/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/Problem02_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:33:12,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:33:12,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:33:12,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:33:12,944 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 22:33:12,970 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:33:12,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:33:12,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:33:12,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:33:12,972 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:33:12,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:33:12,972 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:33:12,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:33:12,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:33:12,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:33:12,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:33:12,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:33:12,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:33:12,974 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:33:12,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:33:12,974 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:33:12,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:33:12,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:33:12,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:33:12,975 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:33:12,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:33:12,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:33:12,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:33:12,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:33:12,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:33:12,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:33:12,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:33:12,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:33:12,976 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 22:33:13,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:33:13,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:33:13,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:33:13,242 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:33:13,242 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:33:13,243 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2019-11-06 22:33:13,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9b6e097/fc932f1d06934556bb64f35a050f81d4/FLAGa712293b9 [2019-11-06 22:33:13,893 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:33:13,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2019-11-06 22:33:13,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9b6e097/fc932f1d06934556bb64f35a050f81d4/FLAGa712293b9 [2019-11-06 22:33:14,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9b6e097/fc932f1d06934556bb64f35a050f81d4 [2019-11-06 22:33:14,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:33:14,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:33:14,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:33:14,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:33:14,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:33:14,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:14" (1/1) ... [2019-11-06 22:33:14,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22fb272e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14, skipping insertion in model container [2019-11-06 22:33:14,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:14" (1/1) ... [2019-11-06 22:33:14,183 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:33:14,234 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:33:14,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:33:14,718 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:33:14,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:33:14,860 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:33:14,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14 WrapperNode [2019-11-06 22:33:14,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:33:14,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:33:14,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:33:14,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:33:14,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2019-11-06 22:33:14,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2019-11-06 22:33:14,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2019-11-06 22:33:14,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2019-11-06 22:33:14,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2019-11-06 22:33:14,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2019-11-06 22:33:14,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2019-11-06 22:33:14,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:33:14,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:33:14,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:33:14,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:33:14,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (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 22:33:15,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:33:15,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:33:15,048 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:33:15,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:33:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:33:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:33:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:33:15,049 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:33:15,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:33:15,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:33:15,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:33:16,175 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:33:16,176 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:33:16,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:16 BoogieIcfgContainer [2019-11-06 22:33:16,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:33:16,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:33:16,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:33:16,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:33:16,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:33:14" (1/3) ... [2019-11-06 22:33:16,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cbbf03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:16, skipping insertion in model container [2019-11-06 22:33:16,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (2/3) ... [2019-11-06 22:33:16,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cbbf03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:16, skipping insertion in model container [2019-11-06 22:33:16,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:16" (3/3) ... [2019-11-06 22:33:16,195 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label09.c [2019-11-06 22:33:16,211 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:33:16,224 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:33:16,238 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:33:16,283 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:33:16,283 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:33:16,285 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:33:16,285 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:33:16,285 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:33:16,285 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:33:16,286 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:33:16,286 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:33:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:33:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 22:33:16,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:16,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:16,346 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:16,352 