/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --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/array-examples/standard_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:22:34,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:22:34,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:22:34,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:22:34,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:22:34,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:22:34,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:22:34,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:22:34,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:22:34,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:22:34,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:22:34,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:22:34,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:22:34,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:22:34,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:22:34,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:22:34,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:22:34,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:22:34,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:22:34,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:22:34,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:22:34,162 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:22:34,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:22:34,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:22:34,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:22:34,165 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:22:34,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:22:34,165 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:22:34,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:22:34,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:22:34,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:22:34,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:22:34,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:22:34,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:22:34,167 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:22:34,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:22:34,168 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:22:34,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:22:34,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:22:34,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:22:34,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:22:34,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:22:34,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:22:34,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:22:34,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:22:34,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:22:34,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:22:34,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:22:34,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:22:34,170 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 [2019-11-07 01:22:34,452 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:22:34,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:22:34,469 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:22:34,470 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:22:34,471 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:22:34,471 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-11-07 01:22:34,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0a3b7a80/441d10119b0140488903a134766f9bda/FLAG1e7ea6275 [2019-11-07 01:22:34,977 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:22:34,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-11-07 01:22:34,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0a3b7a80/441d10119b0140488903a134766f9bda/FLAG1e7ea6275 [2019-11-07 01:22:35,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0a3b7a80/441d10119b0140488903a134766f9bda [2019-11-07 01:22:35,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:22:35,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:22:35,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:22:35,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:22:35,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:22:35,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:35" (1/1) ... [2019-11-07 01:22:35,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b51c073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35, skipping insertion in model container [2019-11-07 01:22:35,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:35" (1/1) ... [2019-11-07 01:22:35,455 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:22:35,503 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:22:35,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:22:35,817 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:22:35,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:22:35,973 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:22:35,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35 WrapperNode [2019-11-07 01:22:35,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:22:35,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:22:35,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:22:35,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:22:35,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35" (1/1) ... [2019-11-07 01:22:35,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35" (1/1) ... [2019-11-07 01:22:35,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35" (1/1) ... [2019-11-07 01:22:35,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35" (1/1) ... [2019-11-07 01:22:36,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35" (1/1) ... [2019-11-07 01:22:36,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35" (1/1) ... [2019-11-07 01:22:36,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35" (1/1) ... [2019-11-07 01:22:36,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:22:36,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:22:36,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:22:36,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:22:36,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:22:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:22:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:22:36,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:22:36,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:22:36,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:22:36,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:22:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:22:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:22:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:22:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:22:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:22:36,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:22:36,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:22:36,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:22:36,699 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:22:36,700 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 01:22:36,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:36 BoogieIcfgContainer [2019-11-07 01:22:36,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:22:36,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:22:36,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:22:36,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:22:36,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:22:35" (1/3) ... [2019-11-07 01:22:36,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f798d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:36, skipping insertion in model container [2019-11-07 01:22:36,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35" (2/3) ... [2019-11-07 01:22:36,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f798d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:36, skipping insertion in model container [2019-11-07 01:22:36,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:36" (3/3) ... [2019-11-07 01:22:36,712 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2019-11-07 01:22:36,722 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:22:36,731 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:22:36,740 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:22:36,764 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:22:36,764 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:22:36,765 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:22:36,765 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:22:36,765 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:22:36,766 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:22:36,766 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:22:36,766 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:22:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-07 