/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/sll2n_insert_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:12:03,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:12:03,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:12:03,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:12:03,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:12:03,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:12:03,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:12:03,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:12:03,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:12:03,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:12:03,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:12:03,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:12:03,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:12:03,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:12:03,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:12:03,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:12:03,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:12:03,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:12:03,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:12:03,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:12:03,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:12:03,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:12:03,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:12:03,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:12:03,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:12:03,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:12:03,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:12:03,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:12:03,811 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 04:12:03,833 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:12:03,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:12:03,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:12:03,834 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:12:03,835 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:12:03,835 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:12:03,835 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:12:03,835 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:12:03,836 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:12:03,836 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:12:03,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:12:03,837 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:12:03,837 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:12:03,838 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:12:03,838 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:12:03,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:12:03,839 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:12:03,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:12:03,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:12:03,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:12:03,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:12:03,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:12:03,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:12:03,841 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:12:03,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:12:03,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:12:03,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:12:03,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:12:03,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:12:03,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:12:03,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:12:03,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:12:03,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:12:03,844 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:12:03,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:12:03,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:12:03,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:12:03,845 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:12:04,137 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:12:04,158 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:12:04,161 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:12:04,163 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:12:04,163 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:12:04,164 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_insert_equal.i [2019-11-24 04:12:04,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d354cd980/52cb999459f64481aa129538c7952991/FLAG3c8718959 [2019-11-24 04:12:04,779 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:12:04,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_insert_equal.i [2019-11-24 04:12:04,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d354cd980/52cb999459f64481aa129538c7952991/FLAG3c8718959 [2019-11-24 04:12:05,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d354cd980/52cb999459f64481aa129538c7952991 [2019-11-24 04:12:05,019 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:12:05,020 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:12:05,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:12:05,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:12:05,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:12:05,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44740682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05, skipping insertion in model container [2019-11-24 04:12:05,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:12:05,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:12:05,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:12:05,528 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:12:05,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:12:05,636 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:12:05,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05 WrapperNode [2019-11-24 04:12:05,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:12:05,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:12:05,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:12:05,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:12:05,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:12:05,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:12:05,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:12:05,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:12:05,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (1/1) ... [2019-11-24 04:12:05,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:12:05,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:12:05,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:12:05,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:12:05,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (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 04:12:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:12:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:12:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:12:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:12:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:12:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:12:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:12:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:12:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:12:05,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:12:06,453 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:12:06,454 INFO L284 CfgBuilder]: Removed 22 assume(true) statements. [2019-11-24 04:12:06,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:12:06 BoogieIcfgContainer [2019-11-24 04:12:06,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:12:06,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:12:06,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:12:06,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:12:06,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:12:05" (1/3) ... [2019-11-24 04:12:06,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f4f30d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:12:06, skipping insertion in model container [2019-11-24 04:12:06,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:12:05" (2/3) ... [2019-11-24 04:12:06,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f4f30d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:12:06, skipping insertion in model container [2019-11-24 04:12:06,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:12:06" (3/3) ... [2019-11-24 04:12:06,463 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2019-11-24 04:12:06,473 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:12:06,480 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:12:06,492 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:12:06,516 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:12:06,517 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:12:06,517 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:12:06,517 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:12:06,517 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:12:06,517 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:12:06,518 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:12:06,518 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:12:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-24 04:12:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:12:06,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:12:06,539 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:12:06,540 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:12:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:12:06,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2090690271, now seen corresponding path program 1 times [2019-11-24 04:12:06,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:12:06,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198958029] [2019-11-24 04:12:06,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:12:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:06,744 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 04:12:06,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198958029] [2019-11-24 04:12:06,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:12:06,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:12:06,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148932737] [2019-11-24 