./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/nested9.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/nested9.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b0874b2316aff3266709463f0d72702527bf3a82 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:41:21,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:41:21,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:41:21,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:41:21,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:41:21,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:41:21,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:41:21,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:41:21,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:41:21,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:41:21,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:41:21,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:41:21,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:41:21,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:41:21,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:41:21,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:41:21,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:41:21,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:41:21,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:41:21,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:41:21,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:41:21,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:41:21,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:41:21,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:41:21,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:41:21,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:41:21,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:41:21,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:41:21,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:41:21,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:41:21,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:41:21,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:41:21,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:41:21,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:41:22,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:41:22,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:41:22,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:41:22,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:41:22,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:41:22,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:41:22,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:41:22,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:41:22,035 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:41:22,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:41:22,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:41:22,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:41:22,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:41:22,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:41:22,038 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:41:22,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:41:22,039 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:41:22,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:41:22,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:41:22,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:41:22,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:41:22,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:41:22,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:41:22,040 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:41:22,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:41:22,040 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:41:22,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:41:22,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:41:22,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:41:22,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:41:22,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:41:22,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:41:22,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:41:22,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:41:22,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:41:22,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:41:22,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:41:22,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:41:22,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0874b2316aff3266709463f0d72702527bf3a82 [2021-08-26 03:41:22,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:41:22,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:41:22,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:41:22,303 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:41:22,304 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:41:22,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested9.i [2021-08-26 03:41:22,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2b4098d/5ad563a7e6524ddab9e8a1997edc7cc6/FLAGdd0e2559d [2021-08-26 03:41:22,670 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:41:22,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested9.i [2021-08-26 03:41:22,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2b4098d/5ad563a7e6524ddab9e8a1997edc7cc6/FLAGdd0e2559d [2021-08-26 03:41:22,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2b4098d/5ad563a7e6524ddab9e8a1997edc7cc6 [2021-08-26 03:41:22,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:41:22,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:41:22,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:41:22,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:41:22,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:41:22,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@212490c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22, skipping insertion in model container [2021-08-26 03:41:22,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:41:22,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:41:22,824 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2021-08-26 03:41:22,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:41:22,847 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:41:22,861 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2021-08-26 03:41:22,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:41:22,885 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:41:22,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22 WrapperNode [2021-08-26 03:41:22,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:41:22,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:41:22,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:41:22,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:41:22,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:41:22,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:41:22,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:41:22,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:41:22,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:41:22,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:41:22,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:41:22,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:41:22,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (1/1) ... [2021-08-26 03:41:22,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:41:22,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:41:22,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 03:41:23,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 03:41:23,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:41:23,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:41:23,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:41:23,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:41:23,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:41:23,253 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 03:41:23,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:41:23 BoogieIcfgContainer [2021-08-26 03:41:23,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:41:23,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:41:23,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:41:23,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:41:23,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:41:22" (1/3) ... [2021-08-26 03:41:23,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b03c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:41:23, skipping insertion in model container [2021-08-26 03:41:23,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:22" (2/3) ... [2021-08-26 03:41:23,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b03c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:41:23, skipping insertion in model container [2021-08-26 03:41:23,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:41:23" (3/3) ... [2021-08-26 03:41:23,263 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2021-08-26 03:41:23,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:41:23,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:41:23,299 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:41:23,312 