01:22:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 01:22:36,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:36,792 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:36,794 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:36,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1040189996, now seen corresponding path program 1 times [2019-11-07 01:22:36,806 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:36,807 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176002975] [2019-11-07 01:22:36,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:22:37,030 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176002975] [2019-11-07 01:22:37,031 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:22:37,032 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:22:37,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705578074] [2019-11-07 01:22:37,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:22:37,038 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:37,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:22:37,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:22:37,056 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-07 01:22:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:37,093 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-11-07 01:22:37,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:22:37,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-07 01:22:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:37,109 INFO L225 Difference]: With dead ends: 47 [2019-11-07 01:22:37,109 INFO L226 Difference]: Without dead ends: 24 [2019-11-07 01:22:37,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:22:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-07 01:22:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-07 01:22:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:22:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2019-11-07 01:22:37,175 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 19 [2019-11-07 01:22:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:37,176 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-07 01:22:37,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:22:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2019-11-07 01:22:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:22:37,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:37,180 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:37,181 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:37,182 INFO L82 PathProgramCache]: Analyzing trace with hash -537190458, now seen corresponding path program 1 times [2019-11-07 01:22:37,182 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:37,183 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262319780] [2019-11-07 01:22:37,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:22:37,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262319780] [2019-11-07 01:22:37,293 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:22:37,293 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:22:37,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393450892] [2019-11-07 01:22:37,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:22:37,301 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:37,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:22:37,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:22:37,301 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand 3 states. [2019-11-07 01:22:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:37,395 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2019-11-07 01:22:37,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:22:37,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-07 01:22:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:37,398 INFO L225 Difference]: With dead ends: 48 [2019-11-07 01:22:37,401 INFO L226 Difference]: Without dead ends: 32 [2019-11-07 01:22:37,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:22:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-07 01:22:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-07 01:22:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:22:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-11-07 01:22:37,418 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 20 [2019-11-07 01:22:37,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:37,420 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-11-07 01:22:37,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:22:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-11-07 01:22:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:22:37,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:37,423 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:37,423 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash -669181734, now seen corresponding path program 1 times [2019-11-07 01:22:37,425 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:37,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086900987] [2019-11-07 01:22:37,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:22:37,624 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086900987] [2019-11-07 01:22:37,624 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415557903] [2019-11-07 01:22:37,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:37,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:22:37,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:22:37,775 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:22:37,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748255136] [2019-11-07 01:22:37,878 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:22:37,879 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:37,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:37,896 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:37,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:38,042 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:38,753 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:40,168 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:40,220 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:40,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:40,233 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:40,498 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:40,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:22:40,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096813348] [2019-11-07 01:22:40,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:22:40,501 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:22:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:22:40,502 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 18 states. [2019-11-07 01:22:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:41,321 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2019-11-07 01:22:41,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:22:41,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2019-11-07 01:22:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:41,323 INFO L225 Difference]: With dead ends: 77 [2019-11-07 01:22:41,323 INFO L226 Difference]: Without dead ends: 52 [2019-11-07 01:22:41,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:22:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-07 01:22:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2019-11-07 01:22:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-07 01:22:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-11-07 01:22:41,335 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 28 [2019-11-07 01:22:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:41,335 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-11-07 01:22:41,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:22:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-11-07 01:22:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-07 01:22:41,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:41,337 INFO L410 BasicCegarLoop]: trace histogram [4, 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] [2019-11-07 01:22:41,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:41,541 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:41,542 INFO L82 PathProgramCache]: Analyzing trace with hash 619647852, now seen corresponding path program 2 times [2019-11-07 01:22:41,543 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:41,543 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318220678] [2019-11-07 01:22:41,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 01:22:41,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318220678] [2019-11-07 01:22:41,714 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755681769] [2019-11-07 01:22:41,715 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:41,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:22:41,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:41,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:22:41,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 01:22:41,835 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 