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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:29,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:29,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:29,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:29,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:29,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:29,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:29,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:29,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:30,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:30,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:30,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:30,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:30,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:30,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:30,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:30,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:30,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:30,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:30,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:30,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:30,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:30,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:30,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:30,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:30,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:30,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:30,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:30,046 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 01:31:30,067 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:30,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:30,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:30,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:30,071 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:30,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:30,071 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:30,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:30,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:30,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:30,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:30,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:30,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:30,074 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:30,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:30,075 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:30,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:30,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:30,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:30,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:30,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:30,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:30,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:30,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:30,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:30,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:30,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:30,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:30,078 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 01:31:30,400 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:30,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:30,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:30,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:30,419 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:30,420 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2019-10-15 01:31:30,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/137158ac9/ffd73aba8b0e4a4ca67975edfdba27ab/FLAGb24e3d18a [2019-10-15 01:31:30,952 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:30,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2019-10-15 01:31:30,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/137158ac9/ffd73aba8b0e4a4ca67975edfdba27ab/FLAGb24e3d18a [2019-10-15 01:31:31,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/137158ac9/ffd73aba8b0e4a4ca67975edfdba27ab [2019-10-15 01:31:31,333 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:31,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:31,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:31,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:31,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:31,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:31" (1/1) ... [2019-10-15 01:31:31,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2aae7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31, skipping insertion in model container [2019-10-15 01:31:31,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:31" (1/1) ... [2019-10-15 01:31:31,352 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:31,375 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:31,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:31,593 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:31,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:31,715 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:31,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31 WrapperNode [2019-10-15 01:31:31,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:31,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:31,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:31,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:31,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31" (1/1) ... [2019-10-15 01:31:31,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31" (1/1) ... [2019-10-15 01:31:31,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31" (1/1) ... [2019-10-15 01:31:31,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31" (1/1) ... [2019-10-15 01:31:31,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31" (1/1) ... [2019-10-15 01:31:31,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31" (1/1) ... [2019-10-15 01:31:31,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31" (1/1) ... [2019-10-15 01:31:31,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:31,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:31,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:31,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:31,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31" (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 [2019-10-15 01:31:31,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:31,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:31,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:31,826 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2019-10-15 01:31:31,826 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2019-10-15 01:31:31,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:31,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:31,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:31,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:31,827 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2019-10-15 01:31:31,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:31,827 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2019-10-15 01:31:31,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:31,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:31,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:31,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:31,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:31,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:32,353 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:32,353 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-15 01:31:32,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:32 BoogieIcfgContainer [2019-10-15 01:31:32,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:32,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:32,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:32,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:32,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:31" (1/3) ... [2019-10-15 01:31:32,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a467ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:32, skipping insertion in model container [2019-10-15 01:31:32,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:31" (2/3) ... [2019-10-15 01:31:32,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a467ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:32, skipping insertion in model container [2019-10-15 01:31:32,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:32" (3/3) ... [2019-10-15 01:31:32,362 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2019-10-15 01:31:32,370 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:32,378 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:32,389 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:32,421 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:32,421 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:32,421 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:32,422 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:32,422 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:32,422 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:32,422 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:32,422 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-10-15 01:31:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:31:32,450 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:32,451 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:32,453 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:32,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:32,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1511676476, now seen corresponding path program 1 times [2019-10-15 01:31:32,465 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:32,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855734522] [2019-10-15 01:31:32,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:32,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:32,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:32,632 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 01:31:32,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855734522] [2019-10-15 01:31:32,634 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:32,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:32,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384411088] [2019-10-15 01:31:32,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:32,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:32,653 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2019-10-15 01:31:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:32,754 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2019-10-15 