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 03:41:23,313 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:41:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 03:41:23,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:41:23,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:41:23,327 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:41:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:41:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash -331449283, now seen corresponding path program 1 times [2021-08-26 03:41:23,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:41:23,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320699936] [2021-08-26 03:41:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:23,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:41:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:41:23,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:41:23,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320699936] [2021-08-26 03:41:23,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320699936] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:41:23,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:41:23,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 03:41:23,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095110603] [2021-08-26 03:41:23,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:41:23,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:41:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:41:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:41:23,604 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:41:23,807 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-08-26 03:41:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 03:41:23,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 03:41:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:41:23,817 INFO L225 Difference]: With dead ends: 67 [2021-08-26 03:41:23,817 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 03:41:23,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:41:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 03:41:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2021-08-26 03:41:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-08-26 03:41:23,846 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 12 [2021-08-26 03:41:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:41:23,846 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-08-26 03:41:23,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-08-26 03:41:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 03:41:23,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:41:23,847 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:41:23,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:41:23,847 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:41:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:41:23,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1296087111, now seen corresponding path program 1 times [2021-08-26 03:41:23,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:41:23,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541901064] [2021-08-26 03:41:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:23,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:41:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:41:23,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:41:23,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541901064] [2021-08-26 03:41:23,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541901064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:41:23,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549725820] [2021-08-26 03:41:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:23,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:41:23,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:41:23,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:41:23,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:41:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:24,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:41:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:41:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:41:24,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549725820] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:41:24,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:41:24,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-08-26 03:41:24,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220451706] [2021-08-26 03:41:24,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 03:41:24,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:41:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 03:41:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:41:24,319 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:41:24,460 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-08-26 03:41:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:41:24,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 03:41:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:41:24,463 INFO L225 Difference]: With dead ends: 44 [2021-08-26 03:41:24,464 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 03:41:24,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-26 03:41:24,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 03:41:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 18. [2021-08-26 03:41:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-08-26 03:41:24,476 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2021-08-26 03:41:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:41:24,476 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-08-26 03:41:24,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-08-26 03:41:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 03:41:24,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:41:24,477 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:41:24,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 03:41:24,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:41:24,678 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:41:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:41:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash -70902445, now seen corresponding path program 1 times [2021-08-26 03:41:24,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:41:24,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044413268] [2021-08-26 03:41:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:24,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:41:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:41:24,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:41:24,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044413268] [2021-08-26 03:41:24,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044413268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:41:24,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659218500] [2021-08-26 03:41:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:24,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:41:24,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:41:24,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:41:24,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:41:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:24,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 03:41:24,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:41:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 03:41:24,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659218500] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:41:24,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:41:24,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-08-26 03:41:24,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985595189] [2021-08-26 03:41:24,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:41:24,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:41:24,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:41:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:41:24,881 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:41:24,916 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-08-26 03:41:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:41:24,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 03:41:24,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:41:24,917 INFO L225 Difference]: With dead ends: 32 [2021-08-26 03:41:24,918 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 03:41:24,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:41:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 03:41:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-08-26 03:41:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-08-26 03:41:24,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-08-26 03:41:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:41:24,927 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-08-26 03:41:24,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-08-26 03:41:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 03:41:24,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:41:24,928 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:41:24,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:41:25,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 