:42:17,450 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:17,450 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:42:17,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433614210] [2019-11-06 22:42:17,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:42:17,451 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:17,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:42:17,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:17,452 INFO L87 Difference]: Start difference. First operand 880 states and 1284 transitions. Second operand 6 states. [2019-11-06 22:42:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:18,350 INFO L93 Difference]: Finished difference Result 2219 states and 3338 transitions. [2019-11-06 22:42:18,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:18,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-11-06 22:42:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:18,360 INFO L225 Difference]: With dead ends: 2219 [2019-11-06 22:42:18,360 INFO L226 Difference]: Without dead ends: 1345 [2019-11-06 22:42:18,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:42:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2019-11-06 22:42:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1039. [2019-11-06 22:42:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-11-06 22:42:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1451 transitions. [2019-11-06 22:42:18,411 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1451 transitions. Word has length 119 [2019-11-06 22:42:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:18,411 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1451 transitions. [2019-11-06 22:42:18,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:42:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1451 transitions. [2019-11-06 22:42:18,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:42:18,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:18,417 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:18,417 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash -550888759, now seen corresponding path program 1 times [2019-11-06 22:42:18,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:18,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685977203] [2019-11-06 22:42:18,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:18,588 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685977203] [2019-11-06 22:42:18,588 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:18,588 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:42:18,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647796951] [2019-11-06 22:42:18,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:42:18,589 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:42:18,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:42:18,590 INFO L87 Difference]: Start difference. First operand 1039 states and 1451 transitions. Second operand 7 states. [2019-11-06 22:42:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:19,990 INFO L93 Difference]: Finished difference Result 2238 states and 3166 transitions. [2019-11-06 22:42:19,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:42:19,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2019-11-06 22:42:19,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:19,999 INFO L225 Difference]: With dead ends: 2238 [2019-11-06 22:42:19,999 INFO L226 Difference]: Without dead ends: 1039 [2019-11-06 22:42:20,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:42:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2019-11-06 22:42:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1039. [2019-11-06 22:42:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-11-06 22:42:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1444 transitions. [2019-11-06 22:42:20,042 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1444 transitions. Word has length 122 [2019-11-06 22:42:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:20,044 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1444 transitions. [2019-11-06 22:42:20,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:42:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1444 transitions. [2019-11-06 22:42:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:42:20,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:20,050 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:20,050 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash 772314102, now seen corresponding path program 1 times [2019-11-06 22:42:20,051 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:20,052 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926954262] [2019-11-06 22:42:20,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:42:20,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926954262] [2019-11-06 22:42:20,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377550951] [2019-11-06 22:42:20,190 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 [2019-11-06 22:42:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:20,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:42:20,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:42:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:20,404 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:42:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:20,469 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:42:20,471 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-06 22:42:20,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93848106] [2019-11-06 22:42:20,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:42:20,472 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:20,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:42:20,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:20,474 INFO L87 Difference]: Start difference. First operand 1039 states and 1444 transitions. Second operand 4 states. [2019-11-06 22:42:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:21,349 INFO L93 Difference]: Finished difference Result 1911 states and 2724 transitions. [2019-11-06 22:42:21,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:42:21,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-11-06 22:42:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:21,362 INFO L225 Difference]: With dead ends: 1911 [2019-11-06 22:42:21,362 INFO L226 Difference]: Without dead ends: 1909 [2019-11-06 22:42:21,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2019-11-06 22:42:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1333. [2019-11-06 22:42:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-11-06 22:42:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1879 transitions. [2019-11-06 22:42:21,427 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1879 transitions. Word has length 123 [2019-11-06 22:42:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:21,427 INFO L462 AbstractCegarLoop]: Abstraction has 1333 states and 1879 transitions. [2019-11-06 22:42:21,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:42:21,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1879 transitions. [2019-11-06 22:42:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 22:42:21,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:21,432 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:21,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:42:21,636 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:21,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1023272790, now seen corresponding path program 1 times [2019-11-06 22:42:21,637 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:21,637 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586612571] [2019-11-06 22:42:21,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:21,835 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586612571] [2019-11-06 22:42:21,836 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:21,836 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:42:21,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623409742] [2019-11-06 22:42:21,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:42:21,837 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:21,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:42:21,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:21,837 INFO L87 Difference]: Start difference. First operand 1333 states and 1879 transitions. Second operand 6 states. [2019-11-06 22:42:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:22,646 INFO L93 Difference]: Finished difference Result 3290 states and 4869 transitions. [2019-11-06 22:42:22,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:22,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-11-06 22:42:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:22,660 INFO L225 Difference]: With dead ends: 3290 [2019-11-06 22:42:22,660 INFO L226 Difference]: Without dead ends: 1963 [2019-11-06 22:42:22,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:42:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2019-11-06 22:42:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1780. [2019-11-06 22:42:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-11-06 22:42:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2400 transitions. [2019-11-06 22:42:22,747 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2400 transitions. Word has length 165 [2019-11-06 22:42:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:22,747 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 2400 transitions. [2019-11-06 22:42:22,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:42:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2400 transitions. [2019-11-06 22:42:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-11-06 22:42:22,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:22,756 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:22,757 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:22,757 INFO L82 PathProgramCache]: Analyzing trace with hash -95661739, now seen corresponding path program 1 times [2019-11-06 22:42:22,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:22,758 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821110641] [2019-11-06 22:42:22,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 172 proven. 74 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-06 22:42:23,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821110641] [2019-11-06 22:42:23,207 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943273273] [2019-11-06 22:42:23,208 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 [2019-11-06 22:42:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:23,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 22:42:23,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:42:23,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 5 terms [2019-11-06 22:42:23,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:42:23,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:23,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:23,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:23,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:23,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:23,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:23,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:23,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:23,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-06 22:42:23,801 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:42:23,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:42:24,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:42:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-06 22:42:24,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [678070090] [2019-11-06 22:42:24,439 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 353 [2019-11-06 22:42:24,487 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:42:24,487 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)