/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_two_index_05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:27:19,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:27:19,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:27:19,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:27:19,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:27:19,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:27:19,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:27:19,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:27:19,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:27:19,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:27:19,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:27:19,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:27:19,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:27:19,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:27:19,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:27:19,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:27:19,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:27:19,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:27:19,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:27:19,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:27:19,564 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 01:27:19,597 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:27:19,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:27:19,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:27:19,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:27:19,601 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:27:19,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:27:19,601 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:27:19,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:27:19,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:27:19,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:27:19,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:27:19,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:27:19,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:27:19,604 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:27:19,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:27:19,605 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:27:19,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:27:19,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:27:19,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:27:19,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:27:19,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:27:19,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:27:19,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:27:19,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:27:19,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:27:19,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:27:19,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:27:19,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:27:19,608 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 01:27:19,888 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:27:19,900 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:27:19,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:27:19,905 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:27:19,906 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:27:19,906 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-11-07 01:27:19,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beac3f863/03532fc887fb4330bd63c01f0e47e4c5/FLAG6b0475f8c [2019-11-07 01:27:20,479 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:27:20,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-11-07 01:27:20,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beac3f863/03532fc887fb4330bd63c01f0e47e4c5/FLAG6b0475f8c [2019-11-07 01:27:20,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beac3f863/03532fc887fb4330bd63c01f0e47e4c5 [2019-11-07 01:27:20,888 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:27:20,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:27:20,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:27:20,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:27:20,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:27:20,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:20" (1/1) ... [2019-11-07 01:27:20,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f8a51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:20, skipping insertion in model container [2019-11-07 01:27:20,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:20" (1/1) ... [2019-11-07 01:27:20,910 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:27:20,930 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:27:21,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:27:21,123 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:27:21,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:27:21,259 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:27:21,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21 WrapperNode [2019-11-07 01:27:21,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:27:21,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:27:21,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:27:21,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:27:21,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21" (1/1) ... [2019-11-07 01:27:21,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21" (1/1) ... [2019-11-07 01:27:21,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21" (1/1) ... [2019-11-07 01:27:21,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21" (1/1) ... [2019-11-07 01:27:21,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21" (1/1) ... [2019-11-07 01:27:21,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21" (1/1) ... [2019-11-07 01:27:21,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21" (1/1) ... [2019-11-07 01:27:21,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:27:21,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:27:21,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:27:21,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:27:21,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21" (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 01:27:21,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:27:21,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:27:21,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:27:21,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:27:21,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:27:21,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:27:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:27:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:27:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:27:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:27:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:27:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:27:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:27:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:27:21,677 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:27:21,677 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:27:21,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:21 BoogieIcfgContainer [2019-11-07 01:27:21,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:27:21,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:27:21,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:27:21,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:27:21,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:27:20" (1/3) ... [2019-11-07 01:27:21,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bed6c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:21, skipping insertion in model container [2019-11-07 01:27:21,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:21" (2/3) ... [2019-11-07 01:27:21,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bed6c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:21, skipping insertion in model container [2019-11-07 01:27:21,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:21" (3/3) ... [2019-11-07 01:27:21,697 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2019-11-07 01:27:21,714 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:27:21,722 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:27:21,732 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:27:21,755 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:27:21,755 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:27:21,755 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:27:21,755 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:27:21,756 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:27:21,756 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:27:21,756 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:27:21,756 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:27:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 01:27:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:27:21,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:21,776 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:21,779 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-11-07 01:27:21,791 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:21,792 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914396771] [2019-11-07 01:27:21,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:21,963 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 01:27:21,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914396771] [2019-11-07 01:27:21,965 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:27:21,965 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:27:21,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072307644] [2019-11-07 01:27:21,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:27:21,971 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:21,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:27:21,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:27:21,985 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-07 01:27:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:22,035 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-07 01:27:22,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:27:22,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:27:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:22,045 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:27:22,045 INFO L226 Difference]: Without dead ends: 17 [2019-11-07 01:27:22,049 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 01:27:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-07 01:27:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-07 01:27:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 01:27:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-07 01:27:22,084 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-11-07 01:27:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:22,084 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-07 01:27:22,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:27:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-07 01:27:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:27:22,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:22,086 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:22,086 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:22,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1896737256, now seen corresponding path program 1 times [2019-11-07 01:27:22,087 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:22,087 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304212810] [2019-11-07 01:27:22,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:22,150 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 01:27:22,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304212810] [2019-11-07 01:27:22,151 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:27:22,151 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:27:22,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731336837] [2019-11-07 01:27:22,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:27:22,154 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:22,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:27:22,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:27:22,155 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-11-07 01:27:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:22,207 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-11-07 01:27:22,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:27:22,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:27:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:22,211 INFO L225 Difference]: With dead ends: 30 [2019-11-07 01:27:22,211 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:27:22,212 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 01:27:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:27:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-11-07 01:27:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:27:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 01:27:22,222 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-07 01:27:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:22,223 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 01:27:22,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:27:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 01:27:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:27:22,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:22,224 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:22,224 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:22,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-11-07 01:27:22,225 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:22,226 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621857994] [2019-11-07 01:27:22,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:22,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621857994] [2019-11-07 01:27:22,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623532446] [2019-11-07 01:27:22,300 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 01:27:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:22,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:27:22,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:22,448 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:22,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811674713] [2019-11-07 01:27:22,513 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:22,513 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:22,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:22,530 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:22,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:22,658 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:23,045 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-11-07 01:27:23,212 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:23,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:23,227 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:23,523 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:23,523 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:27:23,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059251785] [2019-11-07 01:27:23,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:27:23,526 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:23,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:27:23,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:27:23,527 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-11-07 01:27:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:24,273 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-11-07 01:27:24,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:27:24,274 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-07 01:27:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:24,275 INFO L225 Difference]: With dead ends: 50 [2019-11-07 01:27:24,275 INFO L226 Difference]: Without dead ends: 39 [2019-11-07 01:27:24,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 01:27:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-07 01:27:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-11-07 01:27:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:27:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-07 01:27:24,292 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-11-07 01:27:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:24,293 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-07 01:27:24,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:27:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-07 01:27:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:27:24,295 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:24,295 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:24,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:24,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:24,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1363999975, now seen corresponding path program 2 times [2019-11-07 01:27:24,501 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:24,501 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354235811] [2019-11-07 01:27:24,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:27:24,619 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354235811] [2019-11-07 01:27:24,619 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714669085] [2019-11-07 01:27:24,619 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 01:27:24,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:27:24,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:27:24,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:27:24,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:27:24,698 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:27:24,740 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018492325] [2019-11-07 01:27:24,741 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:24,741 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:24,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:24,742 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:24,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:24,776 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:25,084 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:25,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:25,096 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:25,351 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:25,351 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-11-07 01:27:25,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527572264] [2019-11-07 01:27:25,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 01:27:25,352 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:25,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 01:27:25,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:27:25,353 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2019-11-07 01:27:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:26,423 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-11-07 01:27:26,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:27:26,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-11-07 01:27:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:26,426 INFO L225 Difference]: With dead ends: 73 [2019-11-07 01:27:26,427 INFO L226 Difference]: Without dead ends: 60 [2019-11-07 01:27:26,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2019-11-07 01:27:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-07 01:27:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2019-11-07 01:27:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:27:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-07 01:27:26,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-11-07 01:27:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:26,439 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-07 01:27:26,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 01:27:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-07 01:27:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:27:26,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:26,440 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:26,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:26,646 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:26,646 INFO L82 PathProgramCache]: Analyzing trace with hash 311824988, now seen corresponding path program 3 times [2019-11-07 01:27:26,646 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:26,647 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001502768] [2019-11-07 01:27:26,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:27:26,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001502768] [2019-11-07 01:27:26,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289747937] [2019-11-07 01:27:26,789 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 01:27:26,848 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:27:26,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:27:26,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:27:26,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:27:26,907 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:27:27,042 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541222250] [2019-11-07 01:27:27,044 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:27,044 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:27,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:27,045 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:27,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:27,069 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:27,337 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:27,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:27,349 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:27,605 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:27,605 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 38 [2019-11-07 01:27:27,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394714575] [2019-11-07 01:27:27,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-07 01:27:27,607 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-07 01:27:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 01:27:27,608 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 38 states. [2019-11-07 