./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/SpamAssassin-loop.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 0ad27fb086e75bf8f5b08286d8e766d07abfe44ff39234568924cf55ade7a6d5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:18:15,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:18:15,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:18:15,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:18:15,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:18:15,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:18:15,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:18:15,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:18:15,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:18:15,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:18:15,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:18:15,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:18:15,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:18:15,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:18:15,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:18:15,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:18:15,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:18:15,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:18:15,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:18:15,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:18:15,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:18:15,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:18:15,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:18:15,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:18:15,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:18:15,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:18:15,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:18:15,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:18:15,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:18:15,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:18:15,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:18:15,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:18:15,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:18:15,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:18:15,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:18:15,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:18:15,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:18:15,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:18:15,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:18:15,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:18:15,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:18:15,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:18:16,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:18:16,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:18:16,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:18:16,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:18:16,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:18:16,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:18:16,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:18:16,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:18:16,018 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:18:16,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:18:16,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:18:16,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:18:16,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:18:16,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:18:16,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:18:16,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:18:16,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:18:16,020 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:18:16,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:18:16,020 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:18:16,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:18:16,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:18:16,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:18:16,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:18:16,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:18:16,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:18:16,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:18:16,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:18:16,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:18:16,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:18:16,023 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:18:16,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:18:16,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:18:16,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:18:16,024 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ad27fb086e75bf8f5b08286d8e766d07abfe44ff39234568924cf55ade7a6d5 [2021-12-21 12:18:16,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:18:16,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:18:16,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:18:16,244 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:18:16,245 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:18:16,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i [2021-12-21 12:18:16,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56af115a4/0e9d62263f7745839dd6227f76e275e4/FLAG793acd996 [2021-12-21 12:18:16,713 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:18:16,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i [2021-12-21 12:18:16,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56af115a4/0e9d62263f7745839dd6227f76e275e4/FLAG793acd996 [2021-12-21 12:18:16,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56af115a4/0e9d62263f7745839dd6227f76e275e4 [2021-12-21 12:18:16,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:18:16,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:18:16,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:18:16,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:18:16,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:18:16,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:16,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c6a5c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16, skipping insertion in model container [2021-12-21 12:18:16,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:16,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:18:16,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:18:16,919 WARN L230 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/SpamAssassin-loop.i[893,906] [2021-12-21 12:18:16,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:18:16,946 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:18:16,960 WARN L230 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/SpamAssassin-loop.i[893,906] [2021-12-21 12:18:16,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:18:16,991 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:18:16,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16 WrapperNode [2021-12-21 12:18:16,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:18:16,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:18:16,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:18:16,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:18:16,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,018 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2021-12-21 12:18:17,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:18:17,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:18:17,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:18:17,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:18:17,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:18:17,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:18:17,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:18:17,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:18:17,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (1/1) ... [2021-12-21 12:18:17,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:18:17,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:18:17,071 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) [2021-12-21 12:18:17,073 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 [2021-12-21 12:18:17,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:18:17,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:18:17,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:18:17,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:18:17,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:18:17,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:18:17,147 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:18:17,148 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:18:17,336 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:18:17,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:18:17,341 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 12:18:17,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:18:17 BoogieIcfgContainer [2021-12-21 12:18:17,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:18:17,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:18:17,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:18:17,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:18:17,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:18:16" (1/3) ... [2021-12-21 12:18:17,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7391cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:18:17, skipping insertion in model container [2021-12-21 12:18:17,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:18:16" (2/3) ... [2021-12-21 12:18:17,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7391cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:18:17, skipping insertion in model container [2021-12-21 12:18:17,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:18:17" (3/3) ... [2021-12-21 12:18:17,362 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2021-12-21 12:18:17,366 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:18:17,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:18:17,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:18:17,452 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-21 12:18:17,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:18:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-21 12:18:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 12:18:17,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:18:17,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:18:17,501 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:18:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:18:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -667640892, now seen corresponding path program 1 times [2021-12-21 12:18:17,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:18:17,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032368098] [2021-12-21 12:18:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:18:17,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:18:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:18:17,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:18:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032368098] [2021-12-21 