/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/list-simple/dll2n_append_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:08:17,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:08:17,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:08:17,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:08:17,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:08:17,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:08:17,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:08:17,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:08:17,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:08:17,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:08:17,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:08:17,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:08:17,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:08:17,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:08:17,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:08:17,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:08:17,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:08:17,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:08:17,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:08:17,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:08:17,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:08:17,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:08:17,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:08:17,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:08:17,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:08:17,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:08:17,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:08:17,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:08:17,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:08:17,936 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:08:17,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:08:17,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:08:17,938 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:08:17,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:08:17,938 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:08:17,938 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:08:17,938 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:08:17,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:08:17,939 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:08:17,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:08:17,940 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:08:17,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:08:17,940 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:08:17,940 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:08:17,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:08:17,942 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:08:17,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:08:17,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:08:17,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:08:17,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:08:17,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:08:17,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:08:17,943 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:08:17,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:08:17,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:08:17,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:08:17,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:08:17,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:08:17,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:08:17,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:08:17,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:08:17,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:08:17,945 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:08:17,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:08:17,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:08:17,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:08:17,946 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:08:18,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:08:18,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:08:18,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:08:18,277 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:08:18,277 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:08:18,278 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_append_unequal.i [2019-11-24 04:08:18,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d24ddb6/5d2540b850444facac61355570f90ee4/FLAG61b7a1acb [2019-11-24 04:08:18,919 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:08:18,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_append_unequal.i [2019-11-24 04:08:18,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d24ddb6/5d2540b850444facac61355570f90ee4/FLAG61b7a1acb [2019-11-24 04:08:19,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d24ddb6/5d2540b850444facac61355570f90ee4 [2019-11-24 04:08:19,228 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:08:19,230 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:08:19,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:08:19,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:08:19,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:08:19,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:19,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270f8430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19, skipping insertion in model container [2019-11-24 04:08:19,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:19,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:08:19,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:08:19,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:08:19,783 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:08:19,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:08:19,895 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:08:19,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19 WrapperNode [2019-11-24 04:08:19,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:08:19,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:08:19,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:08:19,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:08:19,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:19,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:19,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:08:19,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:08:19,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:08:19,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:08:19,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:19,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:19,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:19,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:19,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:20,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:20,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... [2019-11-24 04:08:20,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:08:20,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:08:20,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:08:20,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:08:20,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:08:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:08:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:08:20,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:08:20,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:08:20,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:08:20,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:08:20,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:08:20,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:08:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:08:20,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:08:20,773 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:08:20,774 INFO L284 CfgBuilder]: Removed 22 assume(true) statements. [2019-11-24 04:08:20,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:08:20 BoogieIcfgContainer [2019-11-24 04:08:20,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:08:20,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:08:20,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:08:20,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:08:20,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:08:19" (1/3) ... [2019-11-24 04:08:20,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ea778a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:08:20, skipping insertion in model container [2019-11-24 04:08:20,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:19" (2/3) ... [2019-11-24 04:08:20,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ea778a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:08:20, skipping insertion in model container [2019-11-24 04:08:20,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:08:20" (3/3) ... [2019-11-24 04:08:20,784 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2019-11-24 04:08:20,794 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:08:20,802 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:08:20,813 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:08:20,839 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:08:20,839 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:08:20,839 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:08:20,839 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:08:20,841 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:08:20,841 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:08:20,841 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:08:20,841 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:08:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-24 04:08:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:08:20,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:20,872 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:20,872 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:20,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:20,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1764993452, now seen corresponding path program 1 times [2019-11-24 04:08:20,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:20,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951954082] [2019-11-24 04:08:20,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:08:21,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951954082] [2019-11-24 04:08:21,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:08:21,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:08:21,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852005123] [2019-11-24 04:08:21,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:08:21,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:08:21,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:08:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:08:21,076 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-24 04:08:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:08:21,142 INFO L93 Difference]: Finished difference Result 45 states and 69 transitions. [2019-11-24 04:08:21,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:08:21,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:08:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:08:21,158 INFO L225 Difference]: With dead ends: 45 [2019-11-24 04:08:21,160 INFO L226 Difference]: Without dead ends: 20 [2019-11-24 04:08:21,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:08:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-24 04:08:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-24 04:08:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:08:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-24 04:08:21,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2019-11-24 04:08:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:08:21,225 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-24 04:08:21,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:08:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2019-11-24 04:08:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:08:21,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:21,227 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:21,227 