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/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:18,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:18,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:18,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:18,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:18,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:18,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:18,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:18,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:18,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:18,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:18,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:18,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:18,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:18,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:18,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:18,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:18,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:18,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:18,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:18,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:18,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:18,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:18,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:18,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:18,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:31:18,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:31:18,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:31:18,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:31:18,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:31:18,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:31:18,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:31:18,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:31:18,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:18,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:18,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:18,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:31:18,640 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:18,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:18,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:18,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:18,642 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:18,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:18,643 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:18,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:18,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:18,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:18,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:18,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:18,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:18,645 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:18,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:18,645 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:18,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:18,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:18,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:18,646 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:18,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:18,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:18,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:18,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:18,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:18,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:18,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:18,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:18,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:31:18,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:18,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:18,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:18,930 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:18,931 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:18,932 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-10-15 01:31:19,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9554133e/de75140b1bc042e982a0bfeda517b45c/FLAGa24a730fa [2019-10-15 01:31:19,497 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:19,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-10-15 01:31:19,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9554133e/de75140b1bc042e982a0bfeda517b45c/FLAGa24a730fa [2019-10-15 01:31:19,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9554133e/de75140b1bc042e982a0bfeda517b45c [2019-10-15 01:31:19,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:19,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:19,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:19,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:19,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:19,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:19" (1/1) ... [2019-10-15 01:31:19,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e35f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:19, skipping insertion in model container [2019-10-15 01:31:19,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:19" (1/1) ... [2019-10-15 01:31:19,880 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:19,899 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:20,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:20,126 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:20,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:20,246 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:20,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20 WrapperNode [2019-10-15 01:31:20,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:20,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:20,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:20,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:20,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20" (1/1) ... [2019-10-15 01:31:20,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20" (1/1) ... [2019-10-15 01:31:20,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20" (1/1) ... [2019-10-15 01:31:20,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20" (1/1) ... [2019-10-15 01:31:20,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20" (1/1) ... [2019-10-15 01:31:20,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20" (1/1) ... [2019-10-15 01:31:20,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20" (1/1) ... [2019-10-15 01:31:20,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:20,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:20,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:20,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:20,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:20,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:20,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:20,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:20,351 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2019-10-15 01:31:20,351 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2019-10-15 01:31:20,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2019-10-15 01:31:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2019-10-15 01:31:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:20,871 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:20,871 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-15 01:31:20,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:20 BoogieIcfgContainer [2019-10-15 01:31:20,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:20,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:20,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:20,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:20,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:19" (1/3) ... [2019-10-15 01:31:20,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a67c4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:20, skipping insertion in model container [2019-10-15 01:31:20,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:20" (2/3) ... [2019-10-15 01:31:20,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a67c4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:20, skipping insertion in model container [2019-10-15 01:31:20,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:20" (3/3) ... [2019-10-15 01:31:20,881 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2019-10-15 01:31:20,891 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:20,898 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:20,908 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:20,932 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:20,932 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:20,932 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:20,932 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:20,933 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:20,933 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:20,933 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:20,933 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-10-15 01:31:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:31:20,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:20,957 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:20,959 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:20,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1511676476, now seen corresponding path program 1 times [2019-10-15 01:31:20,971 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:20,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764094351] [2019-10-15 