01:22:41,877 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154999310] [2019-11-07 01:22:41,880 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:22:41,881 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:41,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:41,881 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:41,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:41,904 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:42,408 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:42,689 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:43,707 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:43,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:43,715 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:44,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:44,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 11] total 23 [2019-11-07 01:22:44,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411958418] [2019-11-07 01:22:44,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:22:44,019 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:44,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:22:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:22:44,020 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 23 states. [2019-11-07 01:22:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:45,292 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2019-11-07 01:22:45,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-07 01:22:45,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2019-11-07 01:22:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:45,295 INFO L225 Difference]: With dead ends: 118 [2019-11-07 01:22:45,295 INFO L226 Difference]: Without dead ends: 85 [2019-11-07 01:22:45,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2019-11-07 01:22:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-07 01:22:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2019-11-07 01:22:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-07 01:22:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2019-11-07 01:22:45,310 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 39 [2019-11-07 01:22:45,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:45,311 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2019-11-07 01:22:45,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:22:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2019-11-07 01:22:45,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-07 01:22:45,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:45,313 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:45,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:45,517 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1999730054, now seen corresponding path program 3 times [2019-11-07 01:22:45,517 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:45,518 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898904587] [2019-11-07 01:22:45,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-07 01:22:45,669 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898904587] [2019-11-07 01:22:45,669 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647794745] [2019-11-07 01:22:45,669 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-07 01:22:45,819 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:22:45,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:45,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:22:45,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-07 01:22:45,845 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-07 01:22:45,920 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106865705] [2019-11-07 01:22:45,922 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:22:45,922 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:45,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:45,923 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:45,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:45,946 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:47,467 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:47,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:47,480 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:47,708 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:47,708 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-11-07 01:22:47,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108311146] [2019-11-07 01:22:47,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-07 01:22:47,711 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:47,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-07 01:22:47,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2019-11-07 01:22:47,712 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 25 states. [2019-11-07 01:22:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:48,772 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2019-11-07 01:22:48,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-07 01:22:48,773 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2019-11-07 01:22:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:48,774 INFO L225 Difference]: With dead ends: 157 [2019-11-07 01:22:48,774 INFO L226 Difference]: Without dead ends: 92 [2019-11-07 01:22:48,779 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2019-11-07 01:22:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-07 01:22:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-11-07 01:22:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:22:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2019-11-07 01:22:48,803 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 72 [2019-11-07 01:22:48,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:48,803 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2019-11-07 01:22:48,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-07 01:22:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2019-11-07 01:22:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-07 01:22:48,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:48,810 INFO L410 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:49,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:49,020 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:49,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1170703852, now seen corresponding path program 4 times [2019-11-07 01:22:49,021 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:49,022 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611346023] [2019-11-07 01:22:49,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-07 01:22:49,298 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611346023] [2019-11-07 01:22:49,298 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470723187] [2019-11-07 01:22:49,298 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:49,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 01:22:49,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-07 01:22:49,440 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-07 01:22:49,730 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935012809] [2019-11-07 01:22:49,733 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:22:49,733 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:49,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:49,735 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:49,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:49,755 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:51,320 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:51,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:51,331 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:51,610 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:51,610 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-11-07 01:22:51,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644666256] [2019-11-07 01:22:51,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-07 01:22:51,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-07 01:22:51,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2019-11-07 01:22:51,614 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 39 states. [2019-11-07 01:22:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:53,125 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2019-11-07 01:22:53,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-07 01:22:53,126 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 79 [2019-11-07 01:22:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:53,128 INFO L225 Difference]: With dead ends: 171 [2019-11-07 01:22:53,128 INFO L226 Difference]: Without dead ends: 106 [2019-11-07 01:22:53,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1244, Invalid=3868, Unknown=0, NotChecked=0, Total=5112 [2019-11-07 01:22:53,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-07 01:22:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2019-11-07 01:22:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-07 01:22:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2019-11-07 01:22:53,144 