12:18:17,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032368098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:18:17,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:18:17,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 12:18:17,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030008477] [2021-12-21 12:18:17,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:18:17,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:18:17,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:18:17,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:18:17,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:18:17,831 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:18:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:18:17,962 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2021-12-21 12:18:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:18:17,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 12:18:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:18:17,979 INFO L225 Difference]: With dead ends: 79 [2021-12-21 12:18:17,980 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 12:18:17,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:18:17,989 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:18:17,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 155 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:18:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 12:18:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-12-21 12:18:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-21 12:18:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2021-12-21 12:18:18,048 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 10 [2021-12-21 12:18:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:18:18,048 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2021-12-21 12:18:18,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:18:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2021-12-21 12:18:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 12:18:18,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:18:18,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:18:18,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:18:18,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:18:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:18:18,055 INFO L85 PathProgramCache]: Analyzing trace with hash -689596859, now seen corresponding path program 1 times [2021-12-21 12:18:18,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:18:18,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951803798] [2021-12-21 12:18:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:18:18,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:18:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:18:18,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:18:18,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951803798] [2021-12-21 12:18:18,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951803798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:18:18,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:18:18,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 12:18:18,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985271201] [2021-12-21 12:18:18,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:18:18,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:18:18,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:18:18,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:18:18,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:18:18,134 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:18:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:18:18,193 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-12-21 12:18:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:18:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 12:18:18,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:18:18,195 INFO L225 Difference]: With dead ends: 53 [2021-12-21 12:18:18,195 INFO L226 Difference]: Without dead ends: 51 [2021-12-21 12:18:18,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:18:18,197 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 7 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:18:18,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 182 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:18:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-21 12:18:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-12-21 12:18:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-21 12:18:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2021-12-21 12:18:18,209 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 10 [2021-12-21 12:18:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:18:18,210 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2021-12-21 12:18:18,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:18:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2021-12-21 12:18:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 12:18:18,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:18:18,211 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:18:18,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:18:18,211 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:18:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:18:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 214778336, now seen corresponding path program 1 times [2021-12-21 12:18:18,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:18:18,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347051636] [2021-12-21 12:18:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:18:18,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:18:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 12:18:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:18:18,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:18:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347051636] [2021-12-21 12:18:18,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347051636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:18:18,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:18:18,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 12:18:18,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597663176] [2021-12-21 12:18:18,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:18:18,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:18:18,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:18:18,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:18:18,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:18:18,265 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:18:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:18:18,322 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2021-12-21 12:18:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:18:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-21 12:18:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:18:18,324 INFO L225 Difference]: With dead ends: 53 [2021-12-21 12:18:18,324 INFO L226 Difference]: Without dead ends: 51 [2021-12-21 12:18:18,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:18:18,326 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:18:18,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:18:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-21 12:18:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-21 12:18:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 17 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-21 12:18:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-12-21 12:18:18,341 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 15 [2021-12-21 12:18:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:18:18,341 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-12-21 12:18:18,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:18:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-12-21 12:18:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 12:18:18,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:18:18,343 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:18:18,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:18:18,344 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:18:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:18:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1804674308, now seen corresponding path program 1 times [2021-12-21 12:18:18,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:18:18,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438486364] [2021-12-21 12:18:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:18:18,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:18:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 12:18:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:18:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:18:18,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:18:18,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438486364] [2021-12-21 12:18:18,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438486364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:18:18,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:18:18,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:18:18,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638114374] [2021-12-21 12:18:18,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:18:18,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:18:18,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:18:18,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:18:18,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:18:18,412 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 12:18:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:18:18,495 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2021-12-21 12:18:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:18:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-12-21 12:18:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:18:18,497 INFO L225 Difference]: With dead ends: 57 [2021-12-21 12:18:18,497 INFO L226 Difference]: Without dead ends: 55 [2021-12-21 12:18:18,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:18:18,498 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:18:18,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 164 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:18:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-21 12:18:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-21 12:18:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-21 12:18:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-12-21 12:18:18,508 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 20 [2021-12-21 12:18:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:18:18,509 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-12-21 12:18:18,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 12:18:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-12-21 12:18:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 