./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aa86be9eb0317030839433587db2b1c5b5e93d6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aa86be9eb0317030839433587db2b1c5b5e93d6 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Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 18:01:25,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 18:01:25,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 18:01:25,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 18:01:25,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 18:01:25,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 18:01:25,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 18:01:26,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 18:01:26,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 18:01:26,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 18:01:26,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 18:01:26,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 18:01:26,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 18:01:26,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 18:01:26,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 18:01:26,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 18:01:26,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 18:01:26,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 18:01:26,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 18:01:26,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 18:01:26,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 18:01:26,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 18:01:26,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 18:01:26,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 18:01:26,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 18:01:26,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 18:01:26,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 18:01:26,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 18:01:26,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 18:01:26,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 18:01:26,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 18:01:26,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 18:01:26,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 18:01:26,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 18:01:26,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 18:01:26,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 18:01:26,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 18:01:26,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 18:01:26,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 18:01:26,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 18:01:26,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 18:01:26,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 18:01:26,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 18:01:26,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 18:01:26,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 18:01:26,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 18:01:26,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 18:01:26,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 18:01:26,076 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 18:01:26,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 18:01:26,076 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 18:01:26,077 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 18:01:26,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 18:01:26,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 18:01:26,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 18:01:26,078 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 18:01:26,078 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 18:01:26,078 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 18:01:26,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 18:01:26,078 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 18:01:26,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 18:01:26,079 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 18:01:26,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 18:01:26,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 18:01:26,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 18:01:26,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:01:26,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 18:01:26,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 18:01:26,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 18:01:26,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 18:01:26,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 18:01:26,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aa86be9eb0317030839433587db2b1c5b5e93d6 [2021-08-30 18:01:26,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 18:01:26,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 18:01:26,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 18:01:26,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 18:01:26,387 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 18:01:26,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-08-30 18:01:26,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581749886/76388325a9494ce4a275f425fbdf47a5/FLAG92c141904 [2021-08-30 18:01:26,909 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 18:01:26,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-08-30 18:01:26,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581749886/76388325a9494ce4a275f425fbdf47a5/FLAG92c141904 [2021-08-30 18:01:27,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581749886/76388325a9494ce4a275f425fbdf47a5 [2021-08-30 18:01:27,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 18:01:27,300 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 18:01:27,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 18:01:27,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 18:01:27,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 18:01:27,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ba434a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27, skipping insertion in model container [2021-08-30 18:01:27,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 18:01:27,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 18:01:27,571 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-08-30 18:01:27,573 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-08-30 18:01:27,574 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-08-30 18:01:27,575 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-08-30 18:01:27,575 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-08-30 18:01:27,576 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-08-30 18:01:27,577 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-08-30 18:01:27,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:01:27,584 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 18:01:27,603 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-08-30 18:01:27,603 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-08-30 18:01:27,604 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-08-30 18:01:27,604 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-08-30 18:01:27,605 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-08-30 18:01:27,605 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-08-30 18:01:27,606 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-08-30 18:01:27,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:01:27,623 INFO L208 MainTranslator]: Completed translation [2021-08-30 18:01:27,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27 WrapperNode [2021-08-30 18:01:27,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 18:01:27,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 18:01:27,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 18:01:27,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 18:01:27,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 18:01:27,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 18:01:27,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 18:01:27,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 18:01:27,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27" (1/1) ... [2021-08-30 18:01:27,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:01:27,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:01:27,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-30 18:01:27,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-30 18:01:27,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 18:01:27,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 18:01:27,701 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 18:01:27,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 18:01:27,701 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 18:01:27,701 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 18:01:27,702 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 18:01:27,702 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 18:01:27,702 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 18:01:27,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 18:01:27,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 18:01:27,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 18:01:27,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 18:01:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 18:01:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 18:01:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 18:01:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 18:01:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 18:01:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 18:01:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 18:01:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 18:01:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 18:01:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 18:01:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 18:01:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 18:01:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 18:01:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 18:01:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 18:01:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 18:01:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 18:01:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 18:01:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 18:01:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 18:01:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 18:01:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 18:01:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 18:01:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 18:01:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 18:01:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 18:01:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 18:01:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 18:01:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 18:01:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 18:01:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 18:01:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 18:01:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 18:01:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 18:01:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 18:01:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 18:01:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 18:01:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 18:01:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 18:01:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 18:01:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 18:01:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 18:01:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 18:01:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 18:01:27,708 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 18:01:27,709 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-30 18:01:27,709 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 18:01:27,709 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 18:01:27,709 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 18:01:27,709 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 18:01:27,709 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 18:01:27,709 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 18:01:27,709 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 18:01:27,710 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 18:01:27,710 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 18:01:27,710 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 18:01:27,710 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 18:01:27,710 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 18:01:27,710 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 18:01:27,710 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 18:01:27,710 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 18:01:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 18:01:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 18:01:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 18:01:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 18:01:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 18:01:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 18:01:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 18:01:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 18:01:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 18:01:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 18:01:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 18:01:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 18:01:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 18:01:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 18:01:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 18:01:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 18:01:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 18:01:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 18:01:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 18:01:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 18:01:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 18:01:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 18:01:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 18:01:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 18:01:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 18:01:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 18:01:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 18:01:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 18:01:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 18:01:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 18:01:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 18:01:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 18:01:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 18:01:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 18:01:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 18:01:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 18:01:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 18:01:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 18:01:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 18:01:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 18:01:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 18:01:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 18:01:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 18:01:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 18:01:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 18:01:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 18:01:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 18:01:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 18:01:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 18:01:28,162 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 18:01:28,163 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-30 18:01:28,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:28 BoogieIcfgContainer [2021-08-30 18:01:28,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 18:01:28,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 18:01:28,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 18:01:28,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 18:01:28,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:01:27" (1/3) ... [2021-08-30 18:01:28,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542f4904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:01:28, skipping insertion in model container [2021-08-30 18:01:28,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:27" (2/3) ... [2021-08-30 18:01:28,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542f4904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:01:28, skipping insertion in model container [2021-08-30 18:01:28,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:28" (3/3) ... [2021-08-30 18:01:28,175 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-08-30 18:01:28,194 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 18:01:28,194 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2021-08-30 18:01:28,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 18:01:28,261 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-30 18:01:28,261 INFO L340 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2021-08-30 18:01:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 89 states have (on average 2.202247191011236) internal successors, (196), 166 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 18:01:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-30 18:01:28,298 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:28,298 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:28,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:28,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:28,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1463572285, now seen corresponding path program 1 times [2021-08-30 18:01:28,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:28,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841913475] [2021-08-30 18:01:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:28,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:28,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:28,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:28,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841913475] [2021-08-30 18:01:28,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841913475] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:28,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:28,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 18:01:28,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312060448] [2021-08-30 18:01:28,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:01:28,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:01:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:28,563 INFO L87 Difference]: Start difference. First operand has 171 states, 89 states have (on average 2.202247191011236) internal successors, (196), 166 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-08-30 18:01:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:28,854 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2021-08-30 18:01:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:01:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-08-30 18:01:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:28,862 INFO L225 Difference]: With dead ends: 197 [2021-08-30 18:01:28,862 INFO L226 Difference]: Without dead ends: 193 [2021-08-30 18:01:28,863 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.40ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:28,865 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 150 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 257.21ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:28,866 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 8 Invalid, 389 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [6 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 257.21ms Time] [2021-08-30 18:01:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-30 18:01:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 165. [2021-08-30 18:01:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 88 states have (on average 1.8977272727272727) internal successors, (167), 161 states have internal predecessors, (167), 2 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) [2021-08-30 18:01:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 170 transitions. [2021-08-30 18:01:28,896 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 170 transitions. Word has length 7 [2021-08-30 18:01:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:28,896 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 170 transitions. [2021-08-30 18:01:28,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-08-30 18:01:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 170 transitions. [2021-08-30 18:01:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-30 18:01:28,897 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:28,897 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:28,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 18:01:28,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:28,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1463572286, now seen corresponding path program 1 times [2021-08-30 18:01:28,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:28,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518012507] [2021-08-30 18:01:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:28,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:28,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:28,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:28,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518012507] [2021-08-30 18:01:28,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518012507] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:28,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:28,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 18:01:28,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904791587] [2021-08-30 18:01:28,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:01:28,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:28,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:01:28,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:28,953 INFO L87 Difference]: Start difference. First operand 165 states and 170 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-08-30 18:01:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:29,158 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2021-08-30 18:01:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:01:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-08-30 18:01:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:29,160 INFO L225 Difference]: With dead ends: 162 [2021-08-30 18:01:29,160 INFO L226 Difference]: Without dead ends: 162 [2021-08-30 18:01:29,160 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.50ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:29,161 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 158 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.32ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:29,161 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 7 Invalid, 336 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [6 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 191.32ms Time] [2021-08-30 18:01:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-08-30 18:01:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-08-30 18:01:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 88 states have (on average 1.8636363636363635) internal successors, (164), 158 states have internal predecessors, (164), 2 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) [2021-08-30 18:01:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2021-08-30 18:01:29,170 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 7 [2021-08-30 18:01:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:29,170 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2021-08-30 18:01:29,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-08-30 18:01:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2021-08-30 18:01:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 18:01:29,171 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:29,171 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:29,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 18:01:29,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:29,172 INFO L82 PathProgramCache]: Analyzing trace with hash 646742145, now seen corresponding path program 1 times [2021-08-30 18:01:29,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:29,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648321575] [2021-08-30 18:01:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:29,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:29,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:29,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:29,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648321575] [2021-08-30 18:01:29,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648321575] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:29,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:29,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 18:01:29,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947768873] [2021-08-30 18:01:29,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:01:29,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:01:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:29,227 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-08-30 18:01:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:29,450 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2021-08-30 18:01:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:01:29,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-08-30 18:01:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:29,454 INFO L225 Difference]: With dead ends: 161 [2021-08-30 18:01:29,454 INFO L226 Difference]: Without dead ends: 161 [2021-08-30 18:01:29,456 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.83ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:29,458 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 135 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 203.20ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:29,459 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 7 Invalid, 349 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [11 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 203.20ms Time] [2021-08-30 18:01:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-30 18:01:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2021-08-30 18:01:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 90 states have (on average 1.788888888888889) internal successors, (161), 153 states have internal predecessors, (161), 2 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) [2021-08-30 18:01:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 164 transitions. [2021-08-30 18:01:29,477 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 164 transitions. Word has length 11 [2021-08-30 18:01:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:29,479 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 164 transitions. [2021-08-30 18:01:29,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-08-30 18:01:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 164 transitions. [2021-08-30 18:01:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 18:01:29,480 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:29,481 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:29,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 18:01:29,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash 646742146, now seen corresponding path program 1 times [2021-08-30 18:01:29,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:29,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039176607] [2021-08-30 18:01:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:29,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:29,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:29,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:29,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039176607] [2021-08-30 18:01:29,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039176607] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:29,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:29,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 18:01:29,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008077034] [2021-08-30 18:01:29,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:01:29,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:01:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:29,577 INFO L87 Difference]: Start difference. First operand 157 states and 164 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-08-30 18:01:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:29,817 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2021-08-30 18:01:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:01:29,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-08-30 18:01:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:29,819 INFO L225 Difference]: With dead ends: 174 [2021-08-30 18:01:29,819 INFO L226 Difference]: Without dead ends: 174 [2021-08-30 18:01:29,819 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.52ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:29,820 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 131 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 184.