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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:56:30,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:56:30,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:56:30,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:56:30,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:56:30,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:56:30,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:56:30,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:56:30,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:56:30,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:56:30,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:56:30,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:56:30,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:56:30,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:56:30,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:56:30,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:56:30,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:56:30,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:56:30,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:56:30,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:56:30,699 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 01:56:30,714 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:56:30,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:56:30,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:56:30,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:56:30,716 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:56:30,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:56:30,716 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:56:30,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:56:30,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:56:30,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:56:30,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:56:30,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:56:30,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:56:30,718 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:56:30,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:56:30,718 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:56:30,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:56:30,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:56:30,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:56:30,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:56:30,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:56:30,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:56:30,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:56:30,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:56:30,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:56:30,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:56:30,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:56:30,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:56:30,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:56:31,015 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:56:31,037 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:56:31,044 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:56:31,045 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:56:31,046 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:56:31,046 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-15 01:56:31,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06c5b5da3/1bd689bcbe114b15a76495f69d8b4727/FLAG6cf973665 [2019-10-15 01:56:31,820 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:56:31,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-15 01:56:31,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06c5b5da3/1bd689bcbe114b15a76495f69d8b4727/FLAG6cf973665 [2019-10-15 01:56:31,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06c5b5da3/1bd689bcbe114b15a76495f69d8b4727 [2019-10-15 01:56:31,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:56:32,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:56:32,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:32,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:56:32,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:56:32,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:31" (1/1) ... [2019-10-15 01:56:32,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338e2a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:32, skipping insertion in model container [2019-10-15 01:56:32,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:31" (1/1) ... [2019-10-15 01:56:32,016 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:56:32,086 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:56:32,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:32,856 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:56:33,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:33,267 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:56:33,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33 WrapperNode [2019-10-15 01:56:33,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:33,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:56:33,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:56:33,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:56:33,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33" (1/1) ... [2019-10-15 01:56:33,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33" (1/1) ... [2019-10-15 01:56:33,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33" (1/1) ... [2019-10-15 01:56:33,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33" (1/1) ... [2019-10-15 01:56:33,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33" (1/1) ... [2019-10-15 01:56:33,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33" (1/1) ... [2019-10-15 01:56:33,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33" (1/1) ... [2019-10-15 01:56:33,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:56:33,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:56:33,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:56:33,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:56:33,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33" (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 01:56:33,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:56:33,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:56:33,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:56:33,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:56:33,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:56:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:56:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:56:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:56:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:56:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:56:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:56:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:56:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:56:57,909 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:56:57,909 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:56:57,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:57 BoogieIcfgContainer [2019-10-15 01:56:57,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:56:57,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:56:57,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:56:57,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:56:57,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:56:31" (1/3) ... [2019-10-15 01:56:57,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d093ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:57, skipping insertion in model container [2019-10-15 01:56:57,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:33" (2/3) ... [2019-10-15 01:56:57,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d093ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:57, skipping insertion in model container [2019-10-15 01:56:57,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:57" (3/3) ... [2019-10-15 01:56:57,920 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label40.c [2019-10-15 01:56:57,932 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:56:57,943 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:56:57,957 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:56:58,006 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:56:58,007 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:56:58,007 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:56:58,007 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:56:58,007 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:56:58,008 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:56:58,008 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:56:58,008 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:56:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:56:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:56:58,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:58,047 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:58,049 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:58,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash 863568959, now seen corresponding path program 1 times [2019-10-15 01:56:58,062 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:58,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700929424] [2019-10-15 01:56:58,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:58,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:58,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:58,329 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 01:56:58,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700929424] [2019-10-15 01:56:58,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:58,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:56:58,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619894266] [2019-10-15 01:56:58,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:56:58,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:58,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:56:58,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:56:58,355 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:57:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:00,196 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:57:00,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:57:00,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:57:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:00,218 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:57:00,218 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:57:00,226 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 [2019-10-15 01:57:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:57:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2019-10-15 01:57:00,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-15 01:57:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2019-10-15 01:57:00,315 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2019-10-15 01:57:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:00,316 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2019-10-15 01:57:00,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:57:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2019-10-15 