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 79 [2019-11-07 01:22:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:53,144 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2019-11-07 01:22:53,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-07 01:22:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2019-11-07 01:22:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-07 01:22:53,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:53,146 INFO L410 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:53,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:53,350 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1927430996, now seen corresponding path program 5 times [2019-11-07 01:22:53,351 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:53,351 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74940362] [2019-11-07 01:22:53,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-07 01:22:53,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74940362] [2019-11-07 01:22:53,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231068041] [2019-11-07 01:22:53,863 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:58,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-07 01:22:58,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:58,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-07 01:22:58,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2019-11-07 01:22:58,914 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2019-11-07 01:22:59,074 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733914195] [2019-11-07 01:22:59,075 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:22:59,076 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:59,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:59,076 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:59,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:59,091 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:00,076 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:23:00,680 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:23:00,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:00,701 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:01,131 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:01,131 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 9, 9, 11] total 53 [2019-11-07 01:23:01,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404123156] [2019-11-07 01:23:01,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-07 01:23:01,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:01,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-07 01:23:01,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=2202, Unknown=0, NotChecked=0, Total=2756 [2019-11-07 01:23:01,135 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 53 states. [2019-11-07 01:23:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:04,541 INFO L93 Difference]: Finished difference Result 236 states and 318 transitions. [2019-11-07 01:23:04,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-07 01:23:04,542 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 93 [2019-11-07 01:23:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:04,544 INFO L225 Difference]: With dead ends: 236 [2019-11-07 01:23:04,544 INFO L226 Difference]: Without dead ends: 171 [2019-11-07 01:23:04,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1684, Invalid=8416, Unknown=0, NotChecked=0, Total=10100 [2019-11-07 01:23:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-11-07 01:23:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2019-11-07 01:23:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-07 01:23:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2019-11-07 01:23:04,571 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 93 [2019-11-07 01:23:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:04,571 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2019-11-07 01:23:04,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-07 01:23:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2019-11-07 01:23:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:23:04,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:04,574 INFO L410 BasicCegarLoop]: trace histogram [27, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:04,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:04,781 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:04,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1606878406, now seen corresponding path program 6 times [2019-11-07 01:23:04,783 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:04,784 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352087848] [2019-11-07 01:23:04,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-11-07 01:23:05,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352087848] [2019-11-07 01:23:05,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463440225] [2019-11-07 01:23:05,433 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:05,655 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:23:05,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:23:05,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 01:23:05,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-11-07 01:23:05,694 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-11-07 01:23:06,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2034975479] [2019-11-07 01:23:06,648 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:23:06,649 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:06,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:06,649 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:06,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:06,671 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:07,488 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:23:08,214 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:23:08,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:08,220 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:08,612 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:08,613 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-11-07 01:23:08,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326702267] [2019-11-07 01:23:08,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-11-07 01:23:08,615 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-11-07 01:23:08,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=2952, Unknown=0, NotChecked=0, Total=4692 [2019-11-07 01:23:08,618 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand 69 states. [2019-11-07 01:23:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:12,237 INFO L93 Difference]: Finished difference Result 329 states and 375 transitions. [2019-11-07 01:23:12,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-11-07 01:23:12,238 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 158 [2019-11-07 01:23:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:12,240 INFO L225 Difference]: With dead ends: 329 [2019-11-07 01:23:12,240 INFO L226 Difference]: Without dead ends: 200 [2019-11-07 01:23:12,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5099, Invalid=12193, Unknown=0, NotChecked=0, Total=17292 [2019-11-07 01:23:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-07 01:23:12,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 191. [2019-11-07 01:23:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-07 01:23:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 200 transitions. [2019-11-07 01:23:12,290 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 200 transitions. Word has length 158 [2019-11-07 01:23:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:12,290 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 200 transitions. [2019-11-07 01:23:12,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-11-07 01:23:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 200 transitions. [2019-11-07 01:23:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-07 01:23:12,293 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:12,293 INFO L410 BasicCegarLoop]: trace histogram [56, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:12,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:12,498 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:12,499 INFO L82 PathProgramCache]: Analyzing trace with hash 199264364, now seen corresponding path program 7 times [2019-11-07 01:23:12,499 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:12,499 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112131914] [2019-11-07 01:23:12,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-11-07 01:23:14,082 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112131914] [2019-11-07 01:23:14,082 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678129173] [2019-11-07 01:23:14,082 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:14,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-07 01:23:14,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-11-07 01:23:14,475 INFO L321 TraceCheckSpWp]: Computing backward predicates...