INFO L82 PathProgramCache]: Analyzing trace with hash -976875031, now seen corresponding path program 1 times [2019-11-06 22:33:16,361 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:16,361 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922159699] [2019-11-06 22:33:16,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:16,803 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 22:33:16,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922159699] [2019-11-06 22:33:16,805 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:16,806 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:33:16,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513545610] [2019-11-06 22:33:16,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:33:16,819 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:16,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:33:16,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:33:16,836 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:33:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:17,719 INFO L93 Difference]: Finished difference Result 624 states and 1069 transitions. [2019-11-06 22:33:17,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:33:17,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2019-11-06 22:33:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:17,738 INFO L225 Difference]: With dead ends: 624 [2019-11-06 22:33:17,738 INFO L226 Difference]: Without dead ends: 326 [2019-11-06 22:33:17,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:33:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-11-06 22:33:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 321. [2019-11-06 22:33:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:33:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 467 transitions. [2019-11-06 22:33:17,860 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 467 transitions. Word has length 127 [2019-11-06 22:33:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:17,863 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 467 transitions. [2019-11-06 22:33:17,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:33:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 467 transitions. [2019-11-06 22:33:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 22:33:17,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:17,876 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:33:17,876 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:17,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1101712018, now seen corresponding path program 1 times [2019-11-06 22:33:17,877 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:17,878 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507921209] [2019-11-06 22:33:17,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:18,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507921209] [2019-11-06 22:33:18,198 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:18,198 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:33:18,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266542568] [2019-11-06 22:33:18,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:33:18,200 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:18,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:33:18,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:18,201 INFO L87 Difference]: Start difference. First operand 321 states and 467 transitions. Second operand 5 states. [2019-11-06 22:33:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:18,851 INFO L93 Difference]: Finished difference Result 723 states and 1093 transitions. [2019-11-06 22:33:18,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:33:18,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2019-11-06 22:33:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:18,861 INFO L225 Difference]: With dead ends: 723 [2019-11-06 22:33:18,861 INFO L226 Difference]: Without dead ends: 321 [2019-11-06 22:33:18,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-11-06 22:33:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2019-11-06 22:33:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:33:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 463 transitions. [2019-11-06 22:33:18,878 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 463 transitions. Word has length 135 [2019-11-06 22:33:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:18,879 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 463 transitions. [2019-11-06 22:33:18,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:33:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 463 transitions. [2019-11-06 22:33:18,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 22:33:18,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:18,881 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:33:18,881 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1390328654, now seen corresponding path program 1 times [2019-11-06 22:33:18,882 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:18,882 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103463637] [2019-11-06 22:33:18,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:19,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103463637] [2019-11-06 22:33:19,065 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:19,065 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:33:19,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959078387] [2019-11-06 22:33:19,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:33:19,066 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:19,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:33:19,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:33:19,067 INFO L87 Difference]: Start difference. First operand 321 states and 463 transitions. Second operand 6 states. [2019-11-06 22:33:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:20,052 INFO L93 Difference]: Finished difference Result 979 states and 1481 transitions. [2019-11-06 22:33:20,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:33:20,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-11-06 22:33:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:20,062 INFO L225 Difference]: With dead ends: 979 [2019-11-06 22:33:20,063 INFO L226 Difference]: Without dead ends: 664 [2019-11-06 22:33:20,068 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 22:33:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-11-06 22:33:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 632. [2019-11-06 22:33:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2019-11-06 22:33:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 895 transitions. [2019-11-06 22:33:20,131 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 895 transitions. Word has length 137 [2019-11-06 22:33:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:20,138 INFO L462 AbstractCegarLoop]: Abstraction has 632 states and 895 transitions. [2019-11-06 22:33:20,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:33:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 895 transitions. [2019-11-06 22:33:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 22:33:20,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:20,142 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:33:20,143 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:20,143 INFO L82 PathProgramCache]: Analyzing trace with hash 13692256, now seen corresponding path program 1 times [2019-11-06 22:33:20,144 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:20,144 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058230611] [2019-11-06 22:33:20,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:20,451 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058230611] [2019-11-06 22:33:20,451 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:20,451 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:33:20,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668245978] [2019-11-06 22:33:20,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:33:20,452 