12:18:18,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:18:18,510 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:18:18,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 12:18:18,511 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:18:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:18:18,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1749987360, now seen corresponding path program 1 times [2021-12-21 12:18:18,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:18:18,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641818229] [2021-12-21 12:18:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:18:18,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:18:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 12:18:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:18:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 12:18:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 12:18:18,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:18:18,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641818229] [2021-12-21 12:18:18,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641818229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:18:18,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:18:18,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 12:18:18,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599368221] [2021-12-21 12:18:18,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:18:18,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:18:18,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:18:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:18:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:18:18,565 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 12:18:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:18:18,614 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-12-21 12:18:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:18:18,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-12-21 12:18:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:18:18,616 INFO L225 Difference]: With dead ends: 62 [2021-12-21 12:18:18,616 INFO L226 Difference]: Without dead ends: 60 [2021-12-21 12:18:18,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:18:18,617 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:18:18,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 133 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:18:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-21 12:18:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-12-21 12:18:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-21 12:18:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-12-21 12:18:18,627 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 25 [2021-12-21 12:18:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:18:18,627 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-12-21 12:18:18,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 12:18:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-12-21 12:18:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 12:18:18,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:18:18,629 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:18:18,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 12:18:18,630 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:18:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:18:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash 158999923, now seen corresponding path program 1 times [2021-12-21 12:18:18,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:18:18,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034937296] [2021-12-21 12:18:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:18:18,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:18:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 12:18:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:18:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 12:18:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 12:18:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 12:18:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 12:18:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 12:18:18,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:18:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034937296] [2021-12-21 12:18:18,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034937296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:18:18,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:18:18,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:18:18,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997578909] [2021-12-21 12:18:18,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:18:18,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:18:18,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:18:18,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:18:18,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:18:18,744 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 12:18:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:18:18,845 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2021-12-21 12:18:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:18:18,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2021-12-21 12:18:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:18:18,851 INFO L225 Difference]: With dead ends: 71 [2021-12-21 12:18:18,851 INFO L226 Difference]: Without dead ends: 69 [2021-12-21 12:18:18,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:18:18,853 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:18:18,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 171 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:18:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-21 12:18:18,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-12-21 12:18:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-21 12:18:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-21 12:18:18,876 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 43 [2021-12-21 12:18:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:18:18,876 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-21 12:18:18,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 12:18:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-21 12:18:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 12:18:18,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:18:18,878 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:18:18,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 12:18:18,879 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:18:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:18:18,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1329631219, now seen corresponding path program 1 times [2021-12-21 12:18:18,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:18:18,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144097112] [2021-12-21 12:18:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:18:18,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:18:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 12:18:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:18:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 12:18:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:18,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 12:18:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 12:18:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 12:18:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 12:18:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 12:18:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-21 12:18:19,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:18:19,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144097112] [2021-12-21 12:18:19,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144097112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:18:19,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:18:19,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 12:18:19,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985731876] [2021-12-21 12:18:19,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:18:19,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:18:19,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:18:19,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:18:19,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:18:19,031 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 12:18:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:18:19,142 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-12-21 12:18:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 12:18:19,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 53 [2021-12-21 12:18:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:18:19,145 INFO L225 Difference]: With dead ends: 71 [2021-12-21 12:18:19,145 INFO L226 Difference]: Without dead ends: 69 [2021-12-21 12:18:19,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:18:19,148 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:18:19,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 161 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:18:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-21 12:18:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-12-21 12:18:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-21 12:18:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-21 12:18:19,166 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 53 [2021-12-21 12:18:19,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:18:19,168 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-21 12:18:19,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 12:18:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-21 12:18:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 12:18:19,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:18:19,173 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:18:19,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 12:18:19,174 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:18:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:18:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1418667265, now seen corresponding path program 1 times [2021-12-21 12:18:19,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:18:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142982095] [2021-12-21 12:18:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:18:19,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:18:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 12:18:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:18:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 12:18:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 12:18:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 12:18:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 12:18:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 12:18:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 12:18:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 12:18:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 