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/Problem16_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:15,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:15,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:15,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:08:15,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:08:15,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:08:15,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:08:15,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:08:15,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:08:15,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:08:15,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:08:15,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:08:15,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:15,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:15,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:15,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:15,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:15,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:15,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:15,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:15,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:15,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:15,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:15,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:15,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:15,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:15,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:15,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:15,078 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:08:15,092 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:15,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:15,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:15,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:15,094 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:15,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:15,095 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:15,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:15,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:15,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:15,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:15,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:15,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:15,097 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:15,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:15,098 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:15,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:15,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:15,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:15,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:15,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:15,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:15,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:15,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:15,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:15,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:15,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:15,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:15,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:08:15,431 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:15,449 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:15,453 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:15,454 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:15,456 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:15,457 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-10-15 00:08:15,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3cd8fa4f/be508bcc13e747508f5c43a448448738/FLAGa67b4ed0d [2019-10-15 00:08:16,296 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:16,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-10-15 00:08:16,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3cd8fa4f/be508bcc13e747508f5c43a448448738/FLAGa67b4ed0d [2019-10-15 00:08:16,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3cd8fa4f/be508bcc13e747508f5c43a448448738 [2019-10-15 00:08:16,406 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:16,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:16,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:16,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:16,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:16,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:16" (1/1) ... [2019-10-15 00:08:16,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6a8581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:16, skipping insertion in model container [2019-10-15 00:08:16,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:16" (1/1) ... [2019-10-15 00:08:16,427 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:16,514 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:17,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:17,360 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:17,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:17,749 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:17,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17 WrapperNode [2019-10-15 00:08:17,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:17,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:17,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:17,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:17,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17" (1/1) ... [2019-10-15 00:08:17,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17" (1/1) ... [2019-10-15 00:08:17,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17" (1/1) ... [2019-10-15 00:08:17,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17" (1/1) ... [2019-10-15 00:08:17,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17" (1/1) ... [2019-10-15 00:08:17,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17" (1/1) ... [2019-10-15 00:08:17,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17" (1/1) ... [2019-10-15 00:08:17,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:17,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:17,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:17,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:17,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:18,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:18,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:18,017 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:18,017 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:18,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:18,019 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:18,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:18,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:18,020 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:18,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:18,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:18,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:08:20,435 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:08:20,435 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:08:20,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:20 BoogieIcfgContainer [2019-10-15 00:08:20,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:08:20,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:08:20,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:08:20,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:08:20,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:16" (1/3) ... [2019-10-15 00:08:20,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a905ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:20, skipping insertion in model container [2019-10-15 00:08:20,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:17" (2/3) ... [2019-10-15 00:08:20,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a905ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:20, skipping insertion in model container [2019-10-15 00:08:20,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:20" (3/3) ... [2019-10-15 00:08:20,451 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label16.c [2019-10-15 00:08:20,466 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:08:20,478 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:08:20,490 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:08:20,539 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:08:20,539 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:08:20,539 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:08:20,539 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:08:20,540 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:08:20,540 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:08:20,540 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:08:20,540 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:08:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:08:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-15 00:08:20,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:20,595 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:20,599 