java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:57:38,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:57:38,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:57:38,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:57:38,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:57:38,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:57:38,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:57:38,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:57:38,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:57:38,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:57:38,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:57:38,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:57:38,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:57:38,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:57:38,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:57:38,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:57:38,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:57:38,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:57:38,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:57:38,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:57:38,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:57:38,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:57:38,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:57:38,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:57:38,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:57:38,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:57:38,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:57:38,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:57:38,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:57:38,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:57:38,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:57:38,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:57:38,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:57:38,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:57:38,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:57:38,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:57:38,096 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 [2019-10-14 23:57:38,111 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:57:38,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:57:38,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:57:38,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:57:38,113 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:57:38,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:57:38,113 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:57:38,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:57:38,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:57:38,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:57:38,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:57:38,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:57:38,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:57:38,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:57:38,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:57:38,115 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:57:38,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:57:38,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:57:38,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:57:38,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:57:38,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:57:38,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:57:38,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:57:38,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:57:38,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:57:38,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:57:38,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:57:38,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:57:38,118 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 [2019-10-14 23:57:38,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:57:38,409 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:57:38,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:57:38,414 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:57:38,414 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:57:38,415 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-10-14 23:57:38,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d85c81a7/a956adf2aefa45b0ba5a090a9bb58088/FLAG93dcf98f2 [2019-10-14 23:57:39,041 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:57:39,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-10-14 23:57:39,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d85c81a7/a956adf2aefa45b0ba5a090a9bb58088/FLAG93dcf98f2 [2019-10-14 23:57:39,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d85c81a7/a956adf2aefa45b0ba5a090a9bb58088 [2019-10-14 23:57:39,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:57:39,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:57:39,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:39,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:57:39,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:57:39,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:39" (1/1) ... [2019-10-14 23:57:39,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4621a2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:39, skipping insertion in model container [2019-10-14 23:57:39,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:39" (1/1) ... [2019-10-14 23:57:39,342 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:57:39,395 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:57:39,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:39,799 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:57:40,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:40,042 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:57:40,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40 WrapperNode [2019-10-14 23:57:40,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:40,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:57:40,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:57:40,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:57:40,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40" (1/1) ... [2019-10-14 23:57:40,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40" (1/1) ... [2019-10-14 23:57:40,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40" (1/1) ... [2019-10-14 23:57:40,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40" (1/1) ... [2019-10-14 23:57:40,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40" (1/1) ... [2019-10-14 23:57:40,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40" (1/1) ... [2019-10-14 23:57:40,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40" (1/1) ... [2019-10-14 23:57:40,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:57:40,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:57:40,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:57:40,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:57:40,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40" (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 [2019-10-14 23:57:40,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:57:40,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:57:40,204 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:57:40,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:57:40,204 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:57:40,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:57:40,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:57:40,204 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:57:40,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:57:40,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:57:40,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:57:41,330 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:57:41,330 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:57:41,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:41 BoogieIcfgContainer [2019-10-14 23:57:41,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:57:41,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:57:41,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:57:41,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:57:41,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:57:39" (1/3) ... [2019-10-14 23:57:41,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e5eba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:41, skipping insertion in model container [2019-10-14 23:57:41,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:40" (2/3) ... [2019-10-14 23:57:41,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e5eba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:41, skipping insertion in model container [2019-10-14 23:57:41,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:41" (3/3) ... [2019-10-14 23:57:41,340 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label50.c [2019-10-14 23:57:41,350 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:57:41,359 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:57:41,371 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:57:41,398 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:57:41,398 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:57:41,398 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:57:41,399 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:57:41,402 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:57:41,402 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:57:41,403 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:57:41,403 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:57:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:57:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 23:57:41,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:41,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:41,440 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:41,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1330544841, now seen corresponding path program 1 times [2019-10-14 23:57:41,455 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:41,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420384507] [2019-10-14 23:57:41,456 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:41,456 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:41,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:41,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420384507] [2019-10-14 23:57:41,861 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:41,861 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:57:41,862 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746250452] [2019-10-14 23:57:41,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:41,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:41,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:41,891 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:57:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:42,800 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-10-14 23:57:42,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:42,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2019-10-14 23:57:42,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:42,832 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:57:42,832 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:57:42,845 INFO L600 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 [2019-10-14 23:57:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:57:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:57:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:57:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-10-14 23:57:42,950 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 87 [2019-10-14 23:57:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:42,951 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-10-14 23:57:42,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-10-14 23:57:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:57:42,957 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:42,958 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:42,958 