04:12:06,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:12:06,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:12:06,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:12:06,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:12:06,769 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-24 04:12:06,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:12:06,815 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2019-11-24 04:12:06,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:12:06,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-24 04:12:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:12:06,828 INFO L225 Difference]: With dead ends: 29 [2019-11-24 04:12:06,828 INFO L226 Difference]: Without dead ends: 12 [2019-11-24 04:12:06,832 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 04:12:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-24 04:12:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-11-24 04:12:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:12:06,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2019-11-24 04:12:06,872 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2019-11-24 04:12:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:12:06,873 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2019-11-24 04:12:06,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:12:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2019-11-24 04:12:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:12:06,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:12:06,875 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:12:06,875 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:12:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:12:06,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1834033542, now seen corresponding path program 1 times [2019-11-24 04:12:06,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:12:06,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781074975] [2019-11-24 04:12:06,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:12:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:07,099 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 04:12:07,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781074975] [2019-11-24 04:12:07,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786314948] [2019-11-24 04:12:07,100 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 04:12:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:07,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:12:07,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:12:07,270 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 04:12:07,271 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:12:07,294 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 04:12:07,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361358920] [2019-11-24 04:12:07,326 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 04:12:07,326 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:12:07,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:12:07,365 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:12:07,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:12:07,647 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:08,220 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:08,323 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2019-11-24 04:12:08,603 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2019-11-24 04:12:09,075 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:09,512 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:09,638 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:10,248 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:11,033 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:11,057 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:11,079 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:11,216 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-24 04:12:11,243 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:11,268 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:11,289 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:11,400 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:12,078 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:12,100 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:12,787 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:12,829 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:12,832 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:12:14,193 WARN L192 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 138 DAG size of output: 107 [2019-11-24 04:12:14,816 WARN L192 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 96 [2019-11-24 04:12:15,851 WARN L192 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 123 [2019-11-24 04:12:17,152 WARN L192 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 193 DAG size of output: 153 [2019-11-24 04:12:17,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:12:17,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 3, 3] total 10 [2019-11-24 04:12:17,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155336587] [2019-11-24 04:12:17,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:12:17,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:12:17,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:12:17,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:12:17,160 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 6 states. [2019-11-24 04:12:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:12:17,325 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2019-11-24 04:12:17,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:12:17,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-24 04:12:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:12:17,327 INFO L225 Difference]: With dead ends: 17 [2019-11-24 04:12:17,327 INFO L226 Difference]: Without dead ends: 12 [2019-11-24 04:12:17,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:12:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-24 04:12:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-24 04:12:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-24 04:12:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-24 04:12:17,334 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2019-11-24 04:12:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:12:17,334 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-24 04:12:17,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:12:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-24 04:12:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:12:17,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:12:17,335 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:12:17,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:12:17,536 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:12:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:12:17,537 INFO L82 PathProgramCache]: Analyzing trace with hash 957274681, now seen corresponding path program 1 times [2019-11-24 04:12:17,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:12:17,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001041673] [2019-11-24 04:12:17,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:12:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:12:17,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001041673] [2019-11-24 04:12:17,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81417299] [2019-11-24 04:12:17,628 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 04:12:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:17,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:12:17,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:12:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:12:17,725 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:12:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:12:17,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348035711] [2019-11-24 04:12:17,739 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 04:12:17,739 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:12:17,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:12:17,740 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:12:17,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:12:17,865 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:18,345 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:18,450 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2019-11-24 04:12:18,904 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:19,425 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:19,568 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:20,181 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:20,768 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:20,783 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:20,798 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:20,891 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:20,906 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:20,921 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:21,083 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:21,479 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:21,593 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:22,234 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 240 [2019-11-24 04:12:22,632 WARN L192 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 672 [2019-11-24 04:12:22,877 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 669 [2019-11-24 04:12:23,147 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 666 [2019-11-24 04:12:23,406 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 670 [2019-11-24 04:12:23,644 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 667 [2019-11-24 04:12:24,201 WARN L192 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 671 [2019-11-24 04:12:24,773 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:24,952 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 658 [2019-11-24 04:12:24,985 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:25,134 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 579 [2019-11-24 04:12:25,164 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:25,372 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 557 [2019-11-24 04:12:25,408 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:25,530 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:25,630 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:25,966 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 343 [2019-11-24 04:12:26,390 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 338 [2019-11-24 04:12:26,612 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-24 04:12:26,824 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-11-24 04:12:27,025 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-11-24 04:12:27,810 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:12:28,918 WARN L192 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 138 DAG size of output: 107 [2019-11-24 04:12:29,517 WARN L192 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 88 [2019-11-24 04:12:30,490 WARN L192 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 123 [2019-11-24 04:12:32,741 WARN L192 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 237 DAG size of output: 170 [2019-11-24 04:12:33,081 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 317 [2019-11-24 04:12:33,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:12:33,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2019-11-24 04:12:33,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216998363] [2019-11-24 04:12:33,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 04:12:33,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:12:33,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 04:12:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:12:33,091 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 8 states. [2019-11-24 04:12:34,068 WARN L192 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 156 [2019-11-24 04:12:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:12:34,407 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-11-24 04:12:34,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 04:12:34,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-11-24 04:12:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:12:34,408 INFO L225 Difference]: With dead ends: 17 [2019-11-24 04:12:34,408 INFO L226 Difference]: Without dead ends: 14 [2019-11-24 04:12:34,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-24 04:12:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-24 04:12:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-24 04:12:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-24 04:12:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-24 04:12:34,415 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2019-11-24 04:12:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:12:34,416 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-24 04:12:34,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 04:12:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-24 04:12:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:12:34,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:12:34,417 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:12:34,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:12:34,623 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:12:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:12:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash 818002068, now seen corresponding path program 1 times [2019-11-24 04:12:34,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:12:34,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347332638] [2019-11-24 04:12:34,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:12:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:12:34,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347332638] [2019-11-24 04:12:34,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81721573] [2019-11-24 04:12:34,696 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 04:12:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:34,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:12:34,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:12:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:12:34,780 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:12:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:12:34,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645451721] [2019-11-24 04:12:34,792 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 04:12:34,792 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:12:34,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:12:34,793 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:12:34,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:12:34,875 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:35,107 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:35,453 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:35,912 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:36,006 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:36,429 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:36,781 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:36,796 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:36,812 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:36,902 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:36,918 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:36,931 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:36,975 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:37,398 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:37,530 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:38,053 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 240 [2019-11-24 04:12:38,374 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2019-11-24 04:12:38,765 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 401 [2019-11-24 04:12:38,794 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:38,820 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:40,299 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 374 [2019-11-24 04:12:40,322 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:40,348 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:40,371 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:40,393 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:12:41,261 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-11-24 04:12:41,473 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-11-24 04:12:43,322 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-11-24 04:12:43,475 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-11-24 04:12:44,352 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:12:45,454 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 138 DAG size of output: 107 [2019-11-24 04:12:46,043 WARN L192 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2019-11-24 04:12:46,972 WARN L192 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 123 [2019-11-24 04:12:49,017 WARN L192 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 237 DAG size of output: 163 [2019-11-24 04:12:49,227 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:12:49,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:12:49,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2019-11-24 04:12:49,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697435503] [2019-11-24 04:12:49,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:12:49,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:12:49,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:12:49,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2019-11-24 04:12:49,229 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 5 states. [2019-11-24 04:12:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:12:49,268 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2019-11-24 04:12:49,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:12:49,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-24 04:12:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:12:49,270 INFO L225 Difference]: With dead ends: 26 [2019-11-24 04:12:49,270 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 04:12:49,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2019-11-24 04:12:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 04:12:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 04:12:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 04:12:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-24 04:12:49,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2019-11-24 04:12:49,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:12:49,278 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-24 04:12:49,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:12:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-24 04:12:49,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 04:12:49,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:12:49,279 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:12:49,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:12:49,483 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:12:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:12:49,483 INFO L82 PathProgramCache]: Analyzing trace with hash 184657743, now seen corresponding path program 2 times [2019-11-24 04:12:49,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:12:49,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194132418] [2019-11-24 04:12:49,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:12:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:12:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:12:50,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194132418] [2019-11-24 04:12:50,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141377204] [2019-11-24 04:12:50,079 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:12:50,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-24 04:12:50,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:12:50,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 101 conjunts are in the unsatisfiable core [2019-11-24 04:12:50,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:12:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:12:51,293 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:12:51,572 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-11-24 04:12:51,984 WARN L192 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2019-11-24 04:12:52,217 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2019-11-24 04:12:52,407 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2019-11-24 04:12:52,842 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-11-24 04:12:53,408 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 143