/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_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:22:29,997 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:22:30,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:22:30,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:22:30,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:22:30,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:22:30,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:22:30,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:22:30,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:22:30,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:22:30,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:22:30,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:22:30,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:22:30,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:22:30,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:22:30,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:22:30,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:22:30,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:22:30,085 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 01:22:30,100 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:22:30,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:22:30,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:22:30,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:22:30,102 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:22:30,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:22:30,102 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:22:30,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:22:30,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:22:30,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:22:30,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:22:30,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:22:30,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:22:30,103 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:22:30,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:22:30,104 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:22:30,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:22:30,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:22:30,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:22:30,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:22:30,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:22:30,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:22:30,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:22:30,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:22:30,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:22:30,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:22:30,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:22:30,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:22:30,106 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 01:22:30,422 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:22:30,447 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:22:30,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:22:30,452 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:22:30,453 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:22:30,454 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2019-11-07 01:22:30,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be8d6066/09fd87da1ff64a1c886fb0eed2df349f/FLAGbed6add6f [2019-11-07 01:22:31,017 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:22:31,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2019-11-07 01:22:31,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be8d6066/09fd87da1ff64a1c886fb0eed2df349f/FLAGbed6add6f [2019-11-07 01:22:31,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be8d6066/09fd87da1ff64a1c886fb0eed2df349f [2019-11-07 01:22:31,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:22:31,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:22:31,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:22:31,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:22:31,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:22:31,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:31" (1/1) ... [2019-11-07 01:22:31,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc64ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31, skipping insertion in model container [2019-11-07 01:22:31,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:31" (1/1) ... [2019-11-07 01:22:31,426 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:22:31,463 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:22:31,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:22:31,664 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:22:31,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:22:31,717 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:22:31,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31 WrapperNode [2019-11-07 01:22:31,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:22:31,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:22:31,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:22:31,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:22:31,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31" (1/1) ... [2019-11-07 01:22:31,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31" (1/1) ... [2019-11-07 01:22:31,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31" (1/1) ... [2019-11-07 01:22:31,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31" (1/1) ... [2019-11-07 01:22:31,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31" (1/1) ... [2019-11-07 01:22:31,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31" (1/1) ... [2019-11-07 01:22:31,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31" (1/1) ... [2019-11-07 01:22:31,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:22:31,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:22:31,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:22:31,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:22:31,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31" (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 01:22:31,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:22:31,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:22:31,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:22:31,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:22:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:22:31,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:22:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:22:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:22:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:22:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:22:31,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:22:31,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:22:31,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:22:31,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:22:32,477 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:22:32,478 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-07 01:22:32,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:32 BoogieIcfgContainer [2019-11-07 01:22:32,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:22:32,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:22:32,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:22:32,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:22:32,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:22:31" (1/3) ... [2019-11-07 01:22:32,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fddc8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:32, skipping insertion in model container [2019-11-07 01:22:32,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:31" (2/3) ... [2019-11-07 01:22:32,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fddc8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:32, skipping insertion in model container [2019-11-07 01:22:32,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:32" (3/3) ... [2019-11-07 01:22:32,493 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2019-11-07 01:22:32,502 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:22:32,511 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:22:32,523 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:22:32,551 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:22:32,551 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:22:32,552 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:22:32,552 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:22:32,552 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:22:32,552 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:22:32,553 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:22:32,553 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:22:32,567 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-07 01:22:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:22:32,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:32,574 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:32,576 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1960828359, now seen corresponding path program 1 times [2019-11-07 01:22:32,588 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:32,589 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488222313] [2019-11-07 01:22:32,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:32,789 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 01:22:32,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488222313] [2019-11-07 01:22:32,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:22:32,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:22:32,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532959200] [2019-11-07 01:22:32,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:22:32,798 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:32,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:22:32,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:22:32,816 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-11-07 01:22:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:32,856 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2019-11-07 01:22:32,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:22:32,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-07 01:22:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:32,866 INFO L225 Difference]: With dead ends: 45 [2019-11-07 01:22:32,866 INFO L226 Difference]: Without dead ends: 23 [2019-11-07 01:22:32,869 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 01:22:32,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-07 01:22:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-07 01:22:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-07 01:22:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-07 01:22:32,905 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 18 [2019-11-07 01:22:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:32,905 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-07 01:22:32,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:22:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-07 