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:42,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:42,958 INFO L82 PathProgramCache]: Analyzing trace with hash 979586382, now seen corresponding path program 1 times [2019-10-14 23:57:42,959 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:42,959 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207750945] [2019-10-14 23:57:42,959 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:42,959 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:42,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:43,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207750945] [2019-10-14 23:57:43,153 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:43,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:57:43,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179857212] [2019-10-14 23:57:43,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:43,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:43,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:43,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:43,157 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 3 states. [2019-10-14 23:57:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:43,738 INFO L93 Difference]: Finished difference Result 931 states and 1377 transitions. [2019-10-14 23:57:43,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:43,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-14 23:57:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:43,743 INFO L225 Difference]: With dead ends: 931 [2019-10-14 23:57:43,743 INFO L226 Difference]: Without dead ends: 617 [2019-10-14 23:57:43,745 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 [2019-10-14 23:57:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2019-10-14 23:57:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 612. [2019-10-14 23:57:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-14 23:57:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 857 transitions. [2019-10-14 23:57:43,777 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 857 transitions. Word has length 95 [2019-10-14 23:57:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:43,777 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 857 transitions. [2019-10-14 23:57:43,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 857 transitions. [2019-10-14 23:57:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 23:57:43,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:43,783 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:57:43,783 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:43,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2117634278, now seen corresponding path program 1 times [2019-10-14 23:57:43,784 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:43,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092592321] [2019-10-14 23:57:43,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:43,785 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:43,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:43,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092592321] [2019-10-14 23:57:43,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:43,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:57:43,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767255189] [2019-10-14 23:57:43,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:57:43,948 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:43,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:57:43,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:57:43,948 INFO L87 Difference]: Start difference. First operand 612 states and 857 transitions. Second operand 6 states. [2019-10-14 23:57:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:44,818 INFO L93 Difference]: Finished difference Result 1834 states and 2681 transitions. [2019-10-14 23:57:44,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:57:44,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-14 23:57:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:44,828 INFO L225 Difference]: With dead ends: 1834 [2019-10-14 23:57:44,828 INFO L226 Difference]: Without dead ends: 1228 [2019-10-14 23:57:44,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:57:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2019-10-14 23:57:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1212. [2019-10-14 23:57:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2019-10-14 23:57:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1654 transitions. [2019-10-14 23:57:44,883 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1654 transitions. Word has length 101 [2019-10-14 23:57:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:44,884 INFO L462 AbstractCegarLoop]: Abstraction has 1212 states and 1654 transitions. [2019-10-14 23:57:44,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:57:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1654 transitions. [2019-10-14 23:57:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:57:44,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:44,890 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:57:44,890 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:44,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2096741041, now seen corresponding path program 1 times [2019-10-14 23:57:44,891 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:44,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954365869] [2019-10-14 23:57:44,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:44,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:44,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:45,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954365869] [2019-10-14 23:57:45,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:45,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:57:45,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527734145] [2019-10-14 23:57:45,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:57:45,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:45,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:57:45,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:57:45,006 INFO L87 Difference]: Start difference. First operand 1212 states and 1654 transitions. Second operand 6 states. [2019-10-14 23:57:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:45,922 INFO L93 Difference]: Finished difference Result 3038 states and 4246 transitions. [2019-10-14 23:57:45,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:57:45,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-10-14 23:57:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:45,939 INFO L225 Difference]: With dead ends: 3038 [2019-10-14 23:57:45,939 INFO L226 Difference]: Without dead ends: 1832 [2019-10-14 23:57:45,942 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:57:45,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2019-10-14 23:57:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1814. [2019-10-14 23:57:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1814 states. [2019-10-14 23:57:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2426 transitions. [2019-10-14 23:57:46,039 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2426 transitions. Word has length 109 [2019-10-14 23:57:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:46,040 INFO L462 AbstractCegarLoop]: Abstraction has 1814 states and 2426 transitions. [2019-10-14 23:57:46,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:57:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2426 transitions. [2019-10-14 23:57:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 23:57:46,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:46,047 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:57:46,048 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:46,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1866094056, now seen corresponding path program 1 times [2019-10-14 23:57:46,049 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:46,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298270966] [2019-10-14 23:57:46,050 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:46,050 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:46,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:57:46,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298270966] [2019-10-14 23:57:46,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514803606] [2019-10-14 23:57:46,251 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 [2019-10-14 23:57:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:46,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:57:46,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:57:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:57:46,474 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:57:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:57:46,538 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:57:46,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-10-14 23:57:46,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836473344] [2019-10-14 23:57:46,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:46,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:46,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:57:46,541 INFO L87 Difference]: Start difference. First operand 1814 states and 2426 transitions. Second operand 3 states. [2019-10-14 23:57:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:47,150 INFO L93 Difference]: Finished difference Result 4644 states and 6253 transitions. [2019-10-14 23:57:47,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:47,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2019-10-14 23:57:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:47,162 INFO L225 Difference]: With dead ends: 4644 [2019-10-14 23:57:47,162 INFO L226 Difference]: Without dead ends: 1658 [2019-10-14 23:57:47,169 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:57:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2019-10-14 23:57:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2019-10-14 23:57:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2019-10-14 23:57:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2133 transitions. [2019-10-14 23:57:47,227 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2133 transitions. Word has length 122 [2019-10-14 23:57:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:47,228 INFO L462 AbstractCegarLoop]: Abstraction has 1658 states and 2133 transitions. [2019-10-14 23:57:47,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2133 transitions. [2019-10-14 23:57:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:57:47,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:47,235 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:47,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:57:47,449 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:47,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2006010265, now seen corresponding path program 1 times [2019-10-14 23:57:47,451 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:47,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943147929] [2019-10-14 23:57:47,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:47,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:47,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:57:47,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943147929] [2019-10-14 23:57:47,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943608469] [2019-10-14 23:57:47,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:57:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:47,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:57:47,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:57:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:57:47,723 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:57:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:57:47,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [731112788] [2019-10-14 23:57:47,811 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 133 [2019-10-14 23:57:47,857 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:57:47,858 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)