/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-properties/list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:05:14,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:05:14,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:05:14,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:05:14,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:05:14,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:05:14,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:05:14,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:05:14,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:05:14,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:05:14,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:05:14,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:05:14,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:05:14,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:05:14,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:05:14,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:05:14,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:05:14,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:05:14,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:05:14,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:05:14,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:05:14,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:05:14,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:05:14,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:05:14,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:05:14,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:05:14,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:05:14,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:05:14,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:05:14,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:05:14,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:05:14,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:05:14,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:05:14,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:05:14,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:05:14,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:05:14,958 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 04:05:14,995 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:05:14,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:05:14,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:05:14,996 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:05:14,996 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:05:14,996 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:05:14,996 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:05:15,000 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:05:15,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:05:15,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:05:15,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:05:15,001 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:05:15,001 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:05:15,001 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:05:15,001 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:05:15,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:05:15,002 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:05:15,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:05:15,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:05:15,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:05:15,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:05:15,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:05:15,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:05:15,005 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:05:15,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:05:15,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:05:15,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:05:15,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:05:15,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:05:15,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:05:15,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:05:15,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:05:15,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:05:15,007 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:05:15,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:05:15,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:05:15,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:05:15,009 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:05:15,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:05:15,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:05:15,323 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:05:15,324 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:05:15,324 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:05:15,325 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-1.i [2019-11-24 04:05:15,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16ef22d3/12fe366a2357462fa07fc223319d2b1d/FLAG378ad2eda [2019-11-24 04:05:15,895 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:05:15,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-1.i [2019-11-24 04:05:15,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16ef22d3/12fe366a2357462fa07fc223319d2b1d/FLAG378ad2eda [2019-11-24 04:05:16,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16ef22d3/12fe366a2357462fa07fc223319d2b1d [2019-11-24 04:05:16,224 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:05:16,225 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:05:16,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:05:16,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:05:16,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:05:16,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623a7446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16, skipping insertion in model container [2019-11-24 04:05:16,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:05:16,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:05:16,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:05:16,724 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:05:16,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:05:16,830 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:05:16,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16 WrapperNode [2019-11-24 04:05:16,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:05:16,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:05:16,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:05:16,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:05:16,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:05:16,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:05:16,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:05:16,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:05:16,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (1/1) ... [2019-11-24 04:05:16,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:05:16,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:05:16,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:05:16,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:05:16,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (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 04:05:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:05:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:05:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:05:16,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:05:16,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:05:16,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:05:16,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:05:17,412 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:05:17,413 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-24 04:05:17,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:05:17 BoogieIcfgContainer [2019-11-24 04:05:17,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:05:17,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:05:17,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:05:17,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:05:17,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:05:16" (1/3) ... [2019-11-24 04:05:17,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cc1bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:05:17, skipping insertion in model container [2019-11-24 04:05:17,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:05:16" (2/3) ... [2019-11-24 04:05:17,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cc1bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:05:17, skipping insertion in model container [2019-11-24 04:05:17,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:05:17" (3/3) ... [2019-11-24 04:05:17,423 INFO L109 eAbstractionObserver]: Analyzing ICFG list-1.i [2019-11-24 04:05:17,432 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:05:17,443 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:05:17,452 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:05:17,472 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:05:17,473 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:05:17,473 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:05:17,473 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:05:17,473 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:05:17,473 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:05:17,474 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:05:17,474 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:05:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-24 04:05:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:05:17,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:05:17,496 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:05:17,496 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:05:17,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:05:17,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1282425306, now seen corresponding path program 1 times [2019-11-24 04:05:17,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:05:17,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059872158] [2019-11-24 04:05:17,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:05:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:17,631 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 04:05:17,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059872158] [2019-11-24 04:05:17,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:05:17,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:05:17,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664880883] [2019-11-24 04:05:17,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:05:17,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:05:17,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:05:17,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:05:17,653 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-11-24 04:05:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:05:17,669 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2019-11-24 04:05:17,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:05:17,670 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-24 04:05:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:05:17,680 INFO L225 Difference]: With dead ends: 37 [2019-11-24 04:05:17,681 INFO L226 Difference]: Without dead ends: 17 [2019-11-24 04:05:17,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:05:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-24 04:05:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-24 04:05:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-24 04:05:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-24 04:05:17,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2019-11-24 04:05:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:05:17,719 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-24 04:05:17,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:05:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-24 04:05:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 04:05:17,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:05:17,720 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:05:17,720 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:05:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:05:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash 994915230, now seen corresponding path program 1 times [2019-11-24 04:05:17,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:05:17,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257907255] [2019-11-24 