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1899898085, now seen corresponding path program 1 times [2019-10-15 00:08:20,615 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:20,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796269806] [2019-10-15 00:08:20,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:20,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:20,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:20,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796269806] [2019-10-15 00:08:20,963 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:20,963 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:08:20,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737930207] [2019-10-15 00:08:20,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:08:20,974 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:20,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:08:20,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:08:20,995 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:08:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:23,151 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:08:23,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:08:23,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-10-15 00:08:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:23,177 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:08:23,178 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:08:23,188 INFO L600 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 [2019-10-15 00:08:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:08:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:08:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:08:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1154 transitions. [2019-10-15 00:08:23,310 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1154 transitions. Word has length 48 [2019-10-15 00:08:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:23,311 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1154 transitions. [2019-10-15 00:08:23,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:08:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1154 transitions. [2019-10-15 00:08:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 00:08:23,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:23,319 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:08:23,319 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:23,320 INFO L82 PathProgramCache]: Analyzing trace with hash 301606541, now seen corresponding path program 1 times [2019-10-15 00:08:23,320 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:23,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219556464] [2019-10-15 00:08:23,321 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:23,321 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:23,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:23,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219556464] [2019-10-15 00:08:23,679 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:23,679 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:23,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088056459] [2019-10-15 00:08:23,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:23,683 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:23,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:23,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:23,684 INFO L87 Difference]: Start difference. First operand 682 states and 1154 transitions. Second operand 6 states. [2019-10-15 00:08:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:30,262 INFO L93 Difference]: Finished difference Result 2808 states and 4912 transitions. [2019-10-15 00:08:30,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 00:08:30,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-10-15 00:08:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:30,281 INFO L225 Difference]: With dead ends: 2808 [2019-10-15 00:08:30,281 INFO L226 Difference]: Without dead ends: 2132 [2019-10-15 00:08:30,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:08:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2019-10-15 00:08:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2087. [2019-10-15 00:08:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2019-10-15 00:08:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3381 transitions. [2019-10-15 00:08:30,378 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3381 transitions. Word has length 123 [2019-10-15 00:08:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:30,379 INFO L462 AbstractCegarLoop]: Abstraction has 2087 states and 3381 transitions. [2019-10-15 00:08:30,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3381 transitions. [2019-10-15 00:08:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 00:08:30,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:30,383 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:30,383 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:30,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1614630469, now seen corresponding path program 1 times [2019-10-15 00:08:30,384 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:30,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534203161] [2019-10-15 00:08:30,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:30,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:30,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:30,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534203161] [2019-10-15 00:08:30,581 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:30,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:30,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682640608] [2019-10-15 00:08:30,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:30,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:30,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:30,584 INFO L87 Difference]: Start difference. First operand 2087 states and 3381 transitions. Second operand 6 states. [2019-10-15 00:08:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:33,868 INFO L93 Difference]: Finished difference Result 5623 states and 9425 transitions. [2019-10-15 00:08:33,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:08:33,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-10-15 00:08:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:33,894 INFO L225 Difference]: With dead ends: 5623 [2019-10-15 00:08:33,895 INFO L226 Difference]: Without dead ends: 3542 [2019-10-15 00:08:33,902 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:08:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-10-15 00:08:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3503. [2019-10-15 00:08:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2019-10-15 00:08:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5697 transitions. [2019-10-15 00:08:34,013 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5697 transitions. Word has length 127 [2019-10-15 00:08:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:34,013 INFO L462 AbstractCegarLoop]: Abstraction has 3503 states and 5697 transitions. [2019-10-15 00:08:34,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5697 transitions. [2019-10-15 00:08:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 00:08:34,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:34,017 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:34,017 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash 939099681, now seen corresponding path program 1 times [2019-10-15 00:08:34,018 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:34,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184810848] [2019-10-15 00:08:34,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:34,019 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:34,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:34,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184810848] [2019-10-15 00:08:34,161 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:34,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:34,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949060454] [2019-10-15 00:08:34,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:34,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:34,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:34,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:34,164 INFO L87 Difference]: Start difference. First operand 3503 states and 5697 transitions. Second operand 6 states. [2019-10-15 00:08:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:36,865 INFO L93 Difference]: Finished difference Result 7817 states and 13132 transitions. [2019-10-15 00:08:36,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:36,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-10-15 00:08:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:36,906 INFO L225 Difference]: With dead ends: 7817 [2019-10-15 00:08:36,906 INFO L226 Difference]: Without dead ends: 4320 [2019-10-15 00:08:36,923 INFO L600 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 [2019-10-15 00:08:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2019-10-15 00:08:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 4279. [2019-10-15 00:08:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4279 