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 230.81ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:29,820 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 7 Invalid, 359 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [10 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 230.81ms Time] [2021-08-30 18:01:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-30 18:01:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 161. [2021-08-30 18:01:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 97 states have (on average 1.7010309278350515) internal successors, (165), 157 states have internal predecessors, (165), 2 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) [2021-08-30 18:01:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 168 transitions. [2021-08-30 18:01:29,824 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 168 transitions. Word has length 11 [2021-08-30 18:01:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:29,825 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 168 transitions. [2021-08-30 18:01:29,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-08-30 18:01:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 168 transitions. [2021-08-30 18:01:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 18:01:29,826 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:29,826 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:29,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 18:01:29,826 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash -955929302, now seen corresponding path program 1 times [2021-08-30 18:01:29,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:29,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565650278] [2021-08-30 18:01:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:29,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:29,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:29,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:29,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565650278] [2021-08-30 18:01:29,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565650278] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:29,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:29,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 18:01:29,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438957701] [2021-08-30 18:01:29,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 18:01:29,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 18:01:29,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:01:29,885 INFO L87 Difference]: Start difference. First operand 161 states and 168 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-08-30 18:01:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:30,095 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2021-08-30 18:01:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 18:01:30,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-08-30 18:01:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:30,096 INFO L225 Difference]: With dead ends: 162 [2021-08-30 18:01:30,096 INFO L226 Difference]: Without dead ends: 162 [2021-08-30 18:01:30,096 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.78ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:30,097 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 214 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 194.50ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:30,097 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 10 Invalid, 384 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [27 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 194.50ms Time] [2021-08-30 18:01:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-08-30 18:01:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 148. [2021-08-30 18:01:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 99 states have (on average 1.5555555555555556) internal successors, (154), 144 states have internal predecessors, (154), 2 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) [2021-08-30 18:01:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 157 transitions. [2021-08-30 18:01:30,101 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 157 transitions. Word has length 17 [2021-08-30 18:01:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:30,101 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 157 transitions. [2021-08-30 18:01:30,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-08-30 18:01:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 157 transitions. [2021-08-30 18:01:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 18:01:30,102 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:30,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:30,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 18:01:30,102 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash -955929301, now seen corresponding path program 1 times [2021-08-30 18:01:30,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:30,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399420568] [2021-08-30 18:01:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:30,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:30,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:30,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:30,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399420568] [2021-08-30 18:01:30,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399420568] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:30,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:30,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 18:01:30,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083350594] [2021-08-30 18:01:30,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 18:01:30,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 18:01:30,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:01:30,199 INFO L87 Difference]: Start difference. First operand 148 states and 157 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-08-30 18:01:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:30,535 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2021-08-30 18:01:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:01:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-08-30 18:01:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:30,537 INFO L225 Difference]: With dead ends: 187 [2021-08-30 18:01:30,537 INFO L226 Difference]: Without dead ends: 187 [2021-08-30 18:01:30,537 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.26ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:30,538 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 178 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 251.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 300.59ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:30,538 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 10 Invalid, 456 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [13 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 300.59ms Time] [2021-08-30 18:01:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-30 18:01:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 158. [2021-08-30 18:01:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 110 states have (on average 1.518181818181818) internal successors, (167), 154 states have internal predecessors, (167), 2 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) [2021-08-30 18:01:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2021-08-30 18:01:30,542 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 17 [2021-08-30 18:01:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:30,542 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2021-08-30 18:01:30,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-08-30 18:01:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2021-08-30 18:01:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 18:01:30,543 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:30,543 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:30,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 18:01:30,544 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr45ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:30,544 INFO L82 PathProgramCache]: Analyzing trace with hash 474995261, now seen corresponding path program 1 times [2021-08-30 18:01:30,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:30,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731047150] [2021-08-30 18:01:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:30,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:30,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:30,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:30,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731047150] [2021-08-30 18:01:30,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731047150] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:30,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:30,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 18:01:30,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750786201] [2021-08-30 18:01:30,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:01:30,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:01:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:30,598 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-08-30 18:01:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:30,906 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2021-08-30 18:01:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 18:01:30,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 19 [2021-08-30 18:01:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:30,909 INFO L225 Difference]: With dead ends: 201 [2021-08-30 18:01:30,909 INFO L226 Difference]: Without dead ends: 201 [2021-08-30 18:01:30,909 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.13ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:01:30,909 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 301 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 216.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 267.37ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:30,910 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 13 Invalid, 495 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [24 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 267.37ms Time] [2021-08-30 18:01:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-30 18:01:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-08-30 18:01:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 109 states have (on average 1.4954128440366972) internal successors, (163), 152 states have internal predecessors, (163), 2 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) [2021-08-30 18:01:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2021-08-30 18:01:30,913 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 19 [2021-08-30 18:01:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:30,913 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2021-08-30 18:01:30,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-08-30 18:01:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2021-08-30 18:01:30,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 18:01:30,914 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:30,914 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:30,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 18:01:30,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:30,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1838316838, now seen corresponding path program 1 times [2021-08-30 18:01:30,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:30,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444109608] [2021-08-30 18:01:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:30,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:30,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:30,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:30,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444109608] [2021-08-30 18:01:30,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444109608] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:30,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:30,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 18:01:30,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530674094] [2021-08-30 18:01:30,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:01:30,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:30,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:01:30,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:30,957 INFO L87 Difference]: Start difference. First operand 156 states and 166 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-08-30 18:01:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:31,216 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2021-08-30 18:01:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 18:01:31,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 20 [2021-08-30 18:01:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:31,218 INFO L225 Difference]: With dead ends: 155 [2021-08-30 18:01:31,218 INFO L226 Difference]: Without dead ends: 155 [2021-08-30 18:01:31,218 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.59ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:01:31,218 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 240.21ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:31,218 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 13 Invalid, 663 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [3 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 240.21ms Time] [2021-08-30 18:01:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-30 18:01:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-08-30 18:01:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 151 states have internal predecessors, (161), 2 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) [2021-08-30 18:01:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 164 transitions. [2021-08-30 18:01:31,222 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 164 transitions. Word has length 20 [2021-08-30 18:01:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:31,222 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 164 transitions. [2021-08-30 18:01:31,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-08-30 18:01:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 164 transitions. [2021-08-30 18:01:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 18:01:31,223 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:31,223 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:31,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 18:01:31,223 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:31,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1838316839, now seen corresponding path program 1 times [2021-08-30 18:01:31,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:31,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154912676] [2021-08-30 18:01:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:31,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:31,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:31,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:31,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154912676] [2021-08-30 18:01:31,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154912676] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:31,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:31,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 18:01:31,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713750455] [2021-08-30 18:01:31,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:01:31,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:01:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:31,288 INFO L87 Difference]: Start difference. First operand 155 states and 164 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-08-30 18:01:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:31,561 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2021-08-30 18:01:31,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:01:31,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 20 [2021-08-30 18:01:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:31,562 INFO L225 Difference]: With dead ends: 154 [2021-08-30 18:01:31,563 INFO L226 Difference]: Without dead ends: 154 [2021-08-30 18:01:31,563 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.88ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:01:31,563 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 203.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 249.15ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:31,563 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 663 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [2 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 249.15ms Time] [2021-08-30 18:01:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-30 18:01:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-08-30 18:01:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 109 states have (on average 1.4587155963302751) internal successors, (159), 150 states have internal predecessors, (159), 2 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) [2021-08-30 18:01:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2021-08-30 18:01:31,566 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 20 [2021-08-30 18:01:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:31,566 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2021-08-30 18:01:31,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-08-30 18:01:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2021-08-30 18:01:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 18:01:31,567 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:31,567 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:31,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 18:01:31,567 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:31,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1329344305, now seen corresponding path program 1 times [2021-08-30 18:01:31,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:31,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112795630] [2021-08-30 18:01:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:31,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:31,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:31,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:31,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112795630] [2021-08-30 18:01:31,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112795630] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:31,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:31,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 18:01:31,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715634127] [2021-08-30 18:01:31,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 18:01:31,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:31,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 18:01:31,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:01:31,662 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-08-30 18:01:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:32,043 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2021-08-30 18:01:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 18:01:32,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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 22 [2021-08-30 18:01:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:32,044 INFO L225 Difference]: With dead ends: 208 [2021-08-30 18:01:32,044 INFO L226 Difference]: Without dead ends: 208 [2021-08-30 18:01:32,045 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 63.15ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-30 18:01:32,045 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 227 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 273.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 333.33ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:32,045 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 19 Invalid, 829 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [20 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 333.33ms Time] [2021-08-30 18:01:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-30 18:01:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2021-08-30 18:01:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 114 states have (on average 1.4385964912280702) internal successors, (164), 155 states have internal predecessors, (164), 2 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) [2021-08-30 18:01:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2021-08-30 18:01:32,048 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 167 transitions. Word has length 22 [2021-08-30 18:01:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:32,048 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 167 transitions. [2021-08-30 18:01:32,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-08-30 18:01:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 167 transitions. [2021-08-30 18:01:32,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-30 18:01:32,049 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:32,049 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:32,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 18:01:32,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash 942465896, now seen corresponding path program 1 times [2021-08-30 18:01:32,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:32,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456017169] [2021-08-30 18:01:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:32,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:32,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:32,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:32,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456017169] [2021-08-30 18:01:32,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456017169] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:32,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:32,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 18:01:32,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643482126] [2021-08-30 18:01:32,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 18:01:32,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:32,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 18:01:32,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:01:32,134 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-08-30 18:01:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:32,486 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2021-08-30 18:01:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 18:01:32,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 24 [2021-08-30 18:01:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:32,488 INFO L225 Difference]: With dead ends: 158 [2021-08-30 18:01:32,489 INFO L226 Difference]: Without dead ends: 158 [2021-08-30 18:01:32,489 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 94.06ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-30 18:01:32,490 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 187 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 237.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 285.90ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:32,490 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 19 Invalid, 754 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [19 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 285.90ms Time] [2021-08-30 18:01:32,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-30 18:01:32,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-08-30 18:01:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 114 states have (on average 1.4298245614035088) internal successors, (163), 154 states have internal predecessors, (163), 2 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) [2021-08-30 18:01:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 166 transitions. [2021-08-30 18:01:32,494 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 166 transitions. Word has length 24 [2021-08-30 18:01:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:32,494 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 166 transitions. [2021-08-30 18:01:32,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-08-30 18:01:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 166 transitions. [2021-08-30 18:01:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-30 18:01:32,497 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:32,497 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:32,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 18:01:32,497 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:32,498 INFO L82 PathProgramCache]: Analyzing trace with hash 942465897, now seen corresponding path program 1 times [2021-08-30 18:01:32,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:32,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267628159] [2021-08-30 18:01:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:32,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:32,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:32,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:32,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267628159] [2021-08-30 18:01:32,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267628159] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:32,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:32,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-30 18:01:32,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99919152] [2021-08-30 18:01:32,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 18:01:32,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 18:01:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:01:32,683 INFO L87 Difference]: Start difference. First operand 158 states and 166 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-08-30 18:01:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:33,150 INFO L93 Difference]: Finished difference Result 176 states and 185 transitions. [2021-08-30 18:01:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 18:01:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 24 [2021-08-30 18:01:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:33,151 INFO L225 Difference]: With dead ends: 176 [2021-08-30 18:01:33,151 INFO L226 Difference]: Without dead ends: 176 [2021-08-30 18:01:33,151 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 221.41ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-30 18:01:33,152 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 233 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.97ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 299.07ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:33,152 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 25 Invalid, 1026 Unknown, 0 Unchecked, 3.97ms Time], IncrementalHoareTripleChecker [33 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 299.07ms Time] [2021-08-30 18:01:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-08-30 18:01:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 162. [2021-08-30 18:01:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 124 states have (on average 1.3790322580645162) internal successors, (171), 158 states have internal predecessors, (171), 2 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) [2021-08-30 18:01:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 174 transitions. [2021-08-30 18:01:33,154 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 174 transitions. Word has length 24 [2021-08-30 18:01:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:33,154 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 174 transitions. [2021-08-30 18:01:33,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-08-30 18:01:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 174 transitions. [2021-08-30 18:01:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 18:01:33,155 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:33,155 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-08-30 18:01:33,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-30 18:01:33,155 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:33,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:33,156 INFO L82 PathProgramCache]: Analyzing trace with hash 470516267, now seen corresponding path program 1 times [2021-08-30 18:01:33,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:33,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265850817] [2021-08-30 18:01:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:33,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:33,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:33,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:33,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265850817] [2021-08-30 18:01:33,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265850817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:01:33,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438375010] [2021-08-30 18:01:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:33,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:01:33,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:01:33,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 18:01:33,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 18:01:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:33,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-30 18:01:33,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:33,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:33,417 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 18:01:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-30 18:01:33,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:01:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:01:33,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-08-30 18:01:33,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:01:33,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:01:33,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:01:33,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-08-30 18:01:33,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 18:01:33,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-08-30 18:01:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:33,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:34,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438375010] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:01:34,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:01:34,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 22 [2021-08-30 18:01:34,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961575116] [2021-08-30 18:01:34,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-30 18:01:34,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-30 18:01:34,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-30 18:01:34,071 INFO L87 Difference]: Start difference. First operand 162 states and 174 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:34,975 INFO L93 Difference]: Finished difference Result 194 states and 209 transitions. [2021-08-30 18:01:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 18:01:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-08-30 18:01:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:34,976 INFO L225 Difference]: With dead ends: 194 [2021-08-30 18:01:34,976 INFO L226 Difference]: Without dead ends: 194 [2021-08-30 18:01:34,976 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 561.46ms TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2021-08-30 18:01:34,977 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 228 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 467.