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:20,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:33:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:33:20,453 INFO L87 Difference]: Start difference. First operand 632 states and 895 transitions. Second operand 7 states. [2019-11-06 22:33:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:22,009 INFO L93 Difference]: Finished difference Result 2079 states and 3063 transitions. [2019-11-06 22:33:22,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:33:22,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2019-11-06 22:33:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:22,018 INFO L225 Difference]: With dead ends: 2079 [2019-11-06 22:33:22,019 INFO L226 Difference]: Without dead ends: 1453 [2019-11-06 22:33:22,021 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 22:33:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2019-11-06 22:33:22,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1365. [2019-11-06 22:33:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2019-11-06 22:33:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1940 transitions. [2019-11-06 22:33:22,067 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1940 transitions. Word has length 140 [2019-11-06 22:33:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:22,067 INFO L462 AbstractCegarLoop]: Abstraction has 1365 states and 1940 transitions. [2019-11-06 22:33:22,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:33:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1940 transitions. [2019-11-06 22:33:22,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 22:33:22,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:22,074 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:33:22,074 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:22,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1527973936, now seen corresponding path program 1 times [2019-11-06 22:33:22,075 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:22,075 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347067550] [2019-11-06 22:33:22,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:22,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347067550] [2019-11-06 22:33:22,187 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:22,187 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:33:22,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276338691] [2019-11-06 22:33:22,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:33:22,188 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:22,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:33:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:33:22,189 INFO L87 Difference]: Start difference. First operand 1365 states and 1940 transitions. Second operand 6 states. [2019-11-06 22:33:22,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:22,944 INFO L93 Difference]: Finished difference Result 3355 states and 4901 transitions. [2019-11-06 22:33:22,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:33:22,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2019-11-06 22:33:22,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:22,957 INFO L225 Difference]: With dead ends: 3355 [2019-11-06 22:33:22,957 INFO L226 Difference]: Without dead ends: 1996 [2019-11-06 22:33:22,961 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 22:33:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2019-11-06 22:33:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1968. [2019-11-06 22:33:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1968 states. [2019-11-06 22:33:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2752 transitions. [2019-11-06 22:33:23,027 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2752 transitions. Word has length 148 [2019-11-06 22:33:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:23,027 INFO L462 AbstractCegarLoop]: Abstraction has 1968 states and 2752 transitions. [2019-11-06 22:33:23,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:33:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2752 transitions. [2019-11-06 22:33:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:33:23,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:23,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:23,034 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:23,035 INFO L82 PathProgramCache]: Analyzing trace with hash -234431911, now seen corresponding path program 1 times [2019-11-06 22:33:23,035 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:23,035 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352226772] [2019-11-06 22:33:23,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:23,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352226772] [2019-11-06 22:33:23,266 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:23,266 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:33:23,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463303646] [2019-11-06 22:33:23,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:33:23,267 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:33:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:23,268 INFO L87 Difference]: Start difference. First operand 1968 states and 2752 transitions. Second operand 5 states. [2019-11-06 22:33:23,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:23,814 INFO L93 Difference]: Finished difference Result 4016 states and 5676 transitions. [2019-11-06 22:33:23,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:33:23,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-11-06 22:33:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:23,826 INFO L225 Difference]: With dead ends: 4016 [2019-11-06 22:33:23,826 INFO L226 Difference]: Without dead ends: 1968 [2019-11-06 22:33:23,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:33:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2019-11-06 22:33:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1968. [2019-11-06 22:33:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1968 states. [2019-11-06 22:33:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2702 transitions. [2019-11-06 22:33:23,883 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2702 transitions. Word has length 153 [2019-11-06 22:33:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:23,884 INFO L462 AbstractCegarLoop]: Abstraction has 1968 states and 2702 transitions. [2019-11-06 22:33:23,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:33:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2702 transitions. [2019-11-06 22:33:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 22:33:23,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:23,890 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:33:23,890 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1639097634, now seen corresponding path program 1 times [2019-11-06 22:33:23,891 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:23,891 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214066430] [2019-11-06 22:33:23,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:33:23,995 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214066430] [2019-11-06 22:33:23,995 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049238412] [2019-11-06 22:33:23,995 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 22:33:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:24,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:33:24,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:33:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:24,238 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:33:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:24,403 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1118873549] [2019-11-06 22:33:24,412 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 162 [2019-11-06 22:33:24,490 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:33:24,490 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)