12:18:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:18:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-21 12:18:19,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:18:19,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142982095] [2021-12-21 12:18:19,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142982095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:18:19,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:18:19,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 12:18:19,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722998899] [2021-12-21 12:18:19,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:18:19,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:18:19,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:18:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:18:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:18:19,274 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 12:18:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:18:19,420 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-12-21 12:18:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 12:18:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2021-12-21 12:18:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:18:19,421 INFO L225 Difference]: With dead ends: 69 [2021-12-21 12:18:19,421 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 12:18:19,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:18:19,422 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:18:19,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 188 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:18:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 12:18:19,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 12:18:19,423 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) [2021-12-21 12:18:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 12:18:19,423 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2021-12-21 12:18:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:18:19,423 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 12:18:19,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 12:18:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 12:18:19,423 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 12:18:19,426 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:18:19,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 12:18:19,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-21 12:18:19,715 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 64) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,715 INFO L858 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-12-21 12:18:19,715 INFO L858 garLoopResultBuilder]: For program point L60(line 60) no Hoare annotation was computed. [2021-12-21 12:18:19,716 INFO L854 garLoopResultBuilder]: At program point L56(lines 36 63) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,716 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (<= (+ 3 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,716 INFO L854 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (<= (+ 3 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,716 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,716 INFO L854 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (and (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,716 INFO L854 garLoopResultBuilder]: At program point L40-1(line 40) the Hoare annotation is: (and (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,716 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 63) no Hoare annotation was computed. [2021-12-21 12:18:19,716 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-21 12:18:19,716 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-21 12:18:19,716 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-21 12:18:19,716 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,717 INFO L858 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2021-12-21 12:18:19,717 INFO L858 garLoopResultBuilder]: For program point L49(line 49) no Hoare annotation was computed. [2021-12-21 12:18:19,717 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,717 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,717 INFO L854 garLoopResultBuilder]: At program point L37-1(line 37) the Hoare annotation is: (and (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,717 INFO L861 garLoopResultBuilder]: At program point L66(lines 24 67) the Hoare annotation is: true [2021-12-21 12:18:19,717 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-21 12:18:19,717 INFO L854 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,717 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,717 INFO L854 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,718 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,718 INFO L858 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2021-12-21 12:18:19,718 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 65) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,718 INFO L858 garLoopResultBuilder]: For program point L34-3(lines 34 65) no Hoare annotation was computed. [2021-12-21 12:18:19,718 INFO L854 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ 5 |ULTIMATE.start_main_~j~0#1|) |ULTIMATE.start_main_~bufsize~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,718 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|) (<= (+ |ULTIMATE.start_main_~limit~0#1| 4) |ULTIMATE.start_main_~bufsize~0#1|)) [2021-12-21 12:18:19,718 INFO L858 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2021-12-21 12:18:19,718 INFO L858 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2021-12-21 12:18:19,718 INFO L858 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-12-21 12:18:19,718 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-12-21 12:18:19,718 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-12-21 12:18:19,718 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-12-21 12:18:19,719 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-12-21 12:18:19,719 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-12-21 12:18:19,721 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:18:19,722 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:18:19,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:18:19 BoogieIcfgContainer [2021-12-21 12:18:19,734 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:18:19,734 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:18:19,734 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:18:19,734 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:18:19,735 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:18:17" (3/4) ... [2021-12-21 12:18:19,737 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-21 12:18:19,742 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-21 12:18:19,745 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-12-21 12:18:19,745 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-21 12:18:19,745 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-21 12:18:19,745 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-21 12:18:19,777 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 12:18:19,778 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:18:19,778 INFO L158 Benchmark]: Toolchain (without parser) took 3038.18ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 78.7MB in the beginning and 87.0MB in the end (delta: -8.3MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2021-12-21 12:18:19,778 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 81.8MB. Free memory is still 43.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:18:19,779 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.07ms. Allocated memory is still 109.1MB. Free memory was 78.4MB in the beginning and 85.4MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:18:19,779 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.48ms. Allocated memory is still 109.1MB. Free memory was 85.4MB in the beginning and 83.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:18:19,779 INFO L158 Benchmark]: Boogie Preprocessor took 16.14ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 82.8MB in the end (delta: 861.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:18:19,780 INFO L158 Benchmark]: RCFGBuilder took 319.77ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 72.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:18:19,780 INFO L158 Benchmark]: TraceAbstraction took 2377.28ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 71.6MB in the beginning and 90.1MB in the end (delta: -18.6MB). Peak memory consumption was 42.8MB. Max. memory is 16.1GB. [2021-12-21 12:18:19,780 INFO L158 Benchmark]: Witness Printer took 43.25ms. Allocated memory is still 132.1MB. Free memory was 90.1MB in the beginning and 87.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:18:19,782 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 81.8MB. Free memory is still 43.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.07ms. Allocated memory is still 109.1MB. Free memory was 78.4MB in the beginning and 85.4MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.48ms. Allocated memory is still 109.1MB. Free memory was 85.4MB in the beginning and 83.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.14ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 82.8MB in the end (delta: 861.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 319.77ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 72.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2377.28ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 71.6MB in the beginning and 90.1MB in the end (delta: -18.6MB). Peak memory consumption was 42.8MB. Max. memory is 16.1GB. * Witness Printer took 43.25ms. Allocated memory is still 132.1MB. Free memory was 90.1MB in the beginning and 87.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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 2 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 172 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 104 mSDsluCounter, 1277 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 907 mSDsCounter, 138 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 517 IncrementalHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 138 mSolverCounterUnsat, 370 mSDtfsCounter, 517 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=7, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 20 LocationsWithAnnotation, 52 PreInvPairs, 74 NumberOfFragments, 365 HoareAnnotationTreeSize, 52 FomulaSimplifications, 170 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 20 FomulaSimplificationsInter, 532 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 232 ConstructedInterpolants, 0 QuantifiedInterpolants, 512 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 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: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((i + 1 <= len && 0 <= j) && 5 + j <= bufsize) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize RESULT: Ultimate proved your program to be correct! [2021-12-21 12:18:19,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE