/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/dll2c_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:07:47,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:07:47,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:07:47,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:07:47,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:07:47,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:07:47,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:07:47,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:07:47,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:07:47,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:07:47,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:07:47,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:07:47,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:07:47,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:07:47,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:07:47,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:07:47,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:07:47,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:07:47,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:07:47,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:07:47,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:07:47,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:07:47,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:07:47,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:07:47,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:07:47,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:07:47,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:07:47,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:07:47,797 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 04:07:47,836 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:07:47,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:07:47,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:07:47,837 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:07:47,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:07:47,838 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:07:47,840 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:07:47,840 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:07:47,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:07:47,840 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:07:47,841 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:07:47,841 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:07:47,841 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:07:47,841 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:07:47,842 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:07:47,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:07:47,842 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:07:47,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:07:47,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:07:47,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:07:47,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:07:47,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:07:47,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:07:47,844 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:07:47,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:07:47,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:07:47,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:07:47,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:07:47,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:07:47,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:07:47,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:07:47,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:07:47,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:07:47,846 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:07:47,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:07:47,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:07:47,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:07:47,847 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:07:48,143 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:07:48,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:07:48,164 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:07:48,165 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:07:48,166 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:07:48,166 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i [2019-11-24 04:07:48,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00ebf3971/d05bce2174de438eaa6305611d147f72/FLAGf1745fdf0 [2019-11-24 04:07:48,728 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:07:48,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i [2019-11-24 04:07:48,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00ebf3971/d05bce2174de438eaa6305611d147f72/FLAGf1745fdf0 [2019-11-24 04:07:49,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00ebf3971/d05bce2174de438eaa6305611d147f72 [2019-11-24 04:07:49,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:07:49,032 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:07:49,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:07:49,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:07:49,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:07:49,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f8fc8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49, skipping insertion in model container [2019-11-24 04:07:49,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:07:49,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:07:49,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:07:49,642 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:07:49,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:07:49,754 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:07:49,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49 WrapperNode [2019-11-24 04:07:49,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:07:49,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:07:49,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:07:49,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:07:49,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:07:49,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:07:49,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:07:49,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:07:49,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (1/1) ... [2019-11-24 04:07:49,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:07:49,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:07:49,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:07:49,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:07:49,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (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 04:07:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:07:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:07:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:07:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:07:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:07:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:07:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:07:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:07:49,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:07:50,650 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:07:50,650 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-24 04:07:50,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:07:50 BoogieIcfgContainer [2019-11-24 04:07:50,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:07:50,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:07:50,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:07:50,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:07:50,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:07:49" (1/3) ... [2019-11-24 04:07:50,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8ace39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:07:50, skipping insertion in model container [2019-11-24 04:07:50,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:49" (2/3) ... [2019-11-24 04:07:50,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8ace39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:07:50, skipping insertion in model container [2019-11-24 04:07:50,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:07:50" (3/3) ... [2019-11-24 04:07:50,661 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all_reverse.i [2019-11-24 04:07:50,671 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:07:50,678 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:07:50,690 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:07:50,714 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:07:50,715 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:07:50,715 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:07:50,715 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:07:50,715 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:07:50,716 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:07:50,716 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:07:50,716 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:07:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-24 04:07:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:07:50,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:07:50,739 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:07:50,740 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:07:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:07:50,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1093926042, now seen corresponding path program 1 times [2019-11-24 04:07:50,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:07:50,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613288025] [2019-11-24 04:07:50,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:07:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:07:50,990 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 04:07:50,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613288025] [2019-11-24 04:07:50,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:07:50,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:07:50,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156749112] [2019-11-24 04:07:51,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:07:51,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:07:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:07:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:07:51,026 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-24 04:07:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:07:51,146 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2019-11-24 04:07:51,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:07:51,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-24 04:07:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:07:51,162 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:07:51,162 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:07:51,168 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 04:07:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:07:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-24 04:07:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:07:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-24 04:07:51,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-24 04:07:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:07:51,211 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-24 04:07:51,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:07:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-24 04:07:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:07:51,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:07:51,212 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:07:51,212 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:07:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:07:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1086890104, now seen corresponding path program 1 times [2019-11-24 04:07:51,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:07:51,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073937907] [2019-11-24 04:07:51,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:07:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:07:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:07:51,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073937907] [2019-11-24 04:07:51,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:07:51,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:07:51,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438788219] [2019-11-24 04:07:51,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:07:51,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:07:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:07:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:07:51,377 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-24 04:07:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:07:51,421 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-11-24 04:07:51,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:07:51,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 04:07:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:07:51,422 INFO L225 Difference]: With dead ends: 13 [2019-11-24 04:07:51,422 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:07:51,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:07:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:07:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 04:07:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 04:07:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-24 04:07:51,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-11-24 04:07:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:07:51,427 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-24 04:07:51,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:07:51,427 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-24 04:07:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:07:51,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:07:51,428 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:07:51,428 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:07:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:07:51,428 INFO L82 PathProgramCache]: Analyzing trace with hash 666255606, now seen corresponding path program 1 times [2019-11-24 04:07:51,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:07:51,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196330879] [2019-11-24 04:07:51,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:07:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:07:51,570 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 04:07:51,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196330879] [2019-11-24 04:07:51,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428908039] [2019-11-24 04:07:51,571 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 04:07:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:07:51,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 04:07:51,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:07:51,722 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 04:07:51,723 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:07:51,751 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 04:07:51,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [962970735] [2019-11-24 04:07:51,800 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:07:51,800 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:07:51,807 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:07:51,817 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:07:51,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:07:52,101 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:52,597 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:53,122 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:53,493 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:53,952 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:54,129 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:54,218 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:54,934 WARN L192 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 124 [2019-11-24 04:07:55,584 WARN L192 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 121 [2019-11-24 04:07:55,669 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34