01:31:20,971 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:20,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:20,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:21,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764094351] [2019-10-15 01:31:21,140 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:21,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:21,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799079742] [2019-10-15 01:31:21,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:21,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:21,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:21,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:21,158 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2019-10-15 01:31:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:21,233 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2019-10-15 01:31:21,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:21,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:31:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:21,246 INFO L225 Difference]: With dead ends: 88 [2019-10-15 01:31:21,246 INFO L226 Difference]: Without dead ends: 52 [2019-10-15 01:31:21,250 INFO L600 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 [2019-10-15 01:31:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-15 01:31:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2019-10-15 01:31:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:31:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2019-10-15 01:31:21,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 12 [2019-10-15 01:31:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:21,303 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2019-10-15 01:31:21,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2019-10-15 01:31:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:21,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:21,306 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:21,306 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1775930285, now seen corresponding path program 1 times [2019-10-15 01:31:21,307 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:21,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430796285] [2019-10-15 01:31:21,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:21,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:21,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:21,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430796285] [2019-10-15 01:31:21,432 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:21,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:31:21,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575785996] [2019-10-15 01:31:21,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:31:21,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:21,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:31:21,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:31:21,435 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 5 states. [2019-10-15 01:31:21,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:21,514 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2019-10-15 01:31:21,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:21,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-15 01:31:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:21,517 INFO L225 Difference]: With dead ends: 70 [2019-10-15 01:31:21,519 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 01:31:21,521 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:31:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 01:31:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2019-10-15 01:31:21,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-15 01:31:21,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-10-15 01:31:21,537 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 13 [2019-10-15 01:31:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:21,538 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-10-15 01:31:21,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:31:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-10-15 01:31:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:31:21,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:21,544 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:21,544 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:21,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416666, now seen corresponding path program 1 times [2019-10-15 01:31:21,545 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:21,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423381683] [2019-10-15 01:31:21,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:21,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:21,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:21,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423381683] [2019-10-15 01:31:21,628 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:21,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:21,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809670283] [2019-10-15 01:31:21,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:21,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:21,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:21,630 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 3 states. [2019-10-15 01:31:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:21,678 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2019-10-15 01:31:21,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:21,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-15 01:31:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:21,680 INFO L225 Difference]: With dead ends: 76 [2019-10-15 01:31:21,681 INFO L226 Difference]: Without dead ends: 47 [2019-10-15 01:31:21,681 INFO L600 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 [2019-10-15 01:31:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-15 01:31:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-10-15 01:31:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:31:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-10-15 01:31:21,696 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 29 [2019-10-15 01:31:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:21,696 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-10-15 01:31:21,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-10-15 01:31:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:31:21,698 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:21,698 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:21,698 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1697925591, now seen corresponding path program 1 times [2019-10-15 01:31:21,699 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:21,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169348621] [2019-10-15 01:31:21,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:21,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:21,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:21,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169348621] [2019-10-15 01:31:21,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442145166] [2019-10-15 01:31:21,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:21,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:21,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:21,932 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:21,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159174814] [2019-10-15 01:31:22,009 INFO L162 IcfgInterpreter]: Started Sifa with 28 locations of interest [2019-10-15 01:31:22,009 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:22,016 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:22,024 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:22,025 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:22,193 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:26,715 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:31:26,718 INFO L199 IcfgInterpreter]: Interpreting procedure insert with input of size 7 for LOIs [2019-10-15 01:31:26,721 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:26,724 INFO L199 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 42 for LOIs [2019-10-15 01:31:26,732 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:27,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:31:27,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [4, 4, 4] total 24 [2019-10-15 01:31:27,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964821290] [2019-10-15 01:31:27,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-15 01:31:27,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-15 01:31:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:31:27,641 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 20 states. [2019-10-15 01:31:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:29,924 INFO L93 Difference]: Finished difference Result 112 states and 149 transitions. [2019-10-15 01:31:29,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:31:29,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2019-10-15 01:31:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:29,931 INFO L225 Difference]: With dead ends: 112 [2019-10-15 01:31:29,931 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:31:29,936 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=405, Invalid=1757, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:31:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:31:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2019-10-15 01:31:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:31:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2019-10-15 01:31:29,963 