01:22:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 01:22:32,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:32,907 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 01:22:32,907 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:32,908 INFO L82 PathProgramCache]: Analyzing trace with hash 204960146, now seen corresponding path program 1 times [2019-11-07 01:22:32,908 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:32,909 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256829878] [2019-11-07 01:22:32,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:32,982 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 01:22:32,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256829878] [2019-11-07 01:22:32,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:22:32,987 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:22:32,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79738676] [2019-11-07 01:22:32,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:22:32,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:32,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:22:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:22:32,991 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2019-11-07 01:22:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:33,040 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2019-11-07 01:22:33,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:22:33,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-07 01:22:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:33,042 INFO L225 Difference]: With dead ends: 45 [2019-11-07 01:22:33,042 INFO L226 Difference]: Without dead ends: 30 [2019-11-07 01:22:33,043 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 01:22:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-07 01:22:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-07 01:22:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-07 01:22:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-07 01:22:33,052 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2019-11-07 01:22:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:33,052 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-07 01:22:33,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:22:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-07 01:22:33,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 01:22:33,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:33,057 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] [2019-11-07 01:22:33,057 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:33,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1587201211, now seen corresponding path program 1 times [2019-11-07 01:22:33,058 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:33,059 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594440381] [2019-11-07 01:22:33,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:22:33,211 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594440381] [2019-11-07 01:22:33,212 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952143445] [2019-11-07 01:22:33,212 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 01:22:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:33,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:22:33,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:22:33,344 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:22:33,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033407668] [2019-11-07 01:22:33,431 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:22:33,432 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:33,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:33,445 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:33,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:33,577 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:34,029 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:22:34,593 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:35,097 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:22:35,592 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:35,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:35,605 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:35,964 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:35,964 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:22:35,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592384398] [2019-11-07 01:22:35,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:22:35,966 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:35,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:22:35,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:22:35,967 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 18 states. [2019-11-07 01:22:36,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:36,789 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2019-11-07 01:22:36,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:22:36,791 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2019-11-07 01:22:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:36,792 INFO L225 Difference]: With dead ends: 72 [2019-11-07 01:22:36,792 INFO L226 Difference]: Without dead ends: 49 [2019-11-07 01:22:36,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 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 01:22:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-07 01:22:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2019-11-07 01:22:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-07 01:22:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-07 01:22:36,814 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2019-11-07 01:22:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:36,814 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-07 01:22:36,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:22:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-07 01:22:36,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-07 01:22:36,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:36,817 INFO L410 BasicCegarLoop]: trace histogram [4, 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] [2019-11-07 01:22:37,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:37,030 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:37,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1965201305, now seen corresponding path program 2 times [2019-11-07 01:22:37,031 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:37,031 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573121050] [2019-11-07 01:22:37,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 01:22:37,235 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573121050] [2019-11-07 01:22:37,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116570209] [2019-11-07 01:22:37,236 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 01:22:37,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:22:37,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:37,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:22:37,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 01:22:37,369 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 01:22:37,408 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117014331] [2019-11-07 01:22:37,414 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:22:37,414 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:37,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:37,415 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:37,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:37,453 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:38,932 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:38,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:38,940 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:39,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:39,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 19 [2019-11-07 01:22:39,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866746851] [2019-11-07 01:22:39,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-07 01:22:39,189 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:39,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-07 01:22:39,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-11-07 01:22:39,190 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 19 states. [2019-11-07 01:22:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:40,120 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2019-11-07 01:22:40,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:22:40,123 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2019-11-07 01:22:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:40,125 INFO L225 Difference]: With dead ends: 104 [2019-11-07 01:22:40,125 INFO L226 Difference]: Without dead ends: 77 [2019-11-07 01:22:40,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-11-07 01:22:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-07 01:22:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2019-11-07 01:22:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-07 01:22:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-11-07 01:22:40,153 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 36 [2019-11-07 01:22:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:40,153 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-11-07 01:22:40,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-07 01:22:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-11-07 01:22:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-07 01:22:40,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:40,159 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:40,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:40,367 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:40,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:40,368 INFO L82 PathProgramCache]: Analyzing trace with hash -412271143, now seen corresponding path program 3 times [2019-11-07 01:22:40,369 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:40,369 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138133666] [2019-11-07 01:22:40,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-07 01:22:40,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138133666] [2019-11-07 01:22:40,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166963155] [2019-11-07 01:22:40,728 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 01:22:40,862 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:22:40,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:22:40,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:22:40,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-07 01:22:40,937 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-07 01:22:41,027 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101287975] [2019-11-07 01:22:41,029 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:22:41,029 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:41,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:41,030 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:41,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:41,055 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:42,485 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:42,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:42,491 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:42,793 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:42,794 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7, 11] total 29 [2019-11-07 01:22:42,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860951957] [2019-11-07 01:22:42,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 01:22:42,796 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:42,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 01:22:42,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2019-11-07 01:22:42,797 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 29 states. [2019-11-07 01:22:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:44,265 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2019-11-07 01:22:44,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-07 01:22:44,266 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2019-11-07 01:22:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:44,267 INFO L225 Difference]: With dead ends: 148 [2019-11-07 01:22:44,267 INFO L226 Difference]: Without dead ends: 90 [2019-11-07 01:22:44,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=2358, Unknown=0, NotChecked=0, Total=2756 [2019-11-07 01:22:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-07 01:22:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2019-11-07 01:22:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-07 01:22:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2019-11-07 01:22:44,283 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 64 [2019-11-07 01:22:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:44,283 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2019-11-07 01:22:44,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 01:22:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2019-11-07 01:22:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:22:44,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:44,285 INFO L410 BasicCegarLoop]: trace histogram [10, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:44,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:44,488 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1445740364, now seen corresponding path program 4 times [2019-11-07 01:22:44,489 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:44,489 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526330269] [2019-11-07 01:22:44,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-07 01:22:44,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526330269] [2019-11-07 01:22:44,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272645448] [2019-11-07 01:22:44,848 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 01:22:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:44,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:22:44,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:22:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-07 01:22:45,004 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-07 01:22:45,209 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373004897] [2019-11-07 01:22:45,210 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:22:45,211 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:45,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:45,211 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:45,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:45,232 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:45,884 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:22:46,738 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:46,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:46,744 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:47,068 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:47,069 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-11-07 01:22:47,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631695143] [2019-11-07 01:22:47,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:22:47,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:47,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:22:47,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:22:47,073 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 35 states. [2019-11-07 01:22:48,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:48,333 INFO L93 Difference]: Finished difference Result 167 states and 194 transitions. [2019-11-07 01:22:48,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:22:48,334 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2019-11-07 01:22:48,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:48,335 INFO L225 Difference]: With dead ends: 167 [2019-11-07 01:22:48,335 INFO L226 Difference]: Without dead ends: 102 [2019-11-07 01:22:48,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=934, Invalid=3098, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:22:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-07 01:22:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2019-11-07 01:22:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-07 01:22:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2019-11-07 01:22:48,351 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 77 [2019-11-07 01:22:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:48,351 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2019-11-07 01:22:48,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:22:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2019-11-07 01:22:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-07 01:22:48,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:48,353 INFO L410 BasicCegarLoop]: trace histogram [22, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:48,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:48,565 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash 210288116, now seen corresponding path program 5 times [2019-11-07 01:22:48,566 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:48,566 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647811582] [2019-11-07 01:22:48,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-07 01:22:49,069 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647811582] [2019-11-07 01:22:49,069 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429032741] [2019-11-07 01:22:49,069 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 01:23:06,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-07 01:23:06,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:23:06,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 01:23:06,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2019-11-07 01:23:06,264 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2019-11-07 01:23:06,461 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000546300] [2019-11-07 01:23:06,463 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:23:06,463 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:06,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:06,464 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:06,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:06,482 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:07,869 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:23:07,908 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:23:07,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:07,915 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:08,340 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:08,340 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10, 10, 11] total 51 [2019-11-07 01:23:08,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329404825] [2019-11-07 01:23:08,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-07 01:23:08,342 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:08,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-07 01:23:08,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2069, Unknown=0, NotChecked=0, Total=2550 [2019-11-07 01:23:08,343 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand 51 states. [2019-11-07 01:23:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:11,950 INFO L93 Difference]: Finished difference Result 231 states and 310 transitions. [2019-11-07 01:23:11,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-07 01:23:11,951 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 89 [2019-11-07 01:23:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:11,953 INFO L225 Difference]: With dead ends: 231 [2019-11-07 01:23:11,953 INFO L226 Difference]: Without dead ends: 166 [2019-11-07 01:23:11,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1469, Invalid=7843, Unknown=0, NotChecked=0, Total=9312 [2019-11-07 01:23:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-11-07 01:23:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2019-11-07 01:23:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-07 01:23:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 165 transitions. [2019-11-07 01:23:11,977 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 165 transitions. Word has length 89 [2019-11-07 01:23:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:11,977 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 165 transitions. [2019-11-07 01:23:11,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-07 01:23:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 165 transitions. [2019-11-07 01:23:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 01:23:11,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:11,980 INFO L410 BasicCegarLoop]: trace histogram [23, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:12,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:12,193 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1540306482, now seen corresponding path program 6 times [2019-11-07 01:23:12,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:12,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732798547] [2019-11-07 01:23:12,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2019-11-07 01:23:12,814 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732798547] [2019-11-07 01:23:12,814 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714144442] [2019-11-07 01:23:12,815 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 01:23:13,016 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:23:13,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:23:13,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-07 01:23:13,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2019-11-07 01:23:13,057 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2019-11-07 01:23:13,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [736343283] [2019-11-07 01:23:13,908 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:23:13,908 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:13,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:13,909 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:13,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:13,928 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:14,166 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41