01:31:32,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:32,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:31:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:32,768 INFO L225 Difference]: With dead ends: 88 [2019-10-15 01:31:32,768 INFO L226 Difference]: Without dead ends: 52 [2019-10-15 01:31:32,772 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 01:31:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-15 01:31:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2019-10-15 01:31:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:31:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2019-10-15 01:31:32,823 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 12 [2019-10-15 01:31:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:32,823 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2019-10-15 01:31:32,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2019-10-15 01:31:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:32,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:32,825 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:32,825 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:32,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1775930285, now seen corresponding path program 1 times [2019-10-15 01:31:32,826 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:32,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322650555] [2019-10-15 01:31:32,828 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:32,829 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:32,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:32,949 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 01:31:32,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322650555] [2019-10-15 01:31:32,950 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:32,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:31:32,951 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301164616] [2019-10-15 01:31:32,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:31:32,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:32,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:31:32,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:31:32,954 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 5 states. [2019-10-15 01:31:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:33,004 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2019-10-15 01:31:33,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:33,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-15 01:31:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:33,007 INFO L225 Difference]: With dead ends: 70 [2019-10-15 01:31:33,007 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 01:31:33,008 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 01:31:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 01:31:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2019-10-15 01:31:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-15 01:31:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-10-15 01:31:33,017 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 13 [2019-10-15 01:31:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:33,017 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-10-15 01:31:33,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:31:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-10-15 01:31:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:31:33,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:33,019 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 01:31:33,019 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416666, now seen corresponding path program 1 times [2019-10-15 01:31:33,020 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:33,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437543231] [2019-10-15 01:31:33,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:33,021 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:33,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:33,082 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 01:31:33,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437543231] [2019-10-15 01:31:33,086 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:33,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:33,087 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677590297] [2019-10-15 01:31:33,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:33,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:33,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:33,089 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 3 states. [2019-10-15 01:31:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:33,133 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2019-10-15 01:31:33,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:33,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-15 01:31:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:33,136 INFO L225 Difference]: With dead ends: 76 [2019-10-15 01:31:33,136 INFO L226 Difference]: Without dead ends: 47 [2019-10-15 01:31:33,137 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 01:31:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-15 01:31:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-10-15 01:31:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:31:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-10-15 01:31:33,154 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 29 [2019-10-15 01:31:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:33,155 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-10-15 01:31:33,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-10-15 01:31:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:31:33,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:33,160 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 01:31:33,161 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:33,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1697925591, now seen corresponding path program 1 times [2019-10-15 01:31:33,163 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:33,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119969574] [2019-10-15 01:31:33,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:33,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:33,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:33,278 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 01:31:33,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119969574] [2019-10-15 01:31:33,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343137644] [2019-10-15 01:31:33,279 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 01:31:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:33,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:33,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:33,412 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 01:31:33,412 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:33,451 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 01:31:33,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831426840] [2019-10-15 01:31:33,474 INFO L162 IcfgInterpreter]: Started Sifa with 28 locations of interest [2019-10-15 01:31:33,474 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:33,480 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:33,485 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:33,486 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:33,627 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:38,355 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:31:38,370 INFO L199 IcfgInterpreter]: Interpreting procedure insert with input of size 7 for LOIs [2019-10-15 01:31:38,374 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:38,377 INFO L199 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 42 for LOIs [2019-10-15 01:31:38,385 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:39,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:31:39,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [4, 4, 4] total 24 [2019-10-15 01:31:39,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952445665] [2019-10-15 01:31:39,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-15 01:31:39,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:39,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-15 01:31:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:31:39,269 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 20 states. [2019-10-15 01:31:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:41,415 INFO L93 Difference]: Finished difference Result 112 states and 149 transitions. [2019-10-15 01:31:41,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:31:41,423 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2019-10-15 01:31:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:41,427 INFO L225 Difference]: With dead ends: 112 [2019-10-15 01:31:41,427 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:31:41,428 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=405, Invalid=1757, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:31:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:31:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2019-10-15 01:31:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:31:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2019-10-15 01:31:41,442 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 30 [2019-10-15 01:31:41,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:41,443 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2019-10-15 01:31:41,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-15 01:31:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2019-10-15 01:31:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:31:41,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:41,444 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 01:31:41,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:41,649 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash 545937229, now seen corresponding path program 1 times [2019-10-15 01:31:41,649 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:41,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775046762] [2019-10-15 01:31:41,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:41,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:41,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:41,765 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 01:31:41,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775046762] [2019-10-15 01:31:41,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370938627] [2019-10-15 01:31:41,766 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 01:31:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:41,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:41,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:41,901 