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 30 [2019-10-15 01:31:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:29,964 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2019-10-15 01:31:29,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-15 01:31:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2019-10-15 01:31:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:31:29,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:29,966 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:30,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:30,171 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:30,172 INFO L82 PathProgramCache]: Analyzing trace with hash 545937229, now seen corresponding path program 1 times [2019-10-15 01:31:30,172 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:30,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056108937] [2019-10-15 01:31:30,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:30,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:30,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:30,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056108937] [2019-10-15 01:31:30,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395561583] [2019-10-15 01:31:30,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:30,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:30,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:31:30,410 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:31:30,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1159179708] [2019-10-15 01:31:30,446 INFO L162 IcfgInterpreter]: Started Sifa with 28 locations of interest [2019-10-15 01:31:30,449 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:30,450 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:30,450 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:30,450 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:30,474 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:34,041 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:31:34,045 INFO L199 IcfgInterpreter]: Interpreting procedure insert with input of size 7 for LOIs [2019-10-15 01:31:34,050 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:34,053 INFO L199 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 34 for LOIs [2019-10-15 01:31:34,065 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:35,147 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:31:35,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5, 4, 4] total 28 [2019-10-15 01:31:35,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958764742] [2019-10-15 01:31:35,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:31:35,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:35,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:31:35,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:31:35,150 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand 21 states. [2019-10-15 01:31:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:37,493 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2019-10-15 01:31:37,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 01:31:37,494 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2019-10-15 01:31:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:37,496 INFO L225 Difference]: With dead ends: 95 [2019-10-15 01:31:37,496 INFO L226 Difference]: Without dead ends: 81 [2019-10-15 01:31:37,498 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2019-10-15 01:31:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-15 01:31:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2019-10-15 01:31:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-15 01:31:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2019-10-15 01:31:37,510 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 32 [2019-10-15 01:31:37,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:37,510 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2019-10-15 01:31:37,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:31:37,510 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2019-10-15 01:31:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:31:37,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:37,512 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:37,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:37,716 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:37,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:37,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1911824755, now seen corresponding path program 1 times [2019-10-15 01:31:37,718 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:37,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570700038] [2019-10-15 01:31:37,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:37,719 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:37,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:31:37,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570700038] [2019-10-15 01:31:37,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632884760] [2019-10-15 01:31:37,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:37,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:37,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:31:38,000 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:31:38,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175457163] [2019-10-15 01:31:38,032 INFO L162 IcfgInterpreter]: Started Sifa with 29 locations of interest [2019-10-15 01:31:38,032 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:38,033 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:38,034 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:38,034 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:38,051 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:40,625 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:40,630 INFO L199 IcfgInterpreter]: Interpreting procedure insert with input of size 3 for LOIs [2019-10-15 01:31:40,633 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:40,635 INFO L199 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 33 for LOIs [2019-10-15 01:31:40,651 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:44,700 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-10-15 01:31:45,864 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:45,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4, 24] total 32 [2019-10-15 01:31:45,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793707246] [2019-10-15 01:31:45,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:31:45,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:45,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:31:45,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:31:45,867 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 32 states. [2019-10-15 01:31:50,683 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 50 [2019-10-15 01:31:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:51,700 INFO L93 Difference]: Finished difference Result 224 states and 310 transitions. [2019-10-15 01:31:51,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 01:31:51,701 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2019-10-15 01:31:51,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:51,705 INFO L225 Difference]: With dead ends: 224 [2019-10-15 01:31:51,705 INFO L226 Difference]: Without dead ends: 173 [2019-10-15 01:31:51,708 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=828, Invalid=4428, Unknown=0, NotChecked=0, Total=5256 [2019-10-15 01:31:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-10-15 01:31:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 91. [2019-10-15 01:31:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-15 01:31:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2019-10-15 01:31:51,730 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 44 [2019-10-15 01:31:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:51,730 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2019-10-15 01:31:51,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:31:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2019-10-15 01:31:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 01:31:51,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:51,733 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:31:51,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:51,937 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2074771675, now seen corresponding path program 1 times [2019-10-15 01:31:51,938 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:51,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673810763] [2019-10-15 01:31:51,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:51,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:51,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:31:52,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673810763] [2019-10-15 01:31:52,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259833347] [2019-10-15 01:31:52,001 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-10-15 01:31:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:52,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:31:52,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:31:52,319 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:31:52,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638044350] [2019-10-15 01:31:52,395 INFO L162 IcfgInterpreter]: Started Sifa with 29 locations of interest [2019-10-15 01:31:52,395 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:52,395 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:52,396 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:52,396 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:52,419 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs