/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_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:08:16,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:08:16,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:08:16,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:08:16,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:08:16,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:08:16,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:08:16,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:08:16,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:08:16,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:08:16,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:08:16,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:08:16,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:08:16,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:08:16,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:08:16,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:08:16,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:08:16,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:08:16,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:08:16,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:08:16,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:08:16,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:08:16,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:08:16,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:08:16,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:08:16,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:08:16,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:08:16,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:08:16,735 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 04:08:16,762 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:08:16,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:08:16,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:08:16,765 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:08:16,765 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:08:16,765 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:08:16,765 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:08:16,766 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:08:16,766 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:08:16,766 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:08:16,767 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:08:16,767 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:08:16,767 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:08:16,768 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:08:16,768 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:08:16,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:08:16,770 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:08:16,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:08:16,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:08:16,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:08:16,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:08:16,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:08:16,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:08:16,771 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:08:16,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:08:16,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:08:16,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:08:16,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:08:16,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:08:16,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:08:16,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:08:16,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:08:16,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:08:16,774 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:08:16,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:08:16,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:08:16,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:08:16,775 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:08:17,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:08:17,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:08:17,129 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:08:17,131 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:08:17,131 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:08:17,132 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_append_equal.i [2019-11-24 04:08:17,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8aa825d7/de428c917f5542dfa00832ed4240d101/FLAG3b697dc28 [2019-11-24 04:08:17,758 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:08:17,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_append_equal.i [2019-11-24 04:08:17,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8aa825d7/de428c917f5542dfa00832ed4240d101/FLAG3b697dc28 [2019-11-24 04:08:18,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8aa825d7/de428c917f5542dfa00832ed4240d101 [2019-11-24 04:08:18,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:08:18,046 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:08:18,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:08:18,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:08:18,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:08:18,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a08bfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18, skipping insertion in model container [2019-11-24 04:08:18,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:08:18,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:08:18,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:08:18,564 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:08:18,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:08:18,699 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:08:18,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18 WrapperNode [2019-11-24 04:08:18,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:08:18,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:08:18,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:08:18,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:08:18,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:08:18,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:08:18,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:08:18,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:08:18,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (1/1) ... [2019-11-24 04:08:18,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:08:18,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:08:18,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:08:18,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:08:18,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (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 04:08:18,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:08:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:08:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:08:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:08:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:08:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:08:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:08:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:08:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:08:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:08:19,656 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:08:19,656 INFO L284 CfgBuilder]: Removed 22 assume(true) statements. [2019-11-24 04:08:19,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:08:19 BoogieIcfgContainer [2019-11-24 04:08:19,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:08:19,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:08:19,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:08:19,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:08:19,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:08:18" (1/3) ... [2019-11-24 04:08:19,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210a3f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:08:19, skipping insertion in model container [2019-11-24 04:08:19,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:18" (2/3) ... [2019-11-24 04:08:19,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210a3f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:08:19, skipping insertion in model container [2019-11-24 04:08:19,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:08:19" (3/3) ... [2019-11-24 04:08:19,666 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2019-11-24 04:08:19,675 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:08:19,683 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:08:19,695 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:08:19,719 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:08:19,719 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:08:19,719 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:08:19,720 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:08:19,720 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:08:19,720 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:08:19,720 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:08:19,721 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:08:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-24 04:08:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:08:19,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:19,743 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:19,744 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1558450765, now seen corresponding path program 1 times [2019-11-24 04:08:19,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:19,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278638361] [2019-11-24 04:08:19,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:19,940 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 04:08:19,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278638361] [2019-11-24 04:08:19,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:08:19,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:08:19,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557168983] [2019-11-24 04:08:19,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:08:19,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:08:19,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:08:19,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:08:19,965 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-24 04:08:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:08:20,044 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2019-11-24 04:08:20,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:08:20,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:08:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:08:20,062 INFO L225 Difference]: With dead ends: 37 [2019-11-24 04:08:20,063 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 04:08:20,070 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 04:08:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 04:08:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-24 04:08:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-24 04:08:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-24 04:08:20,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2019-11-24 04:08:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:08:20,113 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-24 04:08:20,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:08:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2019-11-24 04:08:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:08:20,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:20,114 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:20,114 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:20,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:20,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1722079522, now seen corresponding path program 1 times [2019-11-24 04:08:20,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:20,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840879933] [2019-11-24 04:08:20,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:20,266 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 04:08:20,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840879933] [2019-11-24 04:08:20,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88859143] [2019-11-24 04:08:20,269 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 04:08:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:20,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:08:20,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:08:20,437 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 04:08:20,437 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:08:20,463 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 04:08:20,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937314300] [2019-11-24 04:08:20,490 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 04:08:20,491 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:08:20,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:08:20,503 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:08:20,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:08:20,867 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:21,659 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:21,809 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2019-11-24 04:08:22,604 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:24,891 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:25,027 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:27,048 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:28,109 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:28,154 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:28,511 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:28,778 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:28,787 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:28,800 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:28,802 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:08:30,047 WARN L192 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 148 DAG size of output: 115 [2019-11-24 04:08:30,696 WARN L192 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 102 [2019-11-24 04:08:31,325 WARN L192 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 129 [2019-11-24 04:08:32,132 WARN L192 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 156 [2019-11-24 04:08:32,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:08:32,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2019-11-24 04:08:32,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023953025] [2019-11-24 04:08:32,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:08:32,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:08:32,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:08:32,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:08:32,141 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 6 states. [2019-11-24 04:08:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:08:32,413 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2019-11-24 04:08:32,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:08:32,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-24 04:08:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:08:32,415 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:08:32,416 INFO L226 Difference]: Without dead ends: 15 [2019-11-24 04:08:32,417 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 04:08:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-24 04:08:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-24 04:08:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-24 04:08:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-24 04:08:32,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2019-11-24 04:08:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:08:32,425 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-24 04:08:32,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:08:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-24 04:08:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:08:32,427 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:32,428 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:32,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:08:32,632 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:32,632 INFO L82 PathProgramCache]: Analyzing trace with hash 899050428, now seen corresponding path program 1 times [2019-11-24 04:08:32,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:32,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184119543] [2019-11-24 04:08:32,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:32,727 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 04:08:32,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184119543] [2019-11-24 04:08:32,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919108089] [2019-11-24 04:08:32,728 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 04:08:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:32,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:08:32,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:08:32,813 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 04:08:32,813 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:08:32,820 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 04:08:32,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355510288] [2019-11-24 04:08:32,825 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-24 04:08:32,825 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:08:32,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:08:32,826 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:08:32,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:08:32,938 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:33,638 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:38,815 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:39,726 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:39,864 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:40,853 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:41,391 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:41,461 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:41,982 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:42,304 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:42,395 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:08:43,365 WARN L192 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 120 [2019-11-24 04:08:44,031 WARN L192 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 93 [2019-11-24 04:08:44,634 WARN L192 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 128 [2019-11-24 04:08:45,713 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 199 DAG size of output: 155 [2019-11-24 04:08:46,849 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 204 DAG size of output: 155 [2019-11-24 04:08:48,023 WARN L192 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 213 DAG size of output: 164 [2019-11-24 04:08:48,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:08:48,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2019-11-24 04:08:48,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677504595] [2019-11-24 04:08:48,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 04:08:48,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:08:48,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 04:08:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:08:48,027 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 8 states. [2019-11-24 04:08:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:08:48,278 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2019-11-24 04:08:48,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:08:48,281 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-24 04:08:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:08:48,282 INFO L225 Difference]: With dead ends: 24 [2019-11-24 04:08:48,282 INFO L226 Difference]: Without dead ends: 17 [2019-11-24 04:08:48,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:08:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-24 04:08:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-24 04:08:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-24 04:08:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-24 04:08:48,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2019-11-24 04:08:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:08:48,290 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-24 04:08:48,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 04:08:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-24 04:08:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:08:48,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:48,291 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:48,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:08:48,495 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:48,496 INFO L82 PathProgramCache]: Analyzing trace with hash 252515799, now seen corresponding path program 1 times [2019-11-24 04:08:48,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:48,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570283276] [2019-11-24 04:08:48,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:48,567 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 04:08:48,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570283276] [2019-11-24 04:08:48,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477071479] [2019-11-24 04:08:48,568 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 04:08:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:48,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:08:48,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:08:48,637 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 04:08:48,637 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:08:48,648 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 04:08:48,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451884335] [2019-11-24 04:08:48,650 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-24 04:08:48,650 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:08:48,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:08:48,651 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:08:48,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:08:48,792 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:49,245 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:50,014 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:50,689 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:50,832 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:51,368 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:52,490 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:52,524 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:52,769 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,168 WARN L192 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 413 [2019-11-24 04:08:54,209 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,241 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,268 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,294 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,320 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,351 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,812 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,837 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,868 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,886 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,905 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,931 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,945 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:54,970 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:55,007 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:55,026 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:55,042 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:55,811 WARN L192 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 153 [2019-11-24 04:08:56,215 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 305 [2019-11-24 04:08:56,389 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2019-11-24 04:08:59,446 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 32256 conjuctions. This might take some time...