03:41:25,133 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:41:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:41:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash 29741143, now seen corresponding path program 1 times [2021-08-26 03:41:25,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:41:25,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765512882] [2021-08-26 03:41:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:25,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:41:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:41:25,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:41:25,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765512882] [2021-08-26 03:41:25,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765512882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:41:25,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133799459] [2021-08-26 03:41:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:25,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:41:25,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:41:25,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:41:25,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:41:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:41:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:41:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:41:25,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133799459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:41:25,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:41:25,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-26 03:41:25,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196106473] [2021-08-26 03:41:25,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 03:41:25,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:41:25,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 03:41:25,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:41:25,403 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:41:25,544 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-08-26 03:41:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 03:41:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 03:41:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:41:25,547 INFO L225 Difference]: With dead ends: 46 [2021-08-26 03:41:25,547 INFO L226 Difference]: Without dead ends: 35 [2021-08-26 03:41:25,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-26 03:41:25,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-26 03:41:25,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-08-26 03:41:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-08-26 03:41:25,560 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-08-26 03:41:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:41:25,561 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-08-26 03:41:25,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-08-26 03:41:25,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 03:41:25,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:41:25,562 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:41:25,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:41:25,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:41:25,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:41:25,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:41:25,779 INFO L82 PathProgramCache]: Analyzing trace with hash 48602575, now seen corresponding path program 1 times [2021-08-26 03:41:25,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:41:25,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461816800] [2021-08-26 03:41:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:25,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:41:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 03:41:25,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:41:25,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461816800] [2021-08-26 03:41:25,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461816800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:41:25,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41310158] [2021-08-26 03:41:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:25,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:41:25,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:41:25,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:41:25,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:41:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 03:41:25,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:41:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:41:26,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41310158] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:41:26,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:41:26,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-08-26 03:41:26,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573000043] [2021-08-26 03:41:26,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:41:26,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:41:26,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:41:26,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:41:26,058 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:26,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:41:26,098 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-08-26 03:41:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:41:26,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 03:41:26,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:41:26,100 INFO L225 Difference]: With dead ends: 48 [2021-08-26 03:41:26,100 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 03:41:26,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:41:26,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 03:41:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-08-26 03:41:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-08-26 03:41:26,108 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2021-08-26 03:41:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:41:26,108 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-08-26 03:41:26,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-08-26 03:41:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 03:41:26,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:41:26,113 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:41:26,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:41:26,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:41:26,329 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:41:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:41:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash 67888881, now seen corresponding path program 2 times [2021-08-26 03:41:26,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:41:26,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385588882] [2021-08-26 03:41:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:41:26,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:41:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:41:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:41:26,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:41:26,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385588882] [2021-08-26 03:41:26,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385588882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:41:26,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146837246] [2021-08-26 03:41:26,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:41:26,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:41:26,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:41:26,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:41:26,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:41:26,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 03:41:26,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:41:26,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:41:26,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:41:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:41:26,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146837246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:41:26,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:41:26,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-26 03:41:26,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698365027] [2021-08-26 03:41:26,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:41:26,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:41:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:41:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:41:26,625 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:41:26,730 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-08-26 03:41:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:41:26,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-26 03:41:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:41:26,738 INFO L225 Difference]: With dead ends: 49 [2021-08-26 03:41:26,738 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:41:26,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-26 