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 01:31:41,901 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:41,928 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 01:31:41,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676345903] [2019-10-15 01:31:41,931 INFO L162 IcfgInterpreter]: Started Sifa with 28 locations of interest [2019-10-15 01:31:41,931 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:41,931 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:41,932 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:41,932 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:41,960 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:45,601 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:31:45,604 INFO L199 IcfgInterpreter]: Interpreting procedure insert with input of size 7 for LOIs [2019-10-15 01:31:45,609 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:45,613 INFO L199 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 34 for LOIs [2019-10-15 01:31:45,624 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:46,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:31:46,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5, 4, 4] total 28 [2019-10-15 01:31:46,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123957221] [2019-10-15 01:31:46,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:31:46,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:31:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:31:46,917 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand 21 states. [2019-10-15 01:31:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:49,093 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2019-10-15 01:31:49,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 01:31:49,094 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2019-10-15 01:31:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:49,096 INFO L225 Difference]: With dead ends: 95 [2019-10-15 01:31:49,097 INFO L226 Difference]: Without dead ends: 81 [2019-10-15 01:31:49,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2019-10-15 01:31:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-15 01:31:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2019-10-15 01:31:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-15 01:31:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2019-10-15 01:31:49,110 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 32 [2019-10-15 01:31:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:49,111 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2019-10-15 01:31:49,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:31:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2019-10-15 01:31:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:31:49,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:49,113 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 01:31:49,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:49,327 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:49,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1911824755, now seen corresponding path program 1 times [2019-10-15 01:31:49,329 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:49,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139111115] [2019-10-15 01:31:49,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:31:49,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139111115] [2019-10-15 01:31:49,410 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:49,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:31:49,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386916920] [2019-10-15 01:31:49,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:31:49,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:49,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:31:49,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:49,412 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 4 states. [2019-10-15 01:31:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:49,430 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2019-10-15 01:31:49,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:49,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2019-10-15 01:31:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:49,432 INFO L225 Difference]: With dead ends: 111 [2019-10-15 01:31:49,432 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:31:49,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:31:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-15 01:31:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-15 01:31:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2019-10-15 01:31:49,457 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 44 [2019-10-15 01:31:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:49,458 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2019-10-15 01:31:49,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:31:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2019-10-15 01:31:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:31:49,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:49,463 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:49,466 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:49,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:49,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1980989535, now seen corresponding path program 1 times [2019-10-15 01:31:49,467 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:49,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32161615] [2019-10-15 01:31:49,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:49,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32161615] [2019-10-15 01:31:49,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803201403] [2019-10-15 01:31:49,569 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 01:31:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:49,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:49,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:31:49,759 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:31:49,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1916257211] [2019-10-15 01:31:49,787 INFO L162 IcfgInterpreter]: Started Sifa with 29 locations of interest [2019-10-15 01:31:49,787 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:49,788 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:49,788 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:49,788 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:49,802 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:52,487 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:52,491 INFO L199 IcfgInterpreter]: Interpreting procedure insert with input of size 3 for LOIs [2019-10-15 01:31:52,495 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:52,497 INFO L199 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 33 for LOIs [2019-10-15 01:31:52,520 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:56,554 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-10-15 01:31:56,939 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2019-10-15 01:31:57,907 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:57,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4, 23] total 31 [2019-10-15 01:31:57,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984569891] [2019-10-15 01:31:57,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-15 01:31:57,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:57,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-15 01:31:57,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:31:57,914 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 31 states. [2019-10-15 01:32:02,924 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 50 [2019-10-15 01:32:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:03,793 INFO L93 Difference]: Finished difference Result 231 states and 306 transitions. [2019-10-15 01:32:03,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-15 01:32:03,794 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 45 [2019-10-15 01:32:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:03,797 INFO L225 Difference]: With dead ends: 231 [2019-10-15 01:32:03,797 INFO L226 Difference]: Without dead ends: 170 [2019-10-15 01:32:03,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=804, Invalid=4166, Unknown=0, NotChecked=0, Total=4970 [2019-10-15 01:32:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-15 01:32:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 84. [2019-10-15 01:32:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-15 01:32:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2019-10-15 01:32:03,817 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 45 [2019-10-15 01:32:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:03,817 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2019-10-15 01:32:03,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-15 01:32:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2019-10-15 01:32:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 01:32:03,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:03,820 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 01:32:04,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:04,024 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1595088869, now seen corresponding path program 1 times [2019-10-15 01:32:04,025 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:04,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682799987] [2019-10-15 01:32:04,026 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:04,026 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:04,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:04,110 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 01:32:04,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682799987] [2019-10-15 01:32:04,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822012867] [2019-10-15 01:32:04,111 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 01:32:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:04,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:32:04,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:04,389 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 01:32:04,390 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:04,452 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 01:32:04,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188017231] [2019-10-15 01:32:04,454 INFO L162 IcfgInterpreter]: Started Sifa with 29 locations of interest [2019-10-15 01:32:04,455 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:04,455 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:04,455 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:04,455 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:04,469 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs