/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/Problem14_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:50:17,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:50:17,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:50:17,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:50:17,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:50:17,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:50:17,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:50:17,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:50:17,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:50:17,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:50:17,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:50:17,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:50:17,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:50:17,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:50:17,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:50:17,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:50:17,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:50:18,008 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 22:50:18,043 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:50:18,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:50:18,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:50:18,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:50:18,047 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:50:18,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:50:18,049 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:50:18,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:50:18,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:50:18,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:50:18,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:50:18,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:50:18,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:50:18,051 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:50:18,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:50:18,052 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:50:18,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:50:18,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:50:18,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:50:18,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:50:18,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:50:18,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:50:18,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:50:18,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:50:18,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:50:18,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:50:18,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:50:18,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:50:18,056 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 22:50:18,360 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:50:18,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:50:18,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:50:18,381 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:50:18,382 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:50:18,383 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-11-06 22:50:18,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abde2b516/d6ab7a8a95a6484285a27ca79a1a7826/FLAGd7a59c1b7 [2019-11-06 22:50:19,067 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:50:19,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-11-06 22:50:19,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abde2b516/d6ab7a8a95a6484285a27ca79a1a7826/FLAGd7a59c1b7 [2019-11-06 22:50:19,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abde2b516/d6ab7a8a95a6484285a27ca79a1a7826 [2019-11-06 22:50:19,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:50:19,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:50:19,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:50:19,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:50:19,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:50:19,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:19" (1/1) ... [2019-11-06 22:50:19,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1882f447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:19, skipping insertion in model container [2019-11-06 22:50:19,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:19" (1/1) ... [2019-11-06 22:50:19,303 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:50:19,354 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:50:19,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:50:19,835 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:50:20,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:50:20,179 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:50:20,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20 WrapperNode [2019-11-06 22:50:20,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:50:20,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:50:20,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:50:20,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:50:20,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2019-11-06 22:50:20,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2019-11-06 22:50:20,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2019-11-06 22:50:20,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2019-11-06 22:50:20,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2019-11-06 22:50:20,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2019-11-06 22:50:20,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (1/1) ... [2019-11-06 22:50:20,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:50:20,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:50:20,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:50:20,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:50:20,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (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 22:50:20,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:50:20,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:50:20,463 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:50:20,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:50:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:50:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:50:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:50:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:50:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:50:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:50:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:50:21,896 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:50:21,896 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:50:21,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:21 BoogieIcfgContainer [2019-11-06 22:50:21,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:50:21,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:50:21,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:50:21,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:50:21,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:50:19" (1/3) ... [2019-11-06 22:50:21,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef839e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:21, skipping insertion in model container [2019-11-06 22:50:21,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:20" (2/3) ... [2019-11-06 22:50:21,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef839e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:21, skipping insertion in model container [2019-11-06 22:50:21,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:21" (3/3) ... [2019-11-06 22:50:21,906 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label15.c [2019-11-06 22:50:21,916 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:50:21,926 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:50:21,938 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:50:21,965 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:50:21,966 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:50:21,966 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:50:21,966 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:50:21,966 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:50:21,967 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:50:21,967 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:50:21,967 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:50:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 22:50:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 22:50:22,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:22,002 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] [2019-11-06 22:50:22,003 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash -598870286, now seen corresponding path program 1 times [2019-11-06 22:50:22,019 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:22,020 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133402987] [2019-11-06 22:50:22,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:22,417 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 22:50:22,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133402987] [2019-11-06 22:50:22,419 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:22,420 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:50:22,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830491951] [2019-11-06 22:50:22,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:50:22,430 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:22,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:50:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:50:22,448 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-11-06 22:50:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:23,685 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-11-06 22:50:23,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:50:23,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-11-06 22:50:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:23,715 INFO L225 Difference]: With dead ends: 688 [2019-11-06 22:50:23,716 INFO L226 Difference]: Without dead ends: 372 [2019-11-06 22:50:23,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:50:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-11-06 22:50:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-11-06 22:50:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-11-06 22:50:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-11-06 22:50:23,806 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 71 [2019-11-06 22:50:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:23,807 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-11-06 22:50:23,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:50:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-11-06 22:50:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 22:50:23,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:23,815 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:50:23,815 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:23,816 INFO L82 PathProgramCache]: Analyzing trace with hash 96309737, now seen corresponding path program 1 times [2019-11-06 22:50:23,816 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:23,816 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112940463] [2019-11-06 22:50:23,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:24,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112940463] [2019-11-06 22:50:24,025 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:24,025 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:50:24,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698880067] [2019-11-06 22:50:24,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:50:24,028 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:24,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:50:24,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:50:24,028 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-11-06 22:50:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:25,252 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-11-06 22:50:25,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:50:25,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-11-06 22:50:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:25,258 INFO L225 Difference]: With dead ends: 1122 [2019-11-06 22:50:25,258 INFO L226 Difference]: Without dead ends: 756 [2019-11-06 22:50:25,260 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 22:50:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-11-06 22:50:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-11-06 22:50:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-11-06 22:50:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-11-06 22:50:25,320 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 140 [2019-11-06 22:50:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:25,321 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-11-06 22:50:25,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:50:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-11-06 22:50:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:50:25,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:25,334 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, 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] [2019-11-06 22:50:25,335 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:25,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1593048690, now seen corresponding path program 1 times [2019-11-06 22:50:25,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:25,336 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180351855] [2019-11-06 22:50:25,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:25,508 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180351855] [2019-11-06 22:50:25,509 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:25,509 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:50:25,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609220231] [2019-11-06 22:50:25,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:50:25,513 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:25,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:50:25,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:50:25,514 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-11-06 22:50:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:26,708 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-11-06 22:50:26,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:50:26,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-11-06 22:50:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:26,720 INFO L225 Difference]: With dead ends: 1904 [2019-11-06 22:50:26,720 INFO L226 Difference]: Without dead ends: 1158 [2019-11-06 22:50:26,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:50:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-11-06 22:50:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-11-06 22:50:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-11-06 22:50:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-11-06 22:50:26,805 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 141 [2019-11-06 22:50:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:26,806 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-11-06 22:50:26,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:50:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-11-06 22:50:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 22:50:26,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:26,809 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, 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] [2019-11-06 22:50:26,809 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash -552951950, now seen corresponding path program 1 times [2019-11-06 22:50:26,810 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:26,810 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863914914] [2019-11-06 22:50:26,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:26,932 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863914914] [2019-11-06 22:50:26,933 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:26,933 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:50:26,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157332737] [2019-11-06 22:50:26,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:50:26,934 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:26,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:50:26,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:50:26,935 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-11-06 22:50:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:28,306 INFO L93 Difference]: Finished difference Result 2880 states and 4162 transitions. [2019-11-06 22:50:28,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:50:28,309 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-11-06 22:50:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:28,318 INFO L225 Difference]: With dead ends: 2880 [2019-11-06 22:50:28,319 INFO L226 Difference]: Without dead ends: 1748 [2019-11-06 22:50:28,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:50:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2019-11-06 22:50:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1326. [2019-11-06 22:50:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2019-11-06 22:50:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1863 transitions. [2019-11-06 22:50:28,376 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1863 transitions. Word has length 143 [2019-11-06 22:50:28,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:28,377 INFO L462 AbstractCegarLoop]: Abstraction has 1326 states and 1863 transitions. [2019-11-06 22:50:28,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:50:28,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1863 transitions. [2019-11-06 22:50:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-11-06 22:50:28,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:28,381 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:50:28,381 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:28,382 INFO L82 PathProgramCache]: Analyzing trace with hash -621255906, now seen corresponding path program 1 times [2019-11-06 22:50:28,382 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:28,382 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280303007] [2019-11-06 22:50:28,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:50:28,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280303007] [2019-11-06 22:50:28,571 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:28,572 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:50:28,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925567738] [2019-11-06 22:50:28,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:50:28,573 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:28,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:50:28,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:50:28,574 INFO L87 Difference]: Start difference. First operand 1326 states and 1863 transitions. Second operand 4 states. [2019-11-06 22:50:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:29,912 INFO L93 Difference]: Finished difference Result 4126 states and 5834 transitions. [2019-11-06 22:50:29,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:50:29,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2019-11-06 22:50:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:29,930 INFO L225 Difference]: With dead ends: 4126 [2019-11-06 22:50:29,930 INFO L226 Difference]: Without dead ends: 2806 [2019-11-06 22:50:29,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:50:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2019-11-06 22:50:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2258. [2019-11-06 22:50:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2258 states. [2019-11-06 22:50:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3058 transitions. [2019-11-06 22:50:30,007 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3058 transitions. Word has length 227 [2019-11-06 22:50:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:30,010 INFO L462 AbstractCegarLoop]: Abstraction has 2258 states and 3058 transitions. [2019-11-06 22:50:30,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:50:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3058 transitions. [2019-11-06 22:50:30,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-11-06 22:50:30,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:30,020 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-11-06 22:50:30,020 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1660138625, now seen corresponding path program 1 times [2019-11-06 22:50:30,021 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:30,021 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592626223] [2019-11-06 22:50:30,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:30,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592626223] [2019-11-06 22:50:30,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615117065] [2019-11-06 22:50:30,375 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 22:50:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:30,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:50:30,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:50:30,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-06 22:50:30,783 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:50:30,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:30,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:30,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:30,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:31,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:31,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:50:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 128 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:50:31,369 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:50:31,369 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:50:31,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631251805] [2019-11-06 22:50:31,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:50:31,370 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:31,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:50:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:50:31,371 INFO L87 Difference]: Start difference. First operand 2258 states and 3058 transitions. Second operand 5 states. [2019-11-06 22:50:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:32,942 INFO L93 Difference]: Finished difference Result 4360 states and 5977 transitions. [2019-11-06 22:50:32,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:50:32,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2019-11-06 22:50:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:32,954 INFO L225 Difference]: With dead ends: 4360 [2019-11-06 22:50:32,955 INFO L226 Difference]: Without dead ends: 2290 [2019-11-06 22:50:32,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 667 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:50:32,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2019-11-06 22:50:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2270. [2019-11-06 22:50:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2270 states. [2019-11-06 22:50:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3040 transitions. [2019-11-06 22:50:33,018 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3040 transitions. Word has length 336 [2019-11-06 22:50:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:33,019 INFO L462 AbstractCegarLoop]: Abstraction has 2270 states and 3040 transitions. [2019-11-06 22:50:33,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:50:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3040 transitions. [2019-11-06 22:50:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-11-06 22:50:33,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:33,031 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, 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, 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 22:50:33,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:50:33,236 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:33,237 INFO L82 PathProgramCache]: Analyzing trace with hash -178670679, now seen corresponding path program 1 times [2019-11-06 22:50:33,237 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:33,238 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700385363] [2019-11-06 22:50:33,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 278 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:50:34,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700385363] [2019-11-06 22:50:34,108 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980385508] [2019-11-06 22:50:34,108 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 22:50:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:34,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 22:50:34,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:50:34,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:50:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 354 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-06 22:50:34,552 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:50:34,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:50:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 200 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:50:35,121 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [997660116] [2019-11-06 22:50:35,127 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 421 [2019-11-06 22:50:35,178 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:50:35,178 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)