03:41:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:41:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:41:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:41:26,739 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-08-26 03:41:26,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:41:26,739 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:41:26,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:41:26,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:41:26,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:41:26,741 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:41:26,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:41:26,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:41:26,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:41:26,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:41:26,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:41:26,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:41:26,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:41:26,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:41:26,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:41:27,149 INFO L857 garLoopResultBuilder]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2021-08-26 03:41:27,149 INFO L853 garLoopResultBuilder]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse0 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse1 (<= .cse2 ULTIMATE.start_main_~j~0))) (or (and .cse0 (= ULTIMATE.start_main_~i~0 0) .cse1 (<= ULTIMATE.start_main_~j~0 .cse2)) (and (<= ULTIMATE.start_main_~i~0 1) .cse0 (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)) .cse1) (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~i~0) .cse0 .cse1)))) [2021-08-26 03:41:27,149 INFO L857 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L853 garLoopResultBuilder]: At program point L36-2(lines 36 37) the Hoare annotation is: (let ((.cse0 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse1 (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) (.cse2 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0))) (or (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 .cse1 .cse2) (and (<= ULTIMATE.start_main_~i~0 1) (<= (div (* ULTIMATE.start_main_~j~0 (- 1)) (- 2)) ULTIMATE.start_main_~k~0) .cse0 .cse1 (<= ULTIMATE.start_main_~k~0 (div ULTIMATE.start_main_~j~0 2)) .cse2))) [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point L33-1(line 33) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L860 garLoopResultBuilder]: At program point L38(lines 25 40) the Hoare annotation is: true [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2021-08-26 03:41:27,150 INFO L853 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~i~0))) (or (and (<= ULTIMATE.start_main_~i~0 1) .cse0 (<= ULTIMATE.start_main_~j~0 (* 2 ULTIMATE.start_main_~i~0))) (and (<= 2 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (= ULTIMATE.start_main_~i~0 0))) [2021-08-26 03:41:27,150 INFO L857 garLoopResultBuilder]: For program point L30(line 30) no Hoare annotation was computed. [2021-08-26 03:41:27,151 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-26 03:41:27,151 INFO L853 garLoopResultBuilder]: At program point L18-2(lines 1 40) the Hoare annotation is: (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)) (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) [2021-08-26 03:41:27,151 INFO L860 garLoopResultBuilder]: At program point L39(lines 25 40) the Hoare annotation is: true [2021-08-26 03:41:27,154 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:41:27,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:41:27 BoogieIcfgContainer [2021-08-26 03:41:27,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:41:27,163 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:41:27,163 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:41:27,164 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:41:27,164 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:41:23" (3/4) ... [2021-08-26 03:41:27,166 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:41:27,171 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-26 03:41:27,171 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:41:27,171 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:41:27,172 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:41:27,208 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:41:27,208 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:41:27,209 INFO L168 Benchmark]: Toolchain (without parser) took 4520.01 ms. Allocated memory was 54.5 MB in the beginning and 100.7 MB in the end (delta: 46.1 MB). Free memory was 31.8 MB in the beginning and 65.1 MB in the end (delta: -33.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:41:27,209 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 54.5 MB. Free memory was 36.6 MB in the beginning and 36.5 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:41:27,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 197.82 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 31.6 MB in the beginning and 53.7 MB in the end (delta: -22.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-08-26 03:41:27,210 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.35 ms. Allocated memory is still 69.2 MB. Free memory was 53.5 MB in the beginning and 51.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:41:27,210 INFO L168 Benchmark]: Boogie Preprocessor took 33.19 ms. Allocated memory is still 69.2 MB. Free memory was 51.9 MB in the beginning and 50.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:41:27,210 INFO L168 Benchmark]: RCFGBuilder took 298.91 ms. Allocated memory is still 69.2 MB. Free memory was 50.9 MB in the beginning and 37.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:41:27,211 INFO L168 Benchmark]: TraceAbstraction took 3904.16 ms. Allocated memory was 69.2 MB in the beginning and 100.7 MB in the end (delta: 31.5 MB). Free memory was 52.4 MB in the beginning and 67.2 MB in the end (delta: -14.7 MB). Peak memory consumption was 56.8 MB. Max. memory is 16.1 GB. [2021-08-26 03:41:27,211 INFO L168 Benchmark]: Witness Printer took 44.68 ms. Allocated memory is still 100.7 MB. Free memory was 67.2 MB in the beginning and 65.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:41:27,212 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 54.5 MB. Free memory was 36.6 MB in the beginning and 36.5 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 197.82 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 31.6 MB in the beginning and 53.7 MB in the end (delta: -22.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.35 ms. Allocated memory is still 69.2 MB. Free memory was 53.5 MB in the beginning and 51.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.19 ms. Allocated memory is still 69.2 MB. Free memory was 51.9 MB in the beginning and 50.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 298.91 ms. Allocated memory is still 69.2 MB. Free memory was 50.9 MB in the beginning and 37.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3904.16 ms. Allocated memory was 69.2 MB in the beginning and 100.7 MB in the end (delta: 31.5 MB). Free memory was 52.4 MB in the beginning and 67.2 MB in the end (delta: -14.7 MB). Peak memory consumption was 56.8 MB. Max. memory is 16.1 GB. * Witness Printer took 44.68 ms. Allocated memory is still 100.7 MB. Free memory was 67.2 MB in the beginning and 65.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3855.5ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 9.5ms, AutomataDifference: 711.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 203.9ms, InitialAbstractionConstructionTime: 6.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 93 SDtfs, 168 SDslu, 199 SDs, 0 SdLazy, 323 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 267.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 521.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=4, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 27 NumberOfFragments, 142 HoareAnnotationTreeSize, 6 FomulaSimplifications, 1321 FormulaSimplificationTreeSizeReduction, 52.2ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 109 FormulaSimplificationTreeSizeReductionInter, 146.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 48.2ms SsaConstructionTime, 155.8ms SatisfiabilityAnalysisTime, 1243.6ms InterpolantComputationTime, 210 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 199 ConstructedInterpolants, 0 QuantifiedInterpolants, 631 SizeOfPredicates, 17 NumberOfNonLiveVariables, 364 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 56/84 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((1 <= cond && i < n) && j < 3 * i) && 2 * i <= j - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((i < n && i == 0) && 2 * i <= j) && j <= 2 * i) || (((i <= 1 && i < n) && j < 3 * i) && 2 * i <= j)) || (((1 <= cond && 1 <= i) && i < n) && 2 * i <= j) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((1 <= cond && i < n) && j < 3 * i) && 2 * i <= j) || (((((i <= 1 && j * -1 / -2 <= k) && i < n) && j < 3 * i) && k <= j / 2) && 2 * i <= j) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((i <= 1 && 1 <= i) && j <= 2 * i) || ((2 <= n && 1 <= cond) && 1 <= i)) || i == 0 RESULT: Ultimate proved your program to be correct! [2021-08-26 03:41:27,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...