states. [2019-10-15 00:08:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 6768 transitions. [2019-10-15 00:08:37,124 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 6768 transitions. Word has length 129 [2019-10-15 00:08:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:37,126 INFO L462 AbstractCegarLoop]: Abstraction has 4279 states and 6768 transitions. [2019-10-15 00:08:37,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 6768 transitions. [2019-10-15 00:08:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:08:37,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:37,132 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:08:37,133 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1902020488, now seen corresponding path program 1 times [2019-10-15 00:08:37,134 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:37,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349255360] [2019-10-15 00:08:37,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:37,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:37,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:37,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349255360] [2019-10-15 00:08:37,385 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:37,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:37,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636314630] [2019-10-15 00:08:37,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:37,386 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:37,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:37,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:37,387 INFO L87 Difference]: Start difference. First operand 4279 states and 6768 transitions. Second operand 6 states. [2019-10-15 00:08:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:40,103 INFO L93 Difference]: Finished difference Result 11663 states and 19030 transitions. [2019-10-15 00:08:40,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:40,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2019-10-15 00:08:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:40,142 INFO L225 Difference]: With dead ends: 11663 [2019-10-15 00:08:40,142 INFO L226 Difference]: Without dead ends: 7390 [2019-10-15 00:08:40,157 INFO L600 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 [2019-10-15 00:08:40,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2019-10-15 00:08:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 7362. [2019-10-15 00:08:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7362 states. [2019-10-15 00:08:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 10905 transitions. [2019-10-15 00:08:40,362 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 10905 transitions. Word has length 132 [2019-10-15 00:08:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:40,362 INFO L462 AbstractCegarLoop]: Abstraction has 7362 states and 10905 transitions. [2019-10-15 00:08:40,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 10905 transitions. [2019-10-15 00:08:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 00:08:40,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:40,364 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:40,365 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:40,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:40,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1440393839, now seen corresponding path program 1 times [2019-10-15 00:08:40,365 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:40,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844668429] [2019-10-15 00:08:40,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:40,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:40,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:40,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844668429] [2019-10-15 00:08:40,478 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:40,478 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:40,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033836641] [2019-10-15 00:08:40,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:40,479 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:40,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:40,480 INFO L87 Difference]: Start difference. First operand 7362 states and 10905 transitions. Second operand 6 states. [2019-10-15 00:08:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:44,820 INFO L93 Difference]: Finished difference Result 16133 states and 24072 transitions. [2019-10-15 00:08:44,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:44,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-10-15 00:08:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:44,876 INFO L225 Difference]: With dead ends: 16133 [2019-10-15 00:08:44,876 INFO L226 Difference]: Without dead ends: 8777 [2019-10-15 00:08:44,898 INFO L600 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 [2019-10-15 00:08:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8777 states. [2019-10-15 00:08:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8777 to 7746. [2019-10-15 00:08:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7746 states. [2019-10-15 00:08:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 10527 transitions. [2019-10-15 00:08:45,202 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 10527 transitions. Word has length 137 [2019-10-15 00:08:45,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:45,203 INFO L462 AbstractCegarLoop]: Abstraction has 7746 states and 10527 transitions. [2019-10-15 00:08:45,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 10527 transitions. [2019-10-15 00:08:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-15 00:08:45,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:45,210 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:08:45,210 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash -37681811, now seen corresponding path program 1 times [2019-10-15 00:08:45,211 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:45,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086791378] [2019-10-15 00:08:45,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:45,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:45,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:08:45,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086791378] [2019-10-15 00:08:45,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546989053] [2019-10-15 00:08:45,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:45,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:08:45,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:45,710 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:45,793 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:08:45,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 00:08:45,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859276702] [2019-10-15 00:08:45,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:45,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:45,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:45,796 INFO L87 Difference]: Start difference. First operand 7746 states and 10527 transitions. Second operand 4 states. [2019-10-15 00:08:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:49,079 INFO L93 Difference]: Finished difference Result 22600 states and 31225 transitions. [2019-10-15 00:08:49,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:49,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-10-15 00:08:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:49,142 INFO L225 Difference]: With dead ends: 22600 [2019-10-15 00:08:49,142 INFO L226 Difference]: Without dead ends: 14860 [2019-10-15 00:08:49,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14860 states. [2019-10-15 00:08:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14860 to 12439. [2019-10-15 00:08:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12439 states. [2019-10-15 00:08:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12439 states to 12439 states and 16201 transitions. [2019-10-15 00:08:49,600 INFO L78 Accepts]: Start accepts. Automaton has 12439 states and 16201 transitions. Word has length 139 [2019-10-15 00:08:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:49,601 INFO L462 AbstractCegarLoop]: Abstraction has 12439 states and 16201 transitions. [2019-10-15 00:08:49,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand 12439 states and 16201 transitions. [2019-10-15 00:08:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2019-10-15 00:08:49,628 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:49,628 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:49,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:49,833 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:49,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:49,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1505126243, now seen corresponding path program 1 times [2019-10-15 00:08:49,834 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:49,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662099459] [2019-10-15 00:08:49,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:49,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:49,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat