/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.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:07:39,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:07:39,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:07:39,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:07:39,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:07:39,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:07:39,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:07:39,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:07:39,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:07:39,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:07:39,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:07:39,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:07:39,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:07:39,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:07:39,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:07:39,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:07:39,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:07:39,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:07:39,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:07:39,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:07:39,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:07:39,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:07:39,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:07:39,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:07:39,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:07:39,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:07:39,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:07:39,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:07:39,934 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 04:07:39,948 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:07:39,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:07:39,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:07:39,949 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:07:39,950 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:07:39,950 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:07:39,950 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:07:39,950 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:07:39,950 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:07:39,951 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:07:39,951 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:07:39,951 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:07:39,951 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:07:39,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:07:39,952 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:07:39,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:07:39,952 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:07:39,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:07:39,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:07:39,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:07:39,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:07:39,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:07:39,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:07:39,954 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:07:39,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:07:39,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:07:39,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:07:39,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:07:39,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:07:39,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:07:39,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:07:39,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:07:39,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:07:39,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:07:39,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:07:39,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:07:39,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:07:39,957 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:07:40,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:07:40,235 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:07:40,239 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:07:40,241 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:07:40,241 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:07:40,242 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_remove_all.i [2019-11-24 04:07:40,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67e78701b/d0410e6e178f468eb7bac9df24aa03ae/FLAGa41a6313a [2019-11-24 04:07:40,810 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:07:40,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_remove_all.i [2019-11-24 04:07:40,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67e78701b/d0410e6e178f468eb7bac9df24aa03ae/FLAGa41a6313a [2019-11-24 04:07:41,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67e78701b/d0410e6e178f468eb7bac9df24aa03ae [2019-11-24 04:07:41,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:07:41,125 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:07:41,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:07:41,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:07:41,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:07:41,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ceb8032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41, skipping insertion in model container [2019-11-24 04:07:41,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:07:41,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:07:41,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:07:41,663 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:07:41,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:07:41,782 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:07:41,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41 WrapperNode [2019-11-24 04:07:41,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:07:41,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:07:41,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:07:41,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:07:41,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:07:41,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:07:41,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:07:41,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:07:41,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (1/1) ... [2019-11-24 04:07:41,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:07:41,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:07:41,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:07:41,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:07:41,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (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 04:07:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:07:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:07:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:07:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:07:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:07:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:07:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:07:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:07:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:07:42,723 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:07:42,723 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-24 04:07:42,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:07:42 BoogieIcfgContainer [2019-11-24 04:07:42,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:07:42,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:07:42,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:07:42,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:07:42,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:07:41" (1/3) ... [2019-11-24 04:07:42,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9507ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:07:42, skipping insertion in model container [2019-11-24 04:07:42,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:07:41" (2/3) ... [2019-11-24 04:07:42,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9507ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:07:42, skipping insertion in model container [2019-11-24 04:07:42,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:07:42" (3/3) ... [2019-11-24 04:07:42,739 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all.i [2019-11-24 04:07:42,749 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:07:42,756 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:07:42,768 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:07:42,795 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:07:42,795 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:07:42,796 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:07:42,796 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:07:42,797 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:07:42,797 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:07:42,797 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:07:42,797 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:07:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-24 04:07:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:07:42,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:07:42,818 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:07:42,818 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:07:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:07:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1093926042, now seen corresponding path program 1 times [2019-11-24 04:07:42,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:07:42,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611700001] [2019-11-24 04:07:42,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:07:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:07:43,058 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 04:07:43,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611700001] [2019-11-24 04:07:43,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:07:43,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:07:43,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157400889] [2019-11-24 04:07:43,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:07:43,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:07:43,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:07:43,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:07:43,084 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-24 04:07:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:07:43,181 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2019-11-24 04:07:43,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:07:43,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-24 04:07:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:07:43,194 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:07:43,194 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:07:43,198 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 04:07:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:07:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-24 04:07:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:07:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-24 04:07:43,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-24 04:07:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:07:43,231 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-24 04:07:43,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:07:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-24 04:07:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:07:43,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:07:43,232 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:07:43,233 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:07:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:07:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1086890104, now seen corresponding path program 1 times [2019-11-24 04:07:43,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:07:43,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790439590] [2019-11-24 04:07:43,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:07:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:07:43,369 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 04:07:43,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790439590] [2019-11-24 04:07:43,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:07:43,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:07:43,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407701670] [2019-11-24 04:07:43,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:07:43,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:07:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:07:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:07:43,376 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-24 04:07:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:07:43,408 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-11-24 04:07:43,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:07:43,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 04:07:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:07:43,409 INFO L225 Difference]: With dead ends: 13 [2019-11-24 04:07:43,409 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:07:43,410 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 04:07:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:07:43,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 04:07:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 04:07:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-24 04:07:43,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-11-24 04:07:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:07:43,414 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-24 04:07:43,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:07:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-24 04:07:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:07:43,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:07:43,415 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:07:43,416 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:07:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:07:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash 666255606, now seen corresponding path program 1 times [2019-11-24 04:07:43,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:07:43,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245801603] [2019-11-24 04:07:43,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:07:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:07:43,602 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 04:07:43,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245801603] [2019-11-24 04:07:43,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083405775] [2019-11-24 04:07:43,603 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 04:07:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:07:43,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 04:07:43,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:07:43,776 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 04:07:43,777 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:07:43,801 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 04:07:43,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [206937742] [2019-11-24 04:07:43,841 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:07:43,841 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:07:43,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:07:43,852 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:07:43,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:07:44,035 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:44,514 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:44,946 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:45,342 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:45,783 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2019-11-24 04:07:45,809 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:46,199 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:46,380 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2019-11-24 04:07:46,411 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:47,366 WARN L192 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 117 [2019-11-24 04:07:47,777 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2019-11-24 04:07:47,867 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 25