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 568.93ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:34,977 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 46 Invalid, 1897 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [48 Valid, 1455 Invalid, 0 Unknown, 394 Unchecked, 568.93ms Time] [2021-08-30 18:01:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-08-30 18:01:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 169. [2021-08-30 18:01:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.366412213740458) internal successors, (179), 165 states have internal predecessors, (179), 2 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) [2021-08-30 18:01:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 182 transitions. [2021-08-30 18:01:34,980 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 182 transitions. Word has length 29 [2021-08-30 18:01:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:34,980 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 182 transitions. [2021-08-30 18:01:34,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 182 transitions. [2021-08-30 18:01:34,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 18:01:34,981 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:34,981 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:01:35,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:35,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-30 18:01:35,189 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash 428498014, now seen corresponding path program 1 times [2021-08-30 18:01:35,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:35,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980894766] [2021-08-30 18:01:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:35,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:35,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:35,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:35,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980894766] [2021-08-30 18:01:35,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980894766] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:35,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:35,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 18:01:35,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195216905] [2021-08-30 18:01:35,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:01:35,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:01:35,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:35,252 INFO L87 Difference]: Start difference. First operand 169 states and 182 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-08-30 18:01:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:35,514 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2021-08-30 18:01:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 18:01:35,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 29 [2021-08-30 18:01:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:35,516 INFO L225 Difference]: With dead ends: 173 [2021-08-30 18:01:35,516 INFO L226 Difference]: Without dead ends: 173 [2021-08-30 18:01:35,516 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.40ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:01:35,516 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 203.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 250.81ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:35,516 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 13 Invalid, 651 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [5 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 250.81ms Time] [2021-08-30 18:01:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-08-30 18:01:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2021-08-30 18:01:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 130 states have (on average 1.353846153846154) internal successors, (176), 164 states have internal predecessors, (176), 2 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) [2021-08-30 18:01:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 179 transitions. [2021-08-30 18:01:35,519 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 179 transitions. Word has length 29 [2021-08-30 18:01:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:35,519 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 179 transitions. [2021-08-30 18:01:35,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-08-30 18:01:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 179 transitions. [2021-08-30 18:01:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 18:01:35,520 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:35,520 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:01:35,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-30 18:01:35,520 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr40ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:35,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1019922444, now seen corresponding path program 1 times [2021-08-30 18:01:35,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:35,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268690035] [2021-08-30 18:01:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:35,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:35,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:35,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:35,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268690035] [2021-08-30 18:01:35,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268690035] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:35,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:35,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 18:01:35,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115738575] [2021-08-30 18:01:35,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 18:01:35,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 18:01:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:01:35,561 INFO L87 Difference]: Start difference. First operand 168 states and 179 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-08-30 18:01:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:35,748 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2021-08-30 18:01:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:01:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 30 [2021-08-30 18:01:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:35,749 INFO L225 Difference]: With dead ends: 170 [2021-08-30 18:01:35,749 INFO L226 Difference]: Without dead ends: 170 [2021-08-30 18:01:35,749 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.12ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:35,749 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.71ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:35,749 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 511 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [4 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 176.71ms Time] [2021-08-30 18:01:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-30 18:01:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2021-08-30 18:01:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 129 states have (on average 1.3410852713178294) internal successors, (173), 162 states have internal predecessors, (173), 2 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) [2021-08-30 18:01:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2021-08-30 18:01:35,752 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 30 [2021-08-30 18:01:35,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:35,752 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2021-08-30 18:01:35,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-08-30 18:01:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2021-08-30 18:01:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-30 18:01:35,753 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:35,753 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:01:35,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-30 18:01:35,753 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1154646554, now seen corresponding path program 1 times [2021-08-30 18:01:35,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:35,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389386163] [2021-08-30 18:01:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:35,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:35,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:35,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:35,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389386163] [2021-08-30 18:01:35,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389386163] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:35,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:35,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 18:01:35,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382399965] [2021-08-30 18:01:35,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:01:35,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:01:35,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:35,837 INFO L87 Difference]: Start difference. First operand 166 states and 176 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-08-30 18:01:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:36,100 INFO L93 Difference]: Finished difference Result 165 states and 175 transitions. [2021-08-30 18:01:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:01:36,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 32 [2021-08-30 18:01:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:36,101 INFO L225 Difference]: With dead ends: 165 [2021-08-30 18:01:36,101 INFO L226 Difference]: Without dead ends: 165 [2021-08-30 18:01:36,101 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.20ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:01:36,102 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 206.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 243.67ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:36,102 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 613 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [2 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 243.67ms Time] [2021-08-30 18:01:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-30 18:01:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-08-30 18:01:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 129 states have (on average 1.3333333333333333) internal successors, (172), 161 states have internal predecessors, (172), 2 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) [2021-08-30 18:01:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2021-08-30 18:01:36,106 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 32 [2021-08-30 18:01:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:36,107 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2021-08-30 18:01:36,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-08-30 18:01:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2021-08-30 18:01:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-30 18:01:36,107 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:36,108 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:01:36,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-30 18:01:36,108 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1154646553, now seen corresponding path program 1 times [2021-08-30 18:01:36,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:36,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576873820] [2021-08-30 18:01:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:36,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:36,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:36,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:36,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576873820] [2021-08-30 18:01:36,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576873820] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:36,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:36,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 18:01:36,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51943314] [2021-08-30 18:01:36,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:01:36,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:36,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:01:36,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:36,161 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-08-30 18:01:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:36,421 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2021-08-30 18:01:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 18:01:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 32 [2021-08-30 18:01:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:36,422 INFO L225 Difference]: With dead ends: 164 [2021-08-30 18:01:36,422 INFO L226 Difference]: Without dead ends: 164 [2021-08-30 18:01:36,422 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.94ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:01:36,423 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 243.41ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:36,423 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 608 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [3 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 243.41ms Time] [2021-08-30 18:01:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-30 18:01:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-08-30 18:01:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 129 states have (on average 1.3255813953488371) internal successors, (171), 160 states have internal predecessors, (171), 2 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) [2021-08-30 18:01:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 174 transitions. [2021-08-30 18:01:36,425 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 174 transitions. Word has length 32 [2021-08-30 18:01:36,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:36,425 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 174 transitions. [2021-08-30 18:01:36,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-08-30 18:01:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 174 transitions. [2021-08-30 18:01:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-30 18:01:36,426 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:36,426 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:01:36,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-30 18:01:36,426 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:36,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1914894277, now seen corresponding path program 1 times [2021-08-30 18:01:36,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:36,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659296609] [2021-08-30 18:01:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:36,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:36,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:36,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:36,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659296609] [2021-08-30 18:01:36,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659296609] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:36,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:36,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 18:01:36,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368967601] [2021-08-30 18:01:36,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 18:01:36,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:36,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 18:01:36,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:01:36,487 INFO L87 Difference]: Start difference. First operand 164 states and 174 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-08-30 18:01:36,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:36,697 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2021-08-30 18:01:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:01:36,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 33 [2021-08-30 18:01:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:36,698 INFO L225 Difference]: With dead ends: 163 [2021-08-30 18:01:36,698 INFO L226 Difference]: Without dead ends: 163 [2021-08-30 18:01:36,698 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.95ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:36,698 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.91ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:36,699 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 482 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [5 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 196.91ms Time] [2021-08-30 18:01:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-30 18:01:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-08-30 18:01:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 128 states have (on average 1.3125) internal successors, (168), 158 states have internal predecessors, (168), 2 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) [2021-08-30 18:01:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2021-08-30 18:01:36,701 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 33 [2021-08-30 18:01:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:36,701 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2021-08-30 18:01:36,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-08-30 18:01:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2021-08-30 18:01:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 18:01:36,701 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:36,701 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-08-30 18:01:36,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-30 18:01:36,702 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr74ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1259434580, now seen corresponding path program 1 times [2021-08-30 18:01:36,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:36,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546301039] [2021-08-30 18:01:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:36,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:36,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:01:36,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:36,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546301039] [2021-08-30 18:01:36,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546301039] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:36,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:36,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 18:01:36,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688135795] [2021-08-30 18:01:36,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:01:36,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:01:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:36,752 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-08-30 18:01:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:36,906 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-08-30 18:01:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:01:36,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2021-08-30 18:01:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:36,907 INFO L225 Difference]: With dead ends: 164 [2021-08-30 18:01:36,907 INFO L226 Difference]: Without dead ends: 164 [2021-08-30 18:01:36,907 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.03ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:36,908 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.66ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.64ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:36,908 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 7 Invalid, 280 Unknown, 0 Unchecked, 0.66ms Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 148.64ms Time] [2021-08-30 18:01:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-30 18:01:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-08-30 18:01:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 130 states have (on average 1.3076923076923077) internal successors, (170), 160 states have internal predecessors, (170), 2 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) [2021-08-30 18:01:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 173 transitions. [2021-08-30 18:01:36,910 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 173 transitions. Word has length 35 [2021-08-30 18:01:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:36,910 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 173 transitions. [2021-08-30 18:01:36,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-08-30 18:01:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 173 transitions. [2021-08-30 18:01:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 18:01:36,911 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:36,912 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-08-30 18:01:36,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-30 18:01:36,912 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:36,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:36,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1967527785, now seen corresponding path program 1 times [2021-08-30 18:01:36,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:36,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61180761] [2021-08-30 18:01:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:36,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:37,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:37,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:37,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61180761] [2021-08-30 18:01:37,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61180761] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:37,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:37,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-30 18:01:37,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449263033] [2021-08-30 18:01:37,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 18:01:37,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:37,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 18:01:37,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-30 18:01:37,035 INFO L87 Difference]: Start difference. First operand 164 states and 173 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-08-30 18:01:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:37,585 INFO L93 Difference]: Finished difference Result 202 states and 211 transitions. [2021-08-30 18:01:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-30 18:01:37,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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 35 [2021-08-30 18:01:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:37,586 INFO L225 Difference]: With dead ends: 202 [2021-08-30 18:01:37,586 INFO L226 Difference]: Without dead ends: 202 [2021-08-30 18:01:37,587 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 228.66ms TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2021-08-30 18:01:37,588 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 358 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 300.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 356.83ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:37,588 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 28 Invalid, 998 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [53 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 356.83ms Time] [2021-08-30 18:01:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-30 18:01:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2021-08-30 18:01:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 130 states have (on average 1.3) internal successors, (169), 160 states have internal predecessors, (169), 2 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) [2021-08-30 18:01:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 172 transitions. [2021-08-30 18:01:37,595 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 172 transitions. Word has length 35 [2021-08-30 18:01:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:37,595 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 172 transitions. [2021-08-30 18:01:37,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-08-30 18:01:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 172 transitions. [2021-08-30 18:01:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-30 18:01:37,596 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:37,596 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-08-30 18:01:37,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-30 18:01:37,596 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1254504805, now seen corresponding path program 1 times [2021-08-30 18:01:37,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:37,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955113183] [2021-08-30 18:01:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:37,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:37,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:37,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:37,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955113183] [2021-08-30 18:01:37,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955113183] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:37,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:37,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 18:01:37,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844261945] [2021-08-30 18:01:37,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 18:01:37,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 18:01:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:01:37,688 INFO L87 Difference]: Start difference. First operand 164 states and 172 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-08-30 18:01:37,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:37,957 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-08-30 18:01:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 18:01:37,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 36 [2021-08-30 18:01:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:37,959 INFO L225 Difference]: With dead ends: 164 [2021-08-30 18:01:37,959 INFO L226 Difference]: Without dead ends: 164 [2021-08-30 18:01:37,959 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.05ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-30 18:01:37,961 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 230.28ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:37,961 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 16 Invalid, 691 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [12 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 230.28ms Time] [2021-08-30 18:01:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-30 18:01:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-08-30 18:01:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 130 states have (on average 1.2923076923076924) internal successors, (168), 159 states have internal predecessors, (168), 2 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) [2021-08-30 18:01:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 171 transitions. [2021-08-30 18:01:37,966 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 171 transitions. Word has length 36 [2021-08-30 18:01:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:37,966 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 171 transitions. [2021-08-30 18:01:37,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-08-30 18:01:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 171 transitions. [2021-08-30 18:01:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-30 18:01:37,968 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:37,968 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-08-30 18:01:37,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-30 18:01:37,968 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1254504804, now seen corresponding path program 1 times [2021-08-30 18:01:37,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:37,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508591258] [2021-08-30 18:01:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:37,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:38,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:38,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:38,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508591258] [2021-08-30 18:01:38,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508591258] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:38,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:38,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 18:01:38,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958783781] [2021-08-30 18:01:38,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 18:01:38,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 18:01:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:01:38,073 INFO L87 Difference]: Start difference. First operand 163 states and 171 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-08-30 18:01:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:38,615 INFO L93 Difference]: Finished difference Result 159 states and 167 transitions. [2021-08-30 18:01:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 18:01:38,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 36 [2021-08-30 18:01:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:38,616 INFO L225 Difference]: With dead ends: 159 [2021-08-30 18:01:38,616 INFO L226 Difference]: Without dead ends: 159 [2021-08-30 18:01:38,616 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 104.30ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-30 18:01:38,617 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 385.