01:57:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:57:00,319 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:00,319 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] [2019-10-15 01:57:00,320 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash -98068442, now seen corresponding path program 1 times [2019-10-15 01:57:00,321 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:00,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235142062] [2019-10-15 01:57:00,321 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:00,321 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:00,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:00,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235142062] [2019-10-15 01:57:00,497 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:00,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:00,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3581782] [2019-10-15 01:57:00,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:00,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:00,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:00,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:00,501 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand 6 states. [2019-10-15 01:57:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:02,675 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2019-10-15 01:57:02,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:02,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-15 01:57:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:02,685 INFO L225 Difference]: With dead ends: 1390 [2019-10-15 01:57:02,685 INFO L226 Difference]: Without dead ends: 933 [2019-10-15 01:57:02,690 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 [2019-10-15 01:57:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2019-10-15 01:57:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2019-10-15 01:57:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-15 01:57:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2019-10-15 01:57:02,749 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2019-10-15 01:57:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:02,750 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2019-10-15 01:57:02,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2019-10-15 01:57:02,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 01:57:02,754 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:02,754 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:02,755 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:02,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1543535517, now seen corresponding path program 1 times [2019-10-15 01:57:02,755 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:02,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596087133] [2019-10-15 01:57:02,756 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:02,756 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:02,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:03,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596087133] [2019-10-15 01:57:03,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584288841] [2019-10-15 01:57:03,006 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 01:57:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:03,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:03,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:57:03,236 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:03,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:03,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:03,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49454929] [2019-10-15 01:57:03,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:03,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:03,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:03,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:03,319 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand 5 states. [2019-10-15 01:57:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:05,279 INFO L93 Difference]: Finished difference Result 2074 states and 3785 transitions. [2019-10-15 01:57:05,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:05,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2019-10-15 01:57:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:05,288 INFO L225 Difference]: With dead ends: 2074 [2019-10-15 01:57:05,289 INFO L226 Difference]: Without dead ends: 1162 [2019-10-15 01:57:05,291 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:57:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-10-15 01:57:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1152. [2019-10-15 01:57:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-10-15 01:57:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2027 transitions. [2019-10-15 01:57:05,330 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2027 transitions. Word has length 95 [2019-10-15 01:57:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:05,330 INFO L462 AbstractCegarLoop]: Abstraction has 1152 states and 2027 transitions. [2019-10-15 01:57:05,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2027 transitions. [2019-10-15 01:57:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 01:57:05,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:05,336 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 01:57:05,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:05,541 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash 132680533, now seen corresponding path program 1 times [2019-10-15 01:57:05,542 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:05,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924090498] [2019-10-15 01:57:05,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:05,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:05,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:05,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924090498] [2019-10-15 01:57:05,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421332326] [2019-10-15 01:57:05,650 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 [2019-10-15 01:57:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:05,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:05,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:57:05,807 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:05,878 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:05,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 01:57:05,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278732864] [2019-10-15 01:57:05,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:05,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:05,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:05,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:05,881 INFO L87 Difference]: Start difference. First operand 1152 states and 2027 transitions. Second operand 5 states. [2019-10-15 01:57:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:08,956 INFO L93 Difference]: Finished difference Result 3270 states and 5830 transitions. [2019-10-15 01:57:08,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:08,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-15 01:57:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:08,971 INFO L225 Difference]: With dead ends: 3270 [2019-10-15 01:57:08,971 INFO L226 Difference]: Without dead ends: 2123 [2019-10-15 01:57:08,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:57:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2019-10-15 01:57:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2055. [2019-10-15 01:57:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2055 states. [2019-10-15 01:57:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3465 transitions. [2019-10-15 01:57:09,042 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3465 transitions. Word has length 111 [2019-10-15 01:57:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:09,042 INFO L462 AbstractCegarLoop]: Abstraction has 2055 states and 3465 transitions. [2019-10-15 01:57:09,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3465 transitions. [2019-10-15 01:57:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:57:09,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:09,046 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 01:57:09,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:09,259 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:09,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:09,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1269164659, now seen corresponding path program 1 times [2019-10-15 01:57:09,259 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:09,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284217309] [2019-10-15 01:57:09,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:09,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:09,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:09,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284217309] [2019-10-15 01:57:09,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200950237] [2019-10-15 01:57:09,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:09,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:09,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:57:09,542 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:09,605 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:09,606 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:09,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627945184] [2019-10-15 01:57:09,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:09,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:09,608 INFO L87 Difference]: Start difference. First operand 2055 states and 3465 transitions. Second operand 5 states. [2019-10-15 01:57:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:11,805 INFO L93 Difference]: Finished difference Result 5971 states and 10346 transitions. [2019-10-15 01:57:11,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:11,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-15 01:57:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:11,837 INFO L225 Difference]: With dead ends: 5971 [2019-10-15 01:57:11,839 INFO L226 Difference]: Without dead ends: 3921 [2019-10-15 01:57:11,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:57:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2019-10-15 01:57:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 3878. [2019-10-15 01:57:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2019-10-15 01:57:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5869 transitions. [2019-10-15 01:57:11,977 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5869 transitions. Word has length 115 [2019-10-15 01:57:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:11,978 INFO L462 AbstractCegarLoop]: Abstraction has 3878 states and 5869 transitions. [2019-10-15 01:57:11,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5869 transitions. [2019-10-15 01:57:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-15 01:57:11,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:11,989 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]