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:21,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:21,228 INFO L82 PathProgramCache]: Analyzing trace with hash -626053356, now seen corresponding path program 1 times [2019-11-24 04:08:21,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:21,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228266457] [2019-11-24 04:08:21,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:08:21,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228266457] [2019-11-24 04:08:21,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125716643] [2019-11-24 04:08:21,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:08:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:21,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:08:21,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:08:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:08:21,575 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:08:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:08:21,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305423975] [2019-11-24 04:08:21,629 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 04:08:21,629 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:08:21,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:08:21,642 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:08:21,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:08:22,135 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:23,031 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:23,169 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2019-11-24 04:08:27,202 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:28,454 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:28,561 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:29,520 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:30,456 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:30,496 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:30,846 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:31,099 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:31,116 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:31,123 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:31,125 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:08:32,322 WARN L192 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 148 DAG size of output: 115 [2019-11-24 04:08:32,928 WARN L192 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 102 [2019-11-24 04:08:33,594 WARN L192 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 132 [2019-11-24 04:08:34,411 WARN L192 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 159 [2019-11-24 04:08:34,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:08:34,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2019-11-24 04:08:34,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77731601] [2019-11-24 04:08:34,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:08:34,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:08:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:08:34,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:08:34,418 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 6 states. [2019-11-24 04:08:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:08:34,682 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-24 04:08:34,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:08:34,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-24 04:08:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:08:34,684 INFO L225 Difference]: With dead ends: 29 [2019-11-24 04:08:34,684 INFO L226 Difference]: Without dead ends: 19 [2019-11-24 04:08:34,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:08:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-24 04:08:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-24 04:08:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:08:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-24 04:08:34,692 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-11-24 04:08:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:08:34,693 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-24 04:08:34,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:08:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-24 04:08:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:08:34,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:34,694 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:34,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:08:34,898 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:34,898 INFO L82 PathProgramCache]: Analyzing trace with hash -787512478, now seen corresponding path program 1 times [2019-11-24 04:08:34,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:34,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466619162] [2019-11-24 04:08:34,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:08:34,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466619162] [2019-11-24 04:08:34,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767527264] [2019-11-24 04:08:34,973 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 [2019-11-24 04:08:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:35,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:08:35,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:08:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:08:35,057 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:08:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:08:35,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15398144] [2019-11-24 04:08:35,080 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-24 04:08:35,080 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:08:35,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:08:35,081 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:08:35,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:08:35,186 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:35,765 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:36,344 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:37,905 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:38,011 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:38,458 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:39,754 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:39,795 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:40,064 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:40,534 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:40,643 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:08:41,662 WARN L192 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 146 DAG size of output: 120 [2019-11-24 04:08:42,361 WARN L192 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 93 [2019-11-24 04:08:42,971 WARN L192 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 131 [2019-11-24 04:08:43,768 WARN L192 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 158 [2019-11-24 04:08:44,573 WARN L192 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 158 [2019-11-24 04:08:45,422 WARN L192 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 167 [2019-11-24 04:08:45,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:08:45,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2019-11-24 04:08:45,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362517901] [2019-11-24 04:08:45,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 04:08:45,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:08:45,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 04:08:45,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:08:45,426 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 8 states. [2019-11-24 04:08:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:08:45,701 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-11-24 04:08:45,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:08:45,702 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-24 04:08:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:08:45,703 INFO L225 Difference]: With dead ends: 32 [2019-11-24 04:08:45,703 INFO L226 Difference]: Without dead ends: 21 [2019-11-24 04:08:45,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:08:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-24 04:08:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-24 04:08:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-24 04:08:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2019-11-24 04:08:45,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2019-11-24 04:08:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:08:45,712 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2019-11-24 04:08:45,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 04:08:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2019-11-24 04:08:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:08:45,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:45,713 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:45,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:08:45,917 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:45,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:45,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1350854915, now seen corresponding path program 1 times [2019-11-24 04:08:45,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:45,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190337595] [2019-11-24 04:08:45,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:08:45,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190337595] [2019-11-24 04:08:45,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95436475] [2019-11-24 04:08:45,961 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 [2019-11-24 04:08:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:46,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:08:46,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:08:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:08:46,055 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:08:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:08:46,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82640217] [2019-11-24 04:08:46,069 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-24 04:08:46,069 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:08:46,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:08:46,072 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:08:46,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:08:46,140 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:46,695 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:49,951 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:51,316 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:52,359 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,206 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:55,061 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:55,102 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:55,329 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:57,414 WARN L192 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2019-11-24 04:08:57,444 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,573 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,593 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,622 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,637 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,672 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,687 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,706 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,735 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,763 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,794 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,819 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,834 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,859 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,878 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,892 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,911 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:01,614 WARN L192 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 137 [2019-11-24 04:09:01,845 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-11-24 04:09:02,078 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-11-24 04:09:05,807 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 48960 conjuctions. This might take some time...