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.50ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 475.05ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:38,617 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 25 Invalid, 1139 Unknown, 0 Unchecked, 2.50ms Time], IncrementalHoareTripleChecker [20 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 475.05ms Time] [2021-08-30 18:01:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-30 18:01:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2021-08-30 18:01:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 143 states have internal predecessors, (151), 2 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) [2021-08-30 18:01:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 154 transitions. [2021-08-30 18:01:38,619 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 154 transitions. Word has length 36 [2021-08-30 18:01:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:38,619 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 154 transitions. [2021-08-30 18:01:38,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-08-30 18:01:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 154 transitions. [2021-08-30 18:01:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-30 18:01:38,619 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:38,619 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-30 18:01:38,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-30 18:01:38,620 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr66REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:38,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2131891079, now seen corresponding path program 1 times [2021-08-30 18:01:38,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:38,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886574389] [2021-08-30 18:01:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:38,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:38,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:38,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:38,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886574389] [2021-08-30 18:01:38,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886574389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:01:38,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816822793] [2021-08-30 18:01:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:38,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:01:38,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:01:38,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 18:01:38,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 18:01:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:38,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 18:01:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:38,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-30 18:01:38,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-08-30 18:01:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:01:38,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 18:01:38,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816822793] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:38,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 18:01:38,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2021-08-30 18:01:38,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947965646] [2021-08-30 18:01:38,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:01:38,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:01:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:01:38,858 INFO L87 Difference]: Start difference. First operand 147 states and 154 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:39,014 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2021-08-30 18:01:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:01:39,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (2), 1 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 37 [2021-08-30 18:01:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:39,015 INFO L225 Difference]: With dead ends: 156 [2021-08-30 18:01:39,015 INFO L226 Difference]: Without dead ends: 156 [2021-08-30 18:01:39,016 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.16ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:01:39,016 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.55ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.50ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:39,016 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 338 Unknown, 0 Unchecked, 0.55ms Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 146.50ms Time] [2021-08-30 18:01:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-30 18:01:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2021-08-30 18:01:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 124 states have (on average 1.2419354838709677) internal successors, (154), 146 states have internal predecessors, (154), 2 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) [2021-08-30 18:01:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 157 transitions. [2021-08-30 18:01:39,018 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 157 transitions. Word has length 37 [2021-08-30 18:01:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:39,018 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 157 transitions. [2021-08-30 18:01:39,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 157 transitions. [2021-08-30 18:01:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-30 18:01:39,019 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:39,019 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1] [2021-08-30 18:01:39,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:39,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-30 18:01:39,226 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr59REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:39,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1019054532, now seen corresponding path program 1 times [2021-08-30 18:01:39,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:39,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350727912] [2021-08-30 18:01:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:39,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:39,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:01:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:39,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:01:39,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350727912] [2021-08-30 18:01:39,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350727912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:01:39,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992976662] [2021-08-30 18:01:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:39,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:01:39,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:01:39,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 18:01:39,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 18:01:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:39,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-30 18:01:39,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:39,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:01:39,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:01:39,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-08-30 18:01:39,447 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-08-30 18:01:39,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2021-08-30 18:01:39,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-08-30 18:01:39,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:01:39,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:01:39,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-08-30 18:01:39,491 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-30 18:01:39,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-08-30 18:01:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:01:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:01:39,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:01:39,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-08-30 18:01:39,655 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-30 18:01:39,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-08-30 18:01:39,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-30 18:01:39,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-08-30 18:01:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:01:39,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:01:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992976662] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:01:39,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:01:39,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 9 [2021-08-30 18:01:39,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059899956] [2021-08-30 18:01:39,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 18:01:39,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:01:39,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 18:01:39,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:01:39,799 INFO L87 Difference]: Start difference. First operand 150 states and 157 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:40,107 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2021-08-30 18:01:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 18:01:40,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-08-30 18:01:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:40,108 INFO L225 Difference]: With dead ends: 160 [2021-08-30 18:01:40,109 INFO L226 Difference]: Without dead ends: 160 [2021-08-30 18:01:40,109 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 82.79ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-30 18:01:40,110 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 262.13ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:40,110 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 22 Invalid, 897 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [9 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 262.13ms Time] [2021-08-30 18:01:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-30 18:01:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2021-08-30 18:01:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 152 states have internal predecessors, (160), 2 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) [2021-08-30 18:01:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2021-08-30 18:01:40,122 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 38 [2021-08-30 18:01:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:40,122 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2021-08-30 18:01:40,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2021-08-30 18:01:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-30 18:01:40,123 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:40,123 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:40,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-30 18:01:40,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:01:40,328 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr76ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1525919079, now seen corresponding path program 1 times [2021-08-30 18:01:40,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:01:40,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404163083] [2021-08-30 18:01:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:40,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:01:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 18:01:40,337 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 18:01:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 18:01:40,371 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 18:01:40,372 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 18:01:40,372 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr76ENSURES_VIOLATIONMEMORY_LEAK (76 of 77 remaining) [2021-08-30 18:01:40,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (75 of 77 remaining) [2021-08-30 18:01:40,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (74 of 77 remaining) [2021-08-30 18:01:40,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (73 of 77 remaining) [2021-08-30 18:01:40,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (72 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (71 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (70 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (69 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (68 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (67 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (66 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (65 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (64 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (63 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (62 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (61 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (60 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (59 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (58 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (57 of 77 remaining) [2021-08-30 18:01:40,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (56 of 77 remaining) [2021-08-30 18:01:40,375 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (55 of 77 remaining) [2021-08-30 18:01:40,375 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (54 of 77 remaining) [2021-08-30 18:01:40,375 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (53 of 77 remaining) [2021-08-30 18:01:40,375 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (52 of 77 remaining) [2021-08-30 18:01:40,375 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION (51 of 77 remaining) [2021-08-30 18:01:40,400 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION (50 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION (49 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION (48 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION (47 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION (46 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION (45 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION (44 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION (43 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION (42 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION (41 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION (40 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION (39 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION (38 of 77 remaining) [2021-08-30 18:01:40,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION (37 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION (36 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40ASSERT_VIOLATIONMEMORY_LEAK (35 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION (34 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION (33 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_LEAK (32 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ASSERT_VIOLATIONMEMORY_LEAK (31 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45ASSERT_VIOLATIONMEMORY_LEAK (30 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION (29 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION (28 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48ASSERT_VIOLATIONMEMORY_LEAK (27 of 77 remaining) [2021-08-30 18:01:40,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION (26 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50REQUIRES_VIOLATION (25 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION (24 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION (23 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53ASSERT_VIOLATIONMEMORY_LEAK (22 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION (21 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55REQUIRES_VIOLATION (20 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_LEAK (19 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57REQUIRES_VIOLATION (18 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58REQUIRES_VIOLATION (17 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59REQUIRES_VIOLATION (16 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60REQUIRES_VIOLATION (15 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr61REQUIRES_VIOLATION (14 of 77 remaining) [2021-08-30 18:01:40,403 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr62REQUIRES_VIOLATION (13 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr63ASSERT_VIOLATIONMEMORY_FREE (12 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr64ASSERT_VIOLATIONMEMORY_FREE (11 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr65ASSERT_VIOLATIONMEMORY_FREE (10 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr66REQUIRES_VIOLATION (9 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr67REQUIRES_VIOLATION (8 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr68ASSERT_VIOLATIONMEMORY_FREE (7 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr69ASSERT_VIOLATIONMEMORY_FREE (6 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr70ASSERT_VIOLATIONMEMORY_FREE (5 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr71REQUIRES_VIOLATION (4 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr72REQUIRES_VIOLATION (3 of 77 remaining) [2021-08-30 18:01:40,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr73ASSERT_VIOLATIONMEMORY_FREE (2 of 77 remaining) [2021-08-30 18:01:40,405 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr74ASSERT_VIOLATIONMEMORY_FREE (1 of 77 remaining) [2021-08-30 18:01:40,405 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr75ASSERT_VIOLATIONMEMORY_FREE (0 of 77 remaining) [2021-08-30 18:01:40,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-30 18:01:40,409 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 18:01:40,418 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 18:01:40,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 06:01:40 BoogieIcfgContainer [2021-08-30 18:01:40,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 18:01:40,429 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 18:01:40,430 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 18:01:40,430 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 18:01:40,430 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:28" (3/4) ... [2021-08-30 18:01:40,432 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-30 18:01:40,432 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 18:01:40,432 INFO L158 Benchmark]: Toolchain (without parser) took 13132.74ms. Allocated memory was 62.9MB in the beginning and 195.0MB in the end (delta: 132.1MB). Free memory was 44.3MB in the beginning and 167.0MB in the end (delta: -122.6MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2021-08-30 18:01:40,432 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 45.1MB in the beginning and 45.0MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 18:01:40,433 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.79ms. Allocated memory was 62.9MB in the beginning and 88.1MB in the end (delta: 25.2MB). Free memory was 44.0MB in the beginning and 64.0MB in the end (delta: -20.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-30 18:01:40,433 INFO L158 Benchmark]: Boogie Preprocessor took 33.68ms. Allocated memory is still 88.1MB. Free memory was 64.0MB in the beginning and 60.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 18:01:40,433 INFO L158 Benchmark]: RCFGBuilder took 505.21ms. Allocated memory is still 88.1MB. Free memory was 60.7MB in the beginning and 38.1MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-08-30 18:01:40,433 INFO L158 Benchmark]: TraceAbstraction took 12258.26ms. Allocated memory was 88.1MB in the beginning and 195.0MB in the end (delta: 107.0MB). Free memory was 37.6MB in the beginning and 168.0MB in the end (delta: -130.4MB). Peak memory consumption was 68.8MB. Max. memory is 16.1GB. [2021-08-30 18:01:40,433 INFO L158 Benchmark]: Witness Printer took 2.53ms. Allocated memory is still 195.0MB. Free memory was 168.0MB in the beginning and 167.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 18:01:40,434 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 45.1MB in the beginning and 45.0MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.79ms. Allocated memory was 62.9MB in the beginning and 88.1MB in the end (delta: 25.2MB). Free memory was 44.0MB in the beginning and 64.0MB in the end (delta: -20.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.68ms. Allocated memory is still 88.1MB. Free memory was 64.0MB in the beginning and 60.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 505.21ms. Allocated memory is still 88.1MB. Free memory was 60.7MB in the beginning and 38.1MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 12258.26ms. Allocated memory was 88.1MB in the beginning and 195.0MB in the end (delta: 107.0MB). Free memory was 37.6MB in the beginning and 168.0MB in the end (delta: -130.4MB). Peak memory consumption was 68.8MB. Max. memory is 16.1GB. * Witness Printer took 2.53ms. Allocated memory is still 195.0MB. Free memory was 168.0MB in the beginning and 167.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 996]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 996. Possible FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) VAL [null={-1:0}] [L1000] null->prev = ((void*)0) VAL [null={-1:0}] [L1001] null->colour = BLACK VAL [null={-1:0}] [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null VAL [list={-2:0}, null={-1:0}] [L1005] list->prev = null VAL [list={-2:0}, null={-1:0}] [L1006] list->colour = BLACK VAL [list={-2:0}, null={-1:0}] [L1008] struct TSLL* end = list; VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1042] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE null != end VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1045] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1045] COND FALSE !(RED == end->colour) [L1052] EXPR end->next VAL [end={-2:0}, end->next={-1:0}, list={-2:0}, null={-1:0}] [L1052] end = end->next [L1043] COND FALSE !(null != end) VAL [end={-1:0}, list={-2:0}, null={-1:0}] [L1056] COND TRUE null != list VAL [end={-1:0}, list={-2:0}, null={-1:0}] [L1058] EXPR list->colour VAL [end={-1:0}, list={-2:0}, list->colour=1, null={-1:0}] [L1058] COND FALSE !(RED == list->colour) [L1067] EXPR list->next VAL [end={-1:0}, list={-2:0}, list->next={-1:0}, null={-1:0}] [L1067] end = list->next [L1068] free(list) VAL [end={-1:0}, list={-2:0}, null={-1:0}] [L1068] free(list) VAL [end={-1:0}, list={-2:0}, null={-1:0}] [L1068] free(list) [L1069] list = end VAL [end={-1:0}, list={-1:0}, null={-1:0}] [L1056] COND FALSE !(null != list) VAL [end={-1:0}, list={-1:0}, null={-1:0}] [L1073] return 0; VAL [\result=0, end={-1:0}, list={-1:0}, null={-1:0}] - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1004]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1004]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1005]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1005]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1060]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1060]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1067]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1067]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 174 locations, 77 error locations. Started 1 CEGAR loops. OverallTime: 12169.26ms, OverallIterations: 25, TraceHistogramMax: 2, EmptinessCheckTime: 20.08ms, AutomataDifference: 7730.91ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 28.89ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2819 SdHoareTripleChecker+Valid, 6352.52ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2819 mSDsluCounter, 363 SdHoareTripleChecker+Invalid, 5161.50ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 394 IncrementalHoareTripleChecker+Unchecked, 4546 mSDsCounter, 340 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15074 IncrementalHoareTripleChecker+Invalid, 15808 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 340 mSolverCounterUnsat, 73 mSDtfsCounter, 15074 mSolverCounterSat, 54.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 432 GetRequests, 212 SyntacticMatches, 10 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1820.55ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=0, InterpolantAutomatonStates: 197, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 111.15ms AutomataMinimizationTime, 24 MinimizatonAttempts, 292 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 61.95ms SsaConstructionTime, 293.92ms SatisfiabilityAnalysisTime, 2771.54ms InterpolantComputationTime, 744 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 743 ConstructedInterpolants, 7 QuantifiedInterpolants, 6106 SizeOfPredicates, 23 NumberOfNonLiveVariables, 572 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 29 InterpolantComputations, 22 PerfectInterpolantSequences, 8/18 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-30 18:01:40,458 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... ### Bit-precise run ### This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 18:01:42,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 18:01:42,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 18:01:42,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 18:01:42,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 18:01:42,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 18:01:42,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 18:01:42,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 18:01:42,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 18:01:42,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 18:01:42,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 18:01:42,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 18:01:42,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 18:01:42,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 18:01:42,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 18:01:42,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 18:01:42,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 18:01:42,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 18:01:42,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 18:01:42,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 18:01:42,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 18:01:42,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 18:01:42,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 18:01:42,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 18:01:42,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 18:01:42,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 18:01:42,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 18:01:42,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 18:01:42,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 18:01:42,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 18:01:42,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 18:01:42,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 18:01:42,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 18:01:42,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 18:01:42,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 18:01:42,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 18:01:42,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 18:01:42,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 18:01:42,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 18:01:42,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 18:01:42,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 18:01:42,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-30 18:01:42,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 18:01:42,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 18:01:42,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 18:01:42,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 18:01:42,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 18:01:42,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 18:01:42,188 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 18:01:42,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 18:01:42,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 18:01:42,189 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 18:01:42,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 18:01:42,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 18:01:42,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 18:01:42,190 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 18:01:42,190 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 18:01:42,190 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 18:01:42,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 18:01:42,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 18:01:42,191 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-30 18:01:42,191 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-30 18:01:42,191 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 18:01:42,191 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 18:01:42,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 18:01:42,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 18:01:42,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 18:01:42,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:01:42,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 18:01:42,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 18:01:42,192 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-30 18:01:42,192 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-30 18:01:42,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 18:01:42,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-30 18:01:42,193 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aa86be9eb0317030839433587db2b1c5b5e93d6 [2021-08-30 18:01:42,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 18:01:42,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 18:01:42,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 18:01:42,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 18:01:42,460 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 18:01:42,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-08-30 18:01:42,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5d1004fc/e2081ceaca664c4facc2b257e020895b/FLAGbb6f05cf0 [2021-08-30 18:01:42,936 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 18:01:42,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-08-30 18:01:42,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5d1004fc/e2081ceaca664c4facc2b257e020895b/FLAGbb6f05cf0 [2021-08-30 18:01:42,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5d1004fc/e2081ceaca664c4facc2b257e020895b [2021-08-30 18:01:42,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 18:01:42,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 18:01:42,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 18:01:42,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 18:01:42,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 18:01:42,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:42" (1/1) ... [2021-08-30 18:01:42,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11d4f14c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:42, skipping insertion in model container [2021-08-30 18:01:42,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:42" (1/1) ... [2021-08-30 18:01:42,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 18:01:43,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 18:01:43,289 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-08-30 18:01:43,291 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-08-30 18:01:43,292 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-08-30 18:01:43,293 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-08-30 18:01:43,293 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-08-30 18:01:43,294 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-08-30 18:01:43,295 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-08-30 18:01:43,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:01:43,306 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 18:01:43,331 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-08-30 18:01:43,332 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-08-30 18:01:43,332 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-08-30 18:01:43,333 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-08-30 18:01:43,333 