01:27:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:29,505 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2019-11-07 01:27:29,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-07 01:27:29,506 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 28 [2019-11-07 01:27:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:29,507 INFO L225 Difference]: With dead ends: 109 [2019-11-07 01:27:29,508 INFO L226 Difference]: Without dead ends: 91 [2019-11-07 01:27:29,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1756, Invalid=4886, Unknown=0, NotChecked=0, Total=6642 [2019-11-07 01:27:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-07 01:27:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 52. [2019-11-07 01:27:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-07 01:27:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-11-07 01:27:29,527 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2019-11-07 01:27:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:29,528 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-11-07 01:27:29,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-07 01:27:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-11-07 01:27:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-07 01:27:29,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:29,530 INFO L410 BasicCegarLoop]: trace histogram [25, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:29,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:29,751 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:29,752 INFO L82 PathProgramCache]: Analyzing trace with hash 102164889, now seen corresponding path program 4 times [2019-11-07 01:27:29,752 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:29,752 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180350520] [2019-11-07 01:27:29,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-07 01:27:29,950 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180350520] [2019-11-07 01:27:29,951 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562936028] [2019-11-07 01:27:29,951 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 01:27:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:30,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-07 01:27:30,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:27:30,183 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:27:30,861 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [272776462] [2019-11-07 01:27:30,863 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:30,863 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:30,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:30,864 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:30,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:30,889 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:31,129 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:31,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:31,138 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:31,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:31,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 28, 11] total 72 [2019-11-07 01:27:31,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995833497] [2019-11-07 01:27:31,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-11-07 01:27:31,459 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-11-07 01:27:31,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2038, Invalid=3074, Unknown=0, NotChecked=0, Total=5112 [2019-11-07 01:27:31,463 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 72 states. [2019-11-07 01:27:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:35,995 INFO L93 Difference]: Finished difference Result 172 states and 232 transitions. [2019-11-07 01:27:35,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-11-07 01:27:35,995 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 48 [2019-11-07 01:27:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:35,997 INFO L225 Difference]: With dead ends: 172 [2019-11-07 01:27:35,997 INFO L226 Difference]: Without dead ends: 151 [2019-11-07 01:27:36,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8624 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7326, Invalid=16854, Unknown=0, NotChecked=0, Total=24180 [2019-11-07 01:27:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-07 01:27:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 93. [2019-11-07 01:27:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-07 01:27:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2019-11-07 01:27:36,025 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 48 [2019-11-07 01:27:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:36,025 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2019-11-07 01:27:36,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-11-07 01:27:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2019-11-07 01:27:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-07 01:27:36,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:36,029 INFO L410 BasicCegarLoop]: trace histogram [59, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:36,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:36,233 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:36,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1137625480, now seen corresponding path program 5 times [2019-11-07 01:27:36,234 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:36,234 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301105602] [2019-11-07 01:27:36,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-11-07 01:27:36,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301105602] [2019-11-07 01:27:36,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368084437] [2019-11-07 01:27:36,695 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 01:27:47,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-07 01:27:47,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:27:47,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-07 01:27:47,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-11-07 01:27:47,852 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-11-07 01:27:48,365 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996076788] [2019-11-07 01:27:48,366 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:48,366 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:48,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:48,367 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:48,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:48,394 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:48,645 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:48,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:48,664 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:49,088 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:49,088 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 11] total 51 [2019-11-07 01:27:49,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572765335] [2019-11-07 01:27:49,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-07 01:27:49,093 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:49,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-07 01:27:49,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2019-11-07 01:27:49,100 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 51 states. [2019-11-07 01:27:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:54,543 INFO L93 Difference]: Finished difference Result 240 states and 298 transitions. [2019-11-07 01:27:54,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-11-07 01:27:54,544 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 89 [2019-11-07 01:27:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:54,550 INFO L225 Difference]: With dead ends: 240 [2019-11-07 01:27:54,551 INFO L226 Difference]: Without dead ends: 231 [2019-11-07 01:27:54,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5146, Invalid=12676, Unknown=0, NotChecked=0, Total=17822 [2019-11-07 01:27:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-11-07 01:27:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 113. [2019-11-07 01:27:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-07 01:27:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2019-11-07 01:27:54,590 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 89 [2019-11-07 01:27:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:54,594 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2019-11-07 01:27:54,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-07 01:27:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2019-11-07 01:27:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-07 01:27:54,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:54,596 INFO L410 BasicCegarLoop]: trace histogram [59, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:54,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:54,801 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:54,802 INFO L82 PathProgramCache]: Analyzing trace with hash 854243016, now seen corresponding path program 6 times [2019-11-07 01:27:54,802 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:54,802 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525060623] [2019-11-07 01:27:54,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-11-07 01:27:55,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525060623] [2019-11-07 01:27:55,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461781092] [2019-11-07 01:27:55,821 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 01:27:55,974 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:27:55,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:27:55,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 61 conjunts are in the unsatisfiable core [2019-11-07 01:27:55,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-11-07 01:27:56,442 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-11-07 01:27:59,719 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [459741183] [2019-11-07 01:27:59,720 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:59,721 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:59,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:59,721 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:59,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:59,743 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:59,978 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:59,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:59,984 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:00,441 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:00,441 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 62, 62, 11] total 160 [2019-11-07 01:28:00,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199644746] [2019-11-07 01:28:00,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 160 states [2019-11-07 01:28:00,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:00,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2019-11-07 01:28:00,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11498, Invalid=13942, Unknown=0, NotChecked=0, Total=25440 [2019-11-07 01:28:00,448 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 160 states.