04:05:17,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:05:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:17,859 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 04:05:17,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257907255] [2019-11-24 04:05:17,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:05:17,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:05:17,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320986588] [2019-11-24 04:05:17,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:05:17,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:05:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:05:17,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:05:17,864 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-24 04:05:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:05:18,000 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-11-24 04:05:18,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:05:18,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-24 04:05:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:05:18,004 INFO L225 Difference]: With dead ends: 40 [2019-11-24 04:05:18,004 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 04:05:18,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:05:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 04:05:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2019-11-24 04:05:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-24 04:05:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-24 04:05:18,013 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-11-24 04:05:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:05:18,013 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-24 04:05:18,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:05:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-24 04:05:18,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:05:18,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:05:18,014 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:05:18,015 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:05:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:05:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1615494695, now seen corresponding path program 1 times [2019-11-24 04:05:18,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:05:18,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559815398] [2019-11-24 04:05:18,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:05:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:05:18,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559815398] [2019-11-24 04:05:18,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:05:18,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:05:18,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026459209] [2019-11-24 04:05:18,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:05:18,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:05:18,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:05:18,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:05:18,126 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2019-11-24 04:05:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:05:18,259 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-11-24 04:05:18,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:05:18,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-24 04:05:18,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:05:18,260 INFO L225 Difference]: With dead ends: 42 [2019-11-24 04:05:18,260 INFO L226 Difference]: Without dead ends: 34 [2019-11-24 04:05:18,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:05:18,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-24 04:05:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2019-11-24 04:05:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-24 04:05:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-11-24 04:05:18,266 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2019-11-24 04:05:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:05:18,266 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-11-24 04:05:18,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:05:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-11-24 04:05:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:05:18,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:05:18,267 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:05:18,268 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:05:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:05:18,268 INFO L82 PathProgramCache]: Analyzing trace with hash -590791719, now seen corresponding path program 1 times [2019-11-24 04:05:18,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:05:18,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93611566] [2019-11-24 04:05:18,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:05:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:05:18,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93611566] [2019-11-24 04:05:18,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:05:18,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:05:18,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608328455] [2019-11-24 04:05:18,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:05:18,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:05:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:05:18,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:05:18,369 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2019-11-24 04:05:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:05:18,459 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-11-24 04:05:18,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:05:18,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-24 04:05:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:05:18,460 INFO L225 Difference]: With dead ends: 42 [2019-11-24 04:05:18,460 INFO L226 Difference]: Without dead ends: 31 [2019-11-24 04:05:18,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:05:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-24 04:05:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2019-11-24 04:05:18,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-24 04:05:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-24 04:05:18,469 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2019-11-24 04:05:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:05:18,469 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-24 04:05:18,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:05:18,469 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-24 04:05:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:05:18,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:05:18,470 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:05:18,470 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:05:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:05:18,472 INFO L82 PathProgramCache]: Analyzing trace with hash -226603951, now seen corresponding path program 1 times [2019-11-24 04:05:18,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:05:18,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509529599] [2019-11-24 04:05:18,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:05:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:05:18,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509529599] [2019-11-24 04:05:18,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348350334] [2019-11-24 04:05:18,654 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 04:05:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:18,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-24 04:05:18,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:05:18,781 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:05:18,782 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-24 04:05:18,783 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:05:18,805 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-11-24 04:05:18,806 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:05:18,806 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:15 [2019-11-24 04:05:18,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:05:18,913 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:05:18,914 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2019-11-24 04:05:18,915 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:05:18,930 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:05:18,930 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2019-11-24 04:05:18,932 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 04:05:18,964 INFO L567 ElimStorePlain]: treesize reduction 30, result has 42.3 percent of original size [2019-11-24 04:05:18,972 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-24 04:05:18,972 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-24 04:05:18,980 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:05:18,981 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:05:18,981 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:18 [2019-11-24 04:05:19,014 INFO L343 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2019-11-24 04:05:19,014 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2019-11-24 04:05:19,015 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:05:19,020 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:05:19,021 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:05:19,021 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2019-11-24 04:05:19,049 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-24 04:05:19,050 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:05:19,057 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:05:19,059 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-24 04:05:19,059 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2019-11-24 04:05:19,113 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2019-11-24 04:05:19,113 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:05:19,124 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:05:19,125 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:05:19,125 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2019-11-24 04:05:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:05:19,130 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:05:19,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:05:19,183 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:05:19,188 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 04:05:19,195 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:05:19,196 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-24 04:05:19,196 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:54, output treesize:22 [2019-11-24 04:05:19,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:05:19,260 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 162 [2019-11-24 04:05:19,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:05:19,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 04:05:19,264 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:05:19,364 INFO L567 ElimStorePlain]: treesize reduction 118, result has 21.9 percent of original size [2019-11-24 04:05:19,365 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-24 04:05:19,366 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:21 [2019-11-24 04:05:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:05:19,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428908039] [2019-11-24 04:05:19,528 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 04:05:19,528 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:05:19,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:05:19,541 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:05:19,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:05:19,721 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:19,883 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:20,070 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:20,637 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:20,797 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:21,070 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:22,184 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:22,319 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:22,356 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:22,954 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:25,154 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:25,169 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:25,301 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:25,317 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:26,005 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:26,020 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:26,788 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97