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-08-30 18:01:43,334 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-08-30 18:01:43,335 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-08-30 18:01:43,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:01:43,354 INFO L208 MainTranslator]: Completed translation [2021-08-30 18:01:43,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43 WrapperNode [2021-08-30 18:01:43,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 18:01:43,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 18:01:43,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 18:01:43,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 18:01:43,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43" (1/1) ... [2021-08-30 18:01:43,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43" (1/1) ... [2021-08-30 18:01:43,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43" (1/1) ... [2021-08-30 18:01:43,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43" (1/1) ... [2021-08-30 18:01:43,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43" (1/1) ... [2021-08-30 18:01:43,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43" (1/1) ... [2021-08-30 18:01:43,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43" (1/1) ... [2021-08-30 18:01:43,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 18:01:43,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 18:01:43,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 18:01:43,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 18:01:43,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43" (1/1) ... [2021-08-30 18:01:43,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:01:43,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:01:43,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-30 18:01:43,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-30 18:01:43,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 18:01:43,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 18:01:43,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-30 18:01:43,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 18:01:43,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 18:01:43,441 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 18:01:43,441 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 18:01:43,441 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 18:01:43,442 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 18:01:43,442 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 18:01:43,442 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 18:01:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 18:01:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 18:01:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 18:01:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 18:01:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 18:01:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 18:01:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 18:01:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 18:01:43,444 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 18:01:43,444 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 18:01:43,444 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 18:01:43,444 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 18:01:43,444 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 18:01:43,444 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 18:01:43,445 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 18:01:43,445 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 18:01:43,446 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 18:01:43,446 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 18:01:43,446 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 18:01:43,446 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 18:01:43,446 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 18:01:43,446 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 18:01:43,447 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 18:01:43,447 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 18:01:43,447 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 18:01:43,447 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 18:01:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 18:01:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 18:01:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 18:01:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 18:01:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 18:01:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 18:01:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 18:01:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 18:01:43,449 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 18:01:43,449 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 18:01:43,449 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 18:01:43,449 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 18:01:43,449 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 18:01:43,449 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 18:01:43,450 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 18:01:43,450 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 18:01:43,450 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 18:01:43,450 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 18:01:43,450 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 18:01:43,450 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 18:01:43,450 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 18:01:43,450 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 18:01:43,450 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 18:01:43,451 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 18:01:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 18:01:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 18:01:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 18:01:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 18:01:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 18:01:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 18:01:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 18:01:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 18:01:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 18:01:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 18:01:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 18:01:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 18:01:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 18:01:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 18:01:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 18:01:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 18:01:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 18:01:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 18:01:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 18:01:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 18:01:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 18:01:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 18:01:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 18:01:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 18:01:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 18:01:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 18:01:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 18:01:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 18:01:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 18:01:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 18:01:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 18:01:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 18:01:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 18:01:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 18:01:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 18:01:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 18:01:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 18:01:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 18:01:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 18:01:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 18:01:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 18:01:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 18:01:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 18:01:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 18:01:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 18:01:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 18:01:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 18:01:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-30 18:01:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 18:01:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-30 18:01:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 18:01:43,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 18:01:43,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-30 18:01:43,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 18:01:43,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-30 18:01:43,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-30 18:01:43,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-30 18:01:43,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 18:01:43,906 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-30 18:01:43,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:43 BoogieIcfgContainer [2021-08-30 18:01:43,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 18:01:43,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 18:01:43,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 18:01:43,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 18:01:43,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:01:42" (1/3) ... [2021-08-30 18:01:43,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671e048b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:01:43, skipping insertion in model container [2021-08-30 18:01:43,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:43" (2/3) ... [2021-08-30 18:01:43,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671e048b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:01:43, skipping insertion in model container [2021-08-30 18:01:43,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:43" (3/3) ... [2021-08-30 18:01:43,915 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-08-30 18:01:43,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 18:01:43,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2021-08-30 18:01:43,982 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 18:01:43,987 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-30 18:01:43,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2021-08-30 18:01:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 169 states, 87 states have (on average 2.2298850574712645) internal successors, (194), 164 states have internal predecessors, (194), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 18:01:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-30 18:01:44,016 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:44,016 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:44,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:44,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1610416047, now seen corresponding path program 1 times [2021-08-30 18:01:44,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:44,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819058958] [2021-08-30 18:01:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:44,029 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:44,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:44,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:44,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-30 18:01:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:44,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-30 18:01:44,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:44,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:44,275 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:44,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819058958] [2021-08-30 18:01:44,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819058958] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:44,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:44,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-30 18:01:44,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717908284] [2021-08-30 18:01:44,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 18:01:44,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 18:01:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 18:01:44,304 INFO L87 Difference]: Start difference. First operand has 169 states, 87 states have (on average 2.2298850574712645) internal successors, (194), 164 states have internal predecessors, (194), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:44,668 INFO L93 Difference]: Finished difference Result 195 states and 202 transitions. [2021-08-30 18:01:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 18:01:44,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 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 7 [2021-08-30 18:01:44,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:44,677 INFO L225 Difference]: With dead ends: 195 [2021-08-30 18:01:44,677 INFO L226 Difference]: Without dead ends: 191 [2021-08-30 18:01:44,679 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.72ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 18:01:44,681 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 148 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 335.78ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:44,683 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 7 Invalid, 216 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 335.78ms Time] [2021-08-30 18:01:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-30 18:01:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 163. [2021-08-30 18:01:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 86 states have (on average 1.9186046511627908) internal successors, (165), 159 states have internal predecessors, (165), 2 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) [2021-08-30 18:01:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 168 transitions. [2021-08-30 18:01:44,731 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 168 transitions. Word has length 7 [2021-08-30 18:01:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:44,731 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 168 transitions. [2021-08-30 18:01:44,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 168 transitions. [2021-08-30 18:01:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-30 18:01:44,732 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:44,732 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:44,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:44,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:44,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1610416046, now seen corresponding path program 1 times [2021-08-30 18:01:44,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:44,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806605549] [2021-08-30 18:01:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:44,945 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:44,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:44,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-30 18:01:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:45,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 18:01:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:45,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:45,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:45,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:45,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806605549] [2021-08-30 18:01:45,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806605549] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:45,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:45,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-30 18:01:45,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195954216] [2021-08-30 18:01:45,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:01:45,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:01:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:45,093 INFO L87 Difference]: Start difference. First operand 163 states and 168 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:45,339 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2021-08-30 18:01:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 18:01:45,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 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 7 [2021-08-30 18:01:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:45,341 INFO L225 Difference]: With dead ends: 160 [2021-08-30 18:01:45,341 INFO L226 Difference]: Without dead ends: 160 [2021-08-30 18:01:45,341 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.83ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:45,342 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 156 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 235.78ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:45,342 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 9 Invalid, 171 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 235.78ms Time] [2021-08-30 18:01:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-30 18:01:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-08-30 18:01:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 86 states have (on average 1.8837209302325582) internal successors, (162), 156 states have internal predecessors, (162), 2 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) [2021-08-30 18:01:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2021-08-30 18:01:45,347 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 7 [2021-08-30 18:01:45,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:45,347 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2021-08-30 18:01:45,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2021-08-30 18:01:45,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 18:01:45,348 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:45,348 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:45,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:45,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:45,557 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:45,557 INFO L82 PathProgramCache]: Analyzing trace with hash -352660203, now seen corresponding path program 1 times [2021-08-30 18:01:45,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:45,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10160609] [2021-08-30 18:01:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:45,558 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:45,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:45,559 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:45,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-30 18:01:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-30 18:01:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:45,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:45,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:45,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:45,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10160609] [2021-08-30 18:01:45,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10160609] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:45,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:45,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-30 18:01:45,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108313920] [2021-08-30 18:01:45,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 18:01:45,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 18:01:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 18:01:45,694 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:45,922 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2021-08-30 18:01:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 18:01:45,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 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 11 [2021-08-30 18:01:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:45,924 INFO L225 Difference]: With dead ends: 159 [2021-08-30 18:01:45,924 INFO L226 Difference]: Without dead ends: 159 [2021-08-30 18:01:45,924 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.78ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 18:01:45,925 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 133 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 184.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 223.15ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:45,926 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 6 Invalid, 189 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [10 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 223.15ms Time] [2021-08-30 18:01:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-30 18:01:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-08-30 18:01:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 88 states have (on average 1.8068181818181819) internal successors, (159), 151 states have internal predecessors, (159), 2 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) [2021-08-30 18:01:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 162 transitions. [2021-08-30 18:01:45,930 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 162 transitions. Word has length 11 [2021-08-30 18:01:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:45,931 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 162 transitions. [2021-08-30 18:01:45,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 162 transitions. [2021-08-30 18:01:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 18:01:45,931 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:45,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:45,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-08-30 18:01:46,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:46,138 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash -352660202, now seen corresponding path program 1 times [2021-08-30 18:01:46,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:46,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432246553] [2021-08-30 18:01:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:46,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:46,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:46,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:46,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-30 18:01:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:46,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 18:01:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:46,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:46,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:46,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:46,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432246553] [2021-08-30 18:01:46,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432246553] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:46,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:46,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-30 18:01:46,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890964651] [2021-08-30 18:01:46,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:01:46,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:01:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:46,292 INFO L87 Difference]: Start difference. First operand 155 states and 162 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:46,617 INFO L93 Difference]: Finished difference Result 172 states and 178 transitions. [2021-08-30 18:01:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:01:46,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 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 11 [2021-08-30 18:01:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:46,618 INFO L225 Difference]: With dead ends: 172 [2021-08-30 18:01:46,618 INFO L226 Difference]: Without dead ends: 172 [2021-08-30 18:01:46,618 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.48ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:46,619 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 143 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 267.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 317.65ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:46,619 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 9 Invalid, 229 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 317.65ms Time] [2021-08-30 18:01:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-30 18:01:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 159. [2021-08-30 18:01:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 95 states have (on average 1.7157894736842105) internal successors, (163), 155 states have internal predecessors, (163), 2 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) [2021-08-30 18:01:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 166 transitions. [2021-08-30 18:01:46,623 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 166 transitions. Word has length 11 [2021-08-30 18:01:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:46,623 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 166 transitions. [2021-08-30 18:01:46,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 166 transitions. [2021-08-30 18:01:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 18:01:46,624 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:46,624 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:46,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:46,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:46,831 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:46,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2117333470, now seen corresponding path program 1 times [2021-08-30 18:01:46,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:46,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159214726] [2021-08-30 18:01:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:46,832 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:46,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:46,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-30 18:01:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:46,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 18:01:46,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:46,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:46,983 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-30 18:01:46,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-08-30 18:01:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:46,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:47,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:47,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159214726] [2021-08-30 18:01:47,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159214726] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:47,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:47,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-30 18:01:47,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065907961] [2021-08-30 18:01:47,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:01:47,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:47,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:01:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:01:47,035 INFO L87 Difference]: Start difference. First operand 159 states and 166 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:47,354 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2021-08-30 18:01:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:01:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 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 16 [2021-08-30 18:01:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:47,355 INFO L225 Difference]: With dead ends: 160 [2021-08-30 18:01:47,355 INFO L226 Difference]: Without dead ends: 160 [2021-08-30 18:01:47,355 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.18ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:01:47,356 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 211 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 260.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 306.93ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:47,356 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 9 Invalid, 242 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [26 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 306.93ms Time] [2021-08-30 18:01:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-30 18:01:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 146. [2021-08-30 18:01:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 97 states have (on average 1.5670103092783505) internal successors, (152), 142 states have internal predecessors, (152), 2 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) [2021-08-30 18:01:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 155 transitions. [2021-08-30 18:01:47,360 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 155 transitions. Word has length 16 [2021-08-30 18:01:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:47,360 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 155 transitions. [2021-08-30 18:01:47,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 155 transitions. [2021-08-30 18:01:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 18:01:47,360 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:47,361 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:47,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:47,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:47,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:47,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:47,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2117333471, now seen corresponding path program 1 times [2021-08-30 18:01:47,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:47,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573992350] [2021-08-30 18:01:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:47,569 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:47,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:47,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:47,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-30 18:01:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:47,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 18:01:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:47,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:47,743 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 18:01:47,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-30 18:01:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:47,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:47,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:47,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573992350] [2021-08-30 18:01:47,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573992350] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:47,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:47,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-08-30 18:01:47,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551514731] [2021-08-30 18:01:47,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:01:47,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:47,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:01:47,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:01:47,923 INFO L87 Difference]: Start difference. First operand 146 states and 155 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:48,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:48,208 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2021-08-30 18:01:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:01:48,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 1 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 16 [2021-08-30 18:01:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:48,209 INFO L225 Difference]: With dead ends: 170 [2021-08-30 18:01:48,209 INFO L226 Difference]: Without dead ends: 170 [2021-08-30 18:01:48,209 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.05ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:01:48,210 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 140 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 242.74ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:48,211 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 15 Invalid, 400 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 202 Unchecked, 242.74ms Time] [2021-08-30 18:01:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-30 18:01:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2021-08-30 18:01:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 104 states have (on average 1.5576923076923077) internal successors, (162), 149 states have internal predecessors, (162), 2 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) [2021-08-30 18:01:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 165 transitions. [2021-08-30 18:01:48,215 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 165 transitions. Word has length 16 [2021-08-30 18:01:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:48,216 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 165 transitions. [2021-08-30 18:01:48,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 165 transitions. [2021-08-30 18:01:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-30 18:01:48,216 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:48,216 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:48,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:48,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:48,417 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr45ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:48,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:48,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1056980816, now seen corresponding path program 1 times [2021-08-30 18:01:48,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:48,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016619246] [2021-08-30 18:01:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:48,418 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:48,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:48,420 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:48,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-30 18:01:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:48,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 18:01:48,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:48,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:48,539 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:01:48,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-08-30 18:01:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:48,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:48,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:48,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016619246] [2021-08-30 18:01:48,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016619246] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:48,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:48,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-30 18:01:48,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805200528] [2021-08-30 18:01:48,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 18:01:48,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 18:01:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:01:48,605 INFO L87 Difference]: Start difference. First operand 153 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:48,983 INFO L93 Difference]: Finished difference Result 202 states and 211 transitions. [2021-08-30 18:01:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:01:48,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 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 18 [2021-08-30 18:01:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:48,985 INFO L225 Difference]: With dead ends: 202 [2021-08-30 18:01:48,986 INFO L226 Difference]: Without dead ends: 202 [2021-08-30 18:01:48,986 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.29ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:01:48,986 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 308 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 297.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 357.52ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:48,986 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 12 Invalid, 354 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [22 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 357.52ms Time] [2021-08-30 18:01:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-30 18:01:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 151. [2021-08-30 18:01:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 103 states have (on average 1.5339805825242718) internal successors, (158), 147 states have internal predecessors, (158), 2 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) [2021-08-30 18:01:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2021-08-30 18:01:48,991 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 18 [2021-08-30 18:01:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:48,991 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2021-08-30 18:01:48,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2021-08-30 18:01:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 18:01:48,992 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:48,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:49,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:49,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:49,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:49,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1593337329, now seen corresponding path program 1 times [2021-08-30 18:01:49,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:49,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980630490] [2021-08-30 18:01:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:49,200 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:49,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:49,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:49,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-30 18:01:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:49,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 18:01:49,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:49,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:49,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:49,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:49,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980630490] [2021-08-30 18:01:49,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980630490] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:49,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:49,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-30 18:01:49,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536820206] [2021-08-30 18:01:49,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:01:49,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:49,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:01:49,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:01:49,527 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:50,209 INFO L93 Difference]: Finished difference Result 168 states and 176 transitions. [2021-08-30 18:01:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 18:01:50,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 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 19 [2021-08-30 18:01:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:50,210 INFO L225 Difference]: With dead ends: 168 [2021-08-30 18:01:50,210 INFO L226 Difference]: Without dead ends: 168 [2021-08-30 18:01:50,210 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.80ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:01:50,211 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 185 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 542.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 647.10ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:50,211 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 15 Invalid, 426 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [17 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 647.10ms Time] [2021-08-30 18:01:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-30 18:01:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 152. [2021-08-30 18:01:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 106 states have (on average 1.5) internal successors, (159), 148 states have internal predecessors, (159), 2 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) [2021-08-30 18:01:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 162 transitions. [2021-08-30 18:01:50,214 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 162 transitions. Word has length 19 [2021-08-30 18:01:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:50,214 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 162 transitions. [2021-08-30 18:01:50,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 162 transitions. [2021-08-30 18:01:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 18:01:50,214 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:50,214 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:50,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:50,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:50,415 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:50,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1591729511, now seen corresponding path program 1 times [2021-08-30 18:01:50,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:50,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356242636] [2021-08-30 18:01:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:50,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:50,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:50,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:50,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-08-30 18:01:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:50,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 18:01:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:50,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:50,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-30 18:01:50,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-30 18:01:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:50,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:50,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:50,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356242636] [2021-08-30 18:01:50,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356242636] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:50,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:50,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-30 18:01:50,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990085313] [2021-08-30 18:01:50,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 18:01:50,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 18:01:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:01:50,615 INFO L87 Difference]: Start difference. First operand 152 states and 162 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:51,120 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2021-08-30 18:01:51,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 18:01:51,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 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 19 [2021-08-30 18:01:51,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:51,122 INFO L225 Difference]: With dead ends: 151 [2021-08-30 18:01:51,122 INFO L226 Difference]: Without dead ends: 151 [2021-08-30 18:01:51,122 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.85ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:01:51,122 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 396.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 482.80ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:51,122 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 515 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [2 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 482.80ms Time] [2021-08-30 18:01:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-30 18:01:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-08-30 18:01:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 106 states have (on average 1.4811320754716981) internal successors, (157), 147 states have internal predecessors, (157), 2 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) [2021-08-30 18:01:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2021-08-30 18:01:51,125 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 19 [2021-08-30 18:01:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:51,125 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2021-08-30 18:01:51,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2021-08-30 18:01:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 18:01:51,125 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:51,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:51,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:51,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:51,326 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:51,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1591729512, now seen corresponding path program 1 times [2021-08-30 18:01:51,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:51,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889763865] [2021-08-30 18:01:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:51,327 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:51,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:51,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:51,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-08-30 18:01:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:51,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 18:01:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:51,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:51,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-30 18:01:51,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:01:51,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-08-30 18:01:51,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-30 18:01:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:51,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:51,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:51,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889763865] [2021-08-30 18:01:51,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889763865] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:51,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:51,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-08-30 18:01:51,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611611557] [2021-08-30 18:01:51,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 18:01:51,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 18:01:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:01:51,643 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:53,026 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2021-08-30 18:01:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:01:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 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 19 [2021-08-30 18:01:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:53,027 INFO L225 Difference]: With dead ends: 150 [2021-08-30 18:01:53,027 INFO L226 Difference]: Without dead ends: 150 [2021-08-30 18:01:53,027 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 141.82ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:01:53,028 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1134.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.48ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1310.27ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:53,028 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 774 Unknown, 0 Unchecked, 2.48ms Time], IncrementalHoareTripleChecker [2 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 1310.27ms Time] [2021-08-30 18:01:53,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-30 18:01:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-08-30 18:01:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 106 states have (on average 1.4622641509433962) internal successors, (155), 146 states have internal predecessors, (155), 2 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) [2021-08-30 18:01:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2021-08-30 18:01:53,030 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 19 [2021-08-30 18:01:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:53,030 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2021-08-30 18:01:53,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2021-08-30 18:01:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 18:01:53,031 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:53,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:53,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:53,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:53,231 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:53,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2106147056, now seen corresponding path program 1 times [2021-08-30 18:01:53,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:53,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070250151] [2021-08-30 18:01:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:53,232 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:53,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:53,234 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:53,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-08-30 18:01:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:53,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 18:01:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:53,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-30 18:01:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-30 18:01:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:53,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:53,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:53,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070250151] [2021-08-30 18:01:53,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070250151] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:53,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:53,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-08-30 18:01:53,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199888701] [2021-08-30 18:01:53,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 18:01:53,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 18:01:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:01:53,548 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:01:54,360 INFO L93 Difference]: Finished difference Result 204 states and 216 transitions. [2021-08-30 18:01:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 18:01:54,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (2), 1 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 21 [2021-08-30 18:01:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:01:54,361 INFO L225 Difference]: With dead ends: 204 [2021-08-30 18:01:54,361 INFO L226 Difference]: Without dead ends: 204 [2021-08-30 18:01:54,361 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.63ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:01:54,362 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 192 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 645.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 770.63ms IncrementalHoareTripleChecker+Time [2021-08-30 18:01:54,362 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 21 Invalid, 821 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [15 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 770.63ms Time] [2021-08-30 18:01:54,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-30 18:01:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 155. [2021-08-30 18:01:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.4414414414414414) internal successors, (160), 151 states have internal predecessors, (160), 2 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) [2021-08-30 18:01:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2021-08-30 18:01:54,365 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 21 [2021-08-30 18:01:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:01:54,365 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2021-08-30 18:01:54,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:01:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2021-08-30 18:01:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 18:01:54,366 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:01:54,366 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:01:54,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-08-30 18:01:54,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:01:54,573 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:01:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:01:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash 124262505, now seen corresponding path program 1 times [2021-08-30 18:01:54,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:01:54,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448647497] [2021-08-30 18:01:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:01:54,574 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:01:54,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:01:54,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:01:54,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-08-30 18:01:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:01:54,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 18:01:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:01:54,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:01:54,779 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-30 18:01:54,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-08-30 18:01:54,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-08-30 18:01:54,926 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-30 18:01:54,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-08-30 18:01:55,006 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:01:55,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 43 [2021-08-30 18:01:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:55,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:01:59,886 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |main_#t~mem7.offset|) c_main_~end~0.base))) c_main_~end~0.base) c_main_~end~0.offset)))))))))) (_ bv1 1)))) is different from false [2021-08-30 18:01:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:01:59,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:01:59,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448647497] [2021-08-30 18:01:59,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448647497] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:01:59,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:01:59,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [] total 14 [2021-08-30 18:01:59,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83403066] [2021-08-30 18:01:59,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 18:01:59,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:01:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 18:01:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=134, Unknown=5, NotChecked=24, Total=210 [2021-08-30 18:01:59,945 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:00,483 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2021-08-30 18:02:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 18:02:00,483 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (2), 1 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 23 [2021-08-30 18:02:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:00,484 INFO L225 Difference]: With dead ends: 186 [2021-08-30 18:02:00,484 INFO L226 Difference]: Without dead ends: 186 [2021-08-30 18:02:00,484 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 4958.84ms TimeCoverageRelationStatistics Valid=69, Invalid=202, Unknown=5, NotChecked=30, Total=306 [2021-08-30 18:02:00,485 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 384.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 714 IncrementalHoareTripleChecker+Unchecked, 462.29ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:00,485 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 1172 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [2 Valid, 456 Invalid, 0 Unknown, 714 Unchecked, 462.29ms Time] [2021-08-30 18:02:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-30 18:02:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 154. [2021-08-30 18:02:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 111 states have (on average 1.4324324324324325) internal successors, (159), 150 states have internal predecessors, (159), 2 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) [2021-08-30 18:02:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2021-08-30 18:02:00,488 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 23 [2021-08-30 18:02:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:00,488 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2021-08-30 18:02:00,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2021-08-30 18:02:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 18:02:00,488 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:00,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:02:00,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-08-30 18:02:00,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:00,689 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash 124262506, now seen corresponding path program 1 times [2021-08-30 18:02:00,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:00,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867643211] [2021-08-30 18:02:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:00,691 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:00,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:00,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:00,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-08-30 18:02:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:00,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-30 18:02:00,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:00,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:02:00,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:02:00,860 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:02:00,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-30 18:02:00,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:02:00,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 18:02:00,956 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-30 18:02:00,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-08-30 18:02:00,967 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-30 18:02:00,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-08-30 18:02:01,025 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:02:01,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2021-08-30 18:02:01,029 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:02:01,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-08-30 18:02:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:01,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:12,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 18:02:12,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 18:02:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:12,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:12,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867643211] [2021-08-30 18:02:12,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867643211] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:12,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:12,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-08-30 18:02:12,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323356660] [2021-08-30 18:02:12,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-30 18:02:12,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-30 18:02:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2021-08-30 18:02:12,465 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:24,507 WARN L210 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-08-30 18:02:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:26,062 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2021-08-30 18:02:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-30 18:02:26,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 1 states have call successors, (2), 1 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 23 [2021-08-30 18:02:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:26,063 INFO L225 Difference]: With dead ends: 210 [2021-08-30 18:02:26,064 INFO L226 Difference]: Without dead ends: 210 [2021-08-30 18:02:26,064 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 23309.68ms TimeCoverageRelationStatistics Valid=265, Invalid=993, Unknown=2, NotChecked=0, Total=1260 [2021-08-30 18:02:26,064 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 257 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1381.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.08ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 1586.34ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:26,065 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 33 Invalid, 1212 Unknown, 0 Unchecked, 6.08ms Time], IncrementalHoareTripleChecker [48 Valid, 854 Invalid, 0 Unknown, 310 Unchecked, 1586.34ms Time] [2021-08-30 18:02:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-08-30 18:02:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 145. [2021-08-30 18:02:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 111 states have (on average 1.3513513513513513) internal successors, (150), 141 states have internal predecessors, (150), 2 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) [2021-08-30 18:02:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 153 transitions. [2021-08-30 18:02:26,068 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 153 transitions. Word has length 23 [2021-08-30 18:02:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:26,068 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 153 transitions. [2021-08-30 18:02:26,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 153 transitions. [2021-08-30 18:02:26,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 18:02:26,069 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:26,069 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:02:26,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:26,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:26,277 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:26,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1488771985, now seen corresponding path program 1 times [2021-08-30 18:02:26,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:26,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459590262] [2021-08-30 18:02:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:26,278 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:26,279 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:26,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-08-30 18:02:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:26,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 18:02:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:26,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-30 18:02:26,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-30 18:02:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:26,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:26,585 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:26,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459590262] [2021-08-30 18:02:26,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459590262] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:26,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:26,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-08-30 18:02:26,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762594279] [2021-08-30 18:02:26,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 18:02:26,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 18:02:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:02:26,586 INFO L87 Difference]: Start difference. First operand 145 states and 153 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:27,419 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2021-08-30 18:02:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 18:02:27,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (2), 1 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 28 [2021-08-30 18:02:27,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:27,420 INFO L225 Difference]: With dead ends: 192 [2021-08-30 18:02:27,420 INFO L226 Difference]: Without dead ends: 192 [2021-08-30 18:02:27,420 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 86.82ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-30 18:02:27,421 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 230 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 657.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.38ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 781.73ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:27,421 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 18 Invalid, 762 Unknown, 0 Unchecked, 2.38ms Time], IncrementalHoareTripleChecker [21 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 781.73ms Time] [2021-08-30 18:02:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-30 18:02:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 149. [2021-08-30 18:02:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 115 states have (on average 1.3391304347826087) internal successors, (154), 145 states have internal predecessors, (154), 2 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) [2021-08-30 18:02:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2021-08-30 18:02:27,423 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 28 [2021-08-30 18:02:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:27,424 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2021-08-30 18:02:27,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2021-08-30 18:02:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 18:02:27,425 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:27,426 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-08-30 18:02:27,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:27,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:27,633 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:27,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790238, now seen corresponding path program 1 times [2021-08-30 18:02:27,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:27,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432094554] [2021-08-30 18:02:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:27,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:27,635 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:27,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-08-30 18:02:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:27,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 18:02:27,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:27,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:02:27,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:02:27,803 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-08-30 18:02:27,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-08-30 18:02:27,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:02:27,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-08-30 18:02:27,865 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-30 18:02:27,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-08-30 18:02:27,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:02:27,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:02:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:02:27,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-08-30 18:02:28,153 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-30 18:02:28,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-08-30 18:02:28,157 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-30 18:02:28,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-08-30 18:02:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:28,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:28,367 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:28,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432094554] [2021-08-30 18:02:28,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432094554] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:02:28,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:02:28,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-30 18:02:28,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119900576] [2021-08-30 18:02:28,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 18:02:28,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 18:02:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-30 18:02:28,368 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:29,264 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2021-08-30 18:02:29,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 18:02:29,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 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 28 [2021-08-30 18:02:29,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:29,265 INFO L225 Difference]: With dead ends: 171 [2021-08-30 18:02:29,265 INFO L226 Difference]: Without dead ends: 171 [2021-08-30 18:02:29,266 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 260.16ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-08-30 18:02:29,266 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 237 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 653.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 770.89ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:29,266 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 18 Invalid, 745 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [25 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 770.89ms Time] [2021-08-30 18:02:29,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-30 18:02:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2021-08-30 18:02:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 148 states have internal predecessors, (157), 2 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) [2021-08-30 18:02:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2021-08-30 18:02:29,269 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 28 [2021-08-30 18:02:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:29,269 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2021-08-30 18:02:29,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2021-08-30 18:02:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 18:02:29,269 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:29,269 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:02:29,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:29,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:29,477 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr40ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:29,478 INFO L82 PathProgramCache]: Analyzing trace with hash 66805131, now seen corresponding path program 1 times [2021-08-30 18:02:29,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:29,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592436556] [2021-08-30 18:02:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:29,478 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:29,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:29,479 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:29,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-08-30 18:02:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:29,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 18:02:29,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:29,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-30 18:02:29,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-08-30 18:02:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:29,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:29,683 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:29,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592436556] [2021-08-30 18:02:29,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592436556] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:29,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:29,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-30 18:02:29,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454276871] [2021-08-30 18:02:29,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:02:29,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:02:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:02:29,685 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:30,083 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2021-08-30 18:02:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:02:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 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 28 [2021-08-30 18:02:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:30,084 INFO L225 Difference]: With dead ends: 150 [2021-08-30 18:02:30,084 INFO L226 Difference]: Without dead ends: 150 [2021-08-30 18:02:30,084 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.44ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:02:30,084 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 321.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.65ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 385.46ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:30,085 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 9 Invalid, 361 Unknown, 0 Unchecked, 0.65ms Time], IncrementalHoareTripleChecker [3 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 385.46ms Time] [2021-08-30 18:02:30,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-30 18:02:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-08-30 18:02:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 117 states have (on average 1.3247863247863247) internal successors, (155), 146 states have internal predecessors, (155), 2 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) [2021-08-30 18:02:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2021-08-30 18:02:30,087 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 28 [2021-08-30 18:02:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:30,087 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2021-08-30 18:02:30,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2021-08-30 18:02:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 18:02:30,088 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:30,088 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:02:30,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:30,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:30,288 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:30,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:30,289 INFO L82 PathProgramCache]: Analyzing trace with hash 36943448, now seen corresponding path program 1 times [2021-08-30 18:02:30,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:30,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268780670] [2021-08-30 18:02:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:30,289 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:30,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:30,290 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:30,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-08-30 18:02:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:30,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 18:02:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:02:30,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 18:02:30,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-30 18:02:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:30,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:30,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:30,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268780670] [2021-08-30 18:02:30,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268780670] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:30,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:30,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-30 18:02:30,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073725543] [2021-08-30 18:02:30,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 18:02:30,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:30,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 18:02:30,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:02:30,506 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:30,970 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2021-08-30 18:02:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 18:02:30,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 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 30 [2021-08-30 18:02:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:30,971 INFO L225 Difference]: With dead ends: 149 [2021-08-30 18:02:30,971 INFO L226 Difference]: Without dead ends: 149 [2021-08-30 18:02:30,971 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.28ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:02:30,972 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 374.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 443.58ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:30,972 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 462 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [2 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 443.58ms Time] [2021-08-30 18:02:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-30 18:02:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-08-30 18:02:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.3162393162393162) internal successors, (154), 145 states have internal predecessors, (154), 2 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) [2021-08-30 18:02:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2021-08-30 18:02:30,974 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 30 [2021-08-30 18:02:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:30,974 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2021-08-30 18:02:30,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2021-08-30 18:02:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 18:02:30,975 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:30,975 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:02:30,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:31,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:31,181 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:31,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:31,182 INFO L82 PathProgramCache]: Analyzing trace with hash 36943449, now seen corresponding path program 1 times [2021-08-30 18:02:31,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:31,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395621459] [2021-08-30 18:02:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:31,182 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:31,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:31,183 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:31,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-08-30 18:02:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:31,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 18:02:31,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:31,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:02:31,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-30 18:02:31,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:02:31,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-08-30 18:02:31,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-30 18:02:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:31,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:31,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:31,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395621459] [2021-08-30 18:02:31,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395621459] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:31,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:31,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-08-30 18:02:31,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539577263] [2021-08-30 18:02:31,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 18:02:31,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:31,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 18:02:31,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:02:31,546 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:32,878 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-08-30 18:02:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:02:32,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 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 30 [2021-08-30 18:02:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:32,879 INFO L225 Difference]: With dead ends: 148 [2021-08-30 18:02:32,879 INFO L226 Difference]: Without dead ends: 148 [2021-08-30 18:02:32,879 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 154.68ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:02:32,880 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1100.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1269.26ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:32,880 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 804 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [2 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1269.26ms Time] [2021-08-30 18:02:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-30 18:02:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-08-30 18:02:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 117 states have (on average 1.3076923076923077) internal successors, (153), 144 states have internal predecessors, (153), 2 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) [2021-08-30 18:02:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 156 transitions. [2021-08-30 18:02:32,884 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 156 transitions. Word has length 30 [2021-08-30 18:02:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:32,884 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 156 transitions. [2021-08-30 18:02:32,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 156 transitions. [2021-08-30 18:02:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 18:02:32,885 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:32,885 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:02:32,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:33,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:33,093 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:33,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1625836410, now seen corresponding path program 1 times [2021-08-30 18:02:33,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:33,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533549297] [2021-08-30 18:02:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:33,097 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:33,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:33,098 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:33,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-08-30 18:02:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 18:02:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:33,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:02:33,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:02:33,361 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-30 18:02:33,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-08-30 18:02:33,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:02:33,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-08-30 18:02:33,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-30 18:02:33,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-08-30 18:02:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:33,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:33,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:33,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533549297] [2021-08-30 18:02:33,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533549297] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:33,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:33,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-08-30 18:02:33,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662253756] [2021-08-30 18:02:33,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:02:33,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:33,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:02:33,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:02:33,520 INFO L87 Difference]: Start difference. First operand 148 states and 156 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:34,084 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-08-30 18:02:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:02:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (2), 1 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 31 [2021-08-30 18:02:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:34,085 INFO L225 Difference]: With dead ends: 146 [2021-08-30 18:02:34,085 INFO L226 Difference]: Without dead ends: 146 [2021-08-30 18:02:34,086 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.62ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:02:34,086 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 457.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 541.56ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:34,086 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 15 Invalid, 441 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [6 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 541.56ms Time] [2021-08-30 18:02:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-30 18:02:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-08-30 18:02:34,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 116 states have (on average 1.3017241379310345) internal successors, (151), 142 states have internal predecessors, (151), 2 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) [2021-08-30 18:02:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2021-08-30 18:02:34,088 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 31 [2021-08-30 18:02:34,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:34,088 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2021-08-30 18:02:34,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2021-08-30 18:02:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-30 18:02:34,089 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:34,089 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 18:02:34,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:34,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:34,290 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:34,290 INFO L82 PathProgramCache]: Analyzing trace with hash -939174818, now seen corresponding path program 1 times [2021-08-30 18:02:34,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:34,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157688716] [2021-08-30 18:02:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:34,291 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:34,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:34,291 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:34,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-08-30 18:02:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:34,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 18:02:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:34,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:02:34,478 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-30 18:02:34,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-08-30 18:02:34,570 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-30 18:02:34,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-08-30 18:02:34,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-30 18:02:34,648 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-30 18:02:34,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-08-30 18:02:34,706 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:02:34,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2021-08-30 18:02:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:34,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:35,790 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (not (= c_main_~null~0.base (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem7.base|) (bvadd (_ bv4 32) |main_#t~mem7.offset|) c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset)))) is different from false [2021-08-30 18:02:36,865 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |main_#t~mem7.offset|) c_main_~end~0.base))) c_main_~end~0.base) c_main_~end~0.offset) c_main_~null~0.base))) is different from false [2021-08-30 18:02:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:36,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:36,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157688716] [2021-08-30 18:02:36,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157688716] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:36,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:36,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 9] imperfect sequences [] total 15 [2021-08-30 18:02:36,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828811787] [2021-08-30 18:02:36,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 18:02:36,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 18:02:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=127, Unknown=2, NotChecked=46, Total=210 [2021-08-30 18:02:36,935 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:37,694 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2021-08-30 18:02:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 18:02:37,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (2), 1 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 33 [2021-08-30 18:02:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:37,695 INFO L225 Difference]: With dead ends: 177 [2021-08-30 18:02:37,695 INFO L226 Difference]: Without dead ends: 177 [2021-08-30 18:02:37,695 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2233.60ms TimeCoverageRelationStatistics Valid=47, Invalid=169, Unknown=2, NotChecked=54, Total=272 [2021-08-30 18:02:37,705 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 575.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 679.47ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:37,705 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 1053 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [1 Valid, 687 Invalid, 0 Unknown, 365 Unchecked, 679.47ms Time] [2021-08-30 18:02:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-30 18:02:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2021-08-30 18:02:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 127 states have (on average 1.2834645669291338) internal successors, (163), 153 states have internal predecessors, (163), 2 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) [2021-08-30 18:02:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 166 transitions. [2021-08-30 18:02:37,707 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 166 transitions. Word has length 33 [2021-08-30 18:02:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:37,708 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 166 transitions. [2021-08-30 18:02:37,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 166 transitions. [2021-08-30 18:02:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 18:02:37,708 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:37,708 INFO L513 BasicCegarLoop]: trace histogram [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, 1] [2021-08-30 18:02:37,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:37,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:37,919 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr64ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:37,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:37,919 INFO L82 PathProgramCache]: Analyzing trace with hash 703031177, now seen corresponding path program 1 times [2021-08-30 18:02:37,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:37,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309641452] [2021-08-30 18:02:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:37,919 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:37,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:37,920 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:37,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-08-30 18:02:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:38,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 18:02:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:38,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-30 18:02:38,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-08-30 18:02:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:02:38,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:02:38,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:38,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309641452] [2021-08-30 18:02:38,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309641452] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:38,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:38,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-08-30 18:02:38,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42417893] [2021-08-30 18:02:38,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:02:38,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:02:38,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:02:38,190 INFO L87 Difference]: Start difference. First operand 157 states and 166 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:38,776 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2021-08-30 18:02:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:02:38,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 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 34 [2021-08-30 18:02:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:38,777 INFO L225 Difference]: With dead ends: 166 [2021-08-30 18:02:38,777 INFO L226 Difference]: Without dead ends: 166 [2021-08-30 18:02:38,777 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.85ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:02:38,777 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 472.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 565.32ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:38,777 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 460 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [2 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 565.32ms Time] [2021-08-30 18:02:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-30 18:02:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-08-30 18:02:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 130 states have (on average 1.2769230769230768) internal successors, (166), 156 states have internal predecessors, (166), 2 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) [2021-08-30 18:02:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2021-08-30 18:02:38,780 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 34 [2021-08-30 18:02:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:38,780 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2021-08-30 18:02:38,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2021-08-30 18:02:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 18:02:38,780 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:38,780 INFO L513 BasicCegarLoop]: trace histogram [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, 1] [2021-08-30 18:02:38,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-08-30 18:02:38,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:38,981 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr74ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:38,982 INFO L82 PathProgramCache]: Analyzing trace with hash 724025887, now seen corresponding path program 1 times [2021-08-30 18:02:38,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:38,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718254681] [2021-08-30 18:02:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:38,982 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:38,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:38,983 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:38,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-08-30 18:02:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-30 18:02:39,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:02:39,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:02:39,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:39,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718254681] [2021-08-30 18:02:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718254681] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:39,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:39,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-30 18:02:39,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719389423] [2021-08-30 18:02:39,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 18:02:39,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:39,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 18:02:39,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 18:02:39,232 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:39,513 INFO L93 Difference]: Finished difference Result 162 states and 171 transitions. [2021-08-30 18:02:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 18:02:39,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 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 34 [2021-08-30 18:02:39,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:39,514 INFO L225 Difference]: With dead ends: 162 [2021-08-30 18:02:39,514 INFO L226 Difference]: Without dead ends: 162 [2021-08-30 18:02:39,514 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.76ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 18:02:39,514 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 225.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 273.85ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:39,514 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 6 Invalid, 157 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 273.85ms Time] [2021-08-30 18:02:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-08-30 18:02:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-08-30 18:02:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 132 states have (on average 1.2727272727272727) internal successors, (168), 158 states have internal predecessors, (168), 2 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) [2021-08-30 18:02:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2021-08-30 18:02:39,517 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 34 [2021-08-30 18:02:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:39,517 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2021-08-30 18:02:39,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2021-08-30 18:02:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 18:02:39,517 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:39,517 INFO L513 BasicCegarLoop]: trace histogram [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, 1] [2021-08-30 18:02:39,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:39,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:39,718 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:39,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:39,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1167972262, now seen corresponding path program 1 times [2021-08-30 18:02:39,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:39,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784837094] [2021-08-30 18:02:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:39,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:39,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:39,720 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:39,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-08-30 18:02:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:39,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 18:02:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:39,927 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-30 18:02:39,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-08-30 18:02:39,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-30 18:02:40,045 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-30 18:02:40,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2021-08-30 18:02:40,101 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:02:40,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 46 [2021-08-30 18:02:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:40,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:42,258 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem11.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd |main_#t~mem11.offset| (_ bv4 32)) c_main_~end~0.base))) c_main_~end~0.base) c_main_~end~0.offset))))))))))) is different from false [2021-08-30 18:02:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:42,313 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:42,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784837094] [2021-08-30 18:02:42,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784837094] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:42,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:42,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 13 [2021-08-30 18:02:42,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054716939] [2021-08-30 18:02:42,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 18:02:42,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 18:02:42,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=114, Unknown=1, NotChecked=22, Total=182 [2021-08-30 18:02:42,314 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:42,772 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2021-08-30 18:02:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 18:02:42,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (2), 1 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 34 [2021-08-30 18:02:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:42,773 INFO L225 Difference]: With dead ends: 161 [2021-08-30 18:02:42,773 INFO L226 Difference]: Without dead ends: 161 [2021-08-30 18:02:42,773 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2175.52ms TimeCoverageRelationStatistics Valid=45, Invalid=114, Unknown=1, NotChecked=22, Total=182 [2021-08-30 18:02:42,774 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 375.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 444.10ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:42,774 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 782 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [8 Valid, 494 Invalid, 0 Unknown, 280 Unchecked, 444.10ms Time] [2021-08-30 18:02:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-30 18:02:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-08-30 18:02:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.2651515151515151) internal successors, (167), 157 states have internal predecessors, (167), 2 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) [2021-08-30 18:02:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 170 transitions. [2021-08-30 18:02:42,776 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 170 transitions. Word has length 34 [2021-08-30 18:02:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:42,776 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 170 transitions. [2021-08-30 18:02:42,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 170 transitions. [2021-08-30 18:02:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 18:02:42,776 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:42,776 INFO L513 BasicCegarLoop]: trace histogram [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, 1] [2021-08-30 18:02:42,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:42,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:42,985 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:42,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1167972261, now seen corresponding path program 1 times [2021-08-30 18:02:42,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:42,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179189635] [2021-08-30 18:02:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:42,986 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:42,987 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:42,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-08-30 18:02:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:43,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-30 18:02:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:43,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:02:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:02:43,198 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-30 18:02:43,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-08-30 18:02:43,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-08-30 18:02:43,322 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-30 18:02:43,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2021-08-30 18:02:43,387 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:02:43,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 52 [2021-08-30 18:02:43,554 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-30 18:02:43,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2021-08-30 18:02:43,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-08-30 18:02:43,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:02:43,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 18:02:43,685 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-30 18:02:43,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-08-30 18:02:43,697 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-30 18:02:43,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-08-30 18:02:43,769 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:02:43,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 47 [2021-08-30 18:02:43,773 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:02:43,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-08-30 18:02:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:43,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:02:49,628 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|main_#t~mem11.offset| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) (bvadd |main_#t~mem11.offset| (_ bv4 32)) c_main_~end~0.offset))) c_main_~end~0.base) c_main_~end~0.offset))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((|main_#t~mem11.offset| (_ BitVec 32))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset)) (.cse3 (bvadd |main_#t~mem11.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) .cse3 c_main_~end~0.offset)) c_main_~end~0.base) c_main_~end~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) .cse3 c_main_~end~0.base)) c_main_~end~0.base) c_main_~end~0.offset)))))) is different from false [2021-08-30 18:02:57,475 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem7.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~end~0.base) c_main_~end~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |main_#t~mem7.offset|) c_main_~end~0.base))) c_main_~end~0.base) c_main_~end~0.offset))))))))) (_ bv1 1)))) is different from false [2021-08-30 18:02:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:02:57,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:02:57,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179189635] [2021-08-30 18:02:57,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179189635] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:02:57,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:02:57,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 13] imperfect sequences [] total 26 [2021-08-30 18:02:57,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654012256] [2021-08-30 18:02:57,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-30 18:02:57,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:02:57,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-30 18:02:57,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=527, Unknown=4, NotChecked=94, Total=702 [2021-08-30 18:02:57,543 INFO L87 Difference]: Start difference. First operand 161 states and 170 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 27 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:59,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:02:59,122 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-08-30 18:02:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-30 18:02:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 27 states have internal predecessors, (56), 1 states have call successors, (2), 1 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 34 [2021-08-30 18:02:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:02:59,123 INFO L225 Difference]: With dead ends: 160 [2021-08-30 18:02:59,123 INFO L226 Difference]: Without dead ends: 160 [2021-08-30 18:02:59,123 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 13950.73ms TimeCoverageRelationStatistics Valid=124, Invalid=810, Unknown=4, NotChecked=118, Total=1056 [2021-08-30 18:02:59,123 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 77 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1082.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.67ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 1234.88ms IncrementalHoareTripleChecker+Time [2021-08-30 18:02:59,124 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 51 Invalid, 1478 Unknown, 0 Unchecked, 2.67ms Time], IncrementalHoareTripleChecker [17 Valid, 884 Invalid, 0 Unknown, 577 Unchecked, 1234.88ms Time] [2021-08-30 18:02:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-30 18:02:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-08-30 18:02:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 132 states have (on average 1.2575757575757576) internal successors, (166), 156 states have internal predecessors, (166), 2 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) [2021-08-30 18:02:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2021-08-30 18:02:59,126 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 34 [2021-08-30 18:02:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:02:59,126 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2021-08-30 18:02:59,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 27 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:02:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2021-08-30 18:02:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 18:02:59,126 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:02:59,126 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-08-30 18:02:59,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-08-30 18:02:59,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:02:59,333 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:02:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:02:59,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1847401674, now seen corresponding path program 1 times [2021-08-30 18:02:59,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:02:59,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053647613] [2021-08-30 18:02:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:02:59,334 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:02:59,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:02:59,335 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:02:59,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-08-30 18:02:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:02:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-30 18:02:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:02:59,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:02:59,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:02:59,568 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-30 18:02:59,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-08-30 18:02:59,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-08-30 18:02:59,693 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-30 18:02:59,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 38 [2021-08-30 18:02:59,761 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:02:59,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 47 [2021-08-30 18:02:59,924 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 18:02:59,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-30 18:02:59,942 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-30 18:02:59,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 43 [2021-08-30 18:02:59,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 18:02:59,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 18:03:00,078 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-30 18:03:00,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-08-30 18:03:00,091 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-30 18:03:00,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-08-30 18:03:00,169 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:03:00,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 47 [2021-08-30 18:03:00,173 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-30 18:03:00,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-08-30 18:03:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:03:00,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:03:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:03:21,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:03:21,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053647613] [2021-08-30 18:03:21,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053647613] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:03:21,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:03:21,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 12] imperfect sequences [] total 25 [2021-08-30 18:03:21,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398044163] [2021-08-30 18:03:21,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-30 18:03:21,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:03:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-30 18:03:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=567, Unknown=4, NotChecked=0, Total=650 [2021-08-30 18:03:21,817 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:03:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:03:23,540 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-08-30 18:03:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-30 18:03:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 1 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 35 [2021-08-30 18:03:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:03:23,541 INFO L225 Difference]: With dead ends: 160 [2021-08-30 18:03:23,541 INFO L226 Difference]: Without dead ends: 160 [2021-08-30 18:03:23,542 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 21887.66ms TimeCoverageRelationStatistics Valid=148, Invalid=1038, Unknown=4, NotChecked=0, Total=1190 [2021-08-30 18:03:23,542 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 114 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1155.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 1333.58ms IncrementalHoareTripleChecker+Time [2021-08-30 18:03:23,542 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 36 Invalid, 1096 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [24 Valid, 861 Invalid, 0 Unknown, 211 Unchecked, 1333.58ms Time] [2021-08-30 18:03:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-30 18:03:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-08-30 18:03:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 132 states have (on average 1.25) internal successors, (165), 155 states have internal predecessors, (165), 2 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) [2021-08-30 18:03:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 168 transitions. [2021-08-30 18:03:23,544 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 168 transitions. Word has length 35 [2021-08-30 18:03:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:03:23,544 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 168 transitions. [2021-08-30 18:03:23,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:03:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 168 transitions. [2021-08-30 18:03:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-30 18:03:23,545 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:03:23,545 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-08-30 18:03:23,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-08-30 18:03:23,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:03:23,754 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:03:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:03:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash 129788422, now seen corresponding path program 1 times [2021-08-30 18:03:23,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:03:23,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216652103] [2021-08-30 18:03:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:03:23,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:03:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:03:23,756 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:03:23,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-08-30 18:03:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:03:23,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-30 18:03:23,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:03:24,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-30 18:03:24,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-08-30 18:03:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:03:24,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:03:24,292 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-08-30 18:03:24,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-08-30 18:03:24,297 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 18:03:24,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-30 18:03:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:03:24,376 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:03:24,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216652103] [2021-08-30 18:03:24,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216652103] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:03:24,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:03:24,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-30 18:03:24,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191314821] [2021-08-30 18:03:24,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-30 18:03:24,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:03:24,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-30 18:03:24,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-30 18:03:24,378 INFO L87 Difference]: Start difference. First operand 159 states and 168 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:03:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:03:26,014 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2021-08-30 18:03:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 18:03:26,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 1 states have call successors, (2), 1 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 37 [2021-08-30 18:03:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:03:26,015 INFO L225 Difference]: With dead ends: 204 [2021-08-30 18:03:26,015 INFO L226 Difference]: Without dead ends: 204 [2021-08-30 18:03:26,015 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 341.55ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-08-30 18:03:26,016 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 232 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1243.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1456.93ms IncrementalHoareTripleChecker+Time [2021-08-30 18:03:26,016 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 39 Invalid, 1526 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [28 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1456.93ms Time] [2021-08-30 18:03:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-30 18:03:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 170. [2021-08-30 18:03:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 143 states have (on average 1.2447552447552448) internal successors, (178), 166 states have internal predecessors, (178), 2 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) [2021-08-30 18:03:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 181 transitions. [2021-08-30 18:03:26,018 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 181 transitions. Word has length 37 [2021-08-30 18:03:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:03:26,018 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 181 transitions. [2021-08-30 18:03:26,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:03:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 181 transitions. [2021-08-30 18:03:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-30 18:03:26,019 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:03:26,019 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-08-30 18:03:26,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-08-30 18:03:26,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:03:26,226 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr76ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 72 more)] === [2021-08-30 18:03:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:03:26,227 INFO L82 PathProgramCache]: Analyzing trace with hash -271526566, now seen corresponding path program 1 times [2021-08-30 18:03:26,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:03:26,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797047607] [2021-08-30 18:03:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:03:26,227 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:03:26,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:03:26,228 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 18:03:26,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-08-30 18:03:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 18:03:26,344 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 18:03:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 18:03:26,467 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-30 18:03:26,467 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 18:03:26,468 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr76ENSURES_VIOLATIONMEMORY_LEAK (76 of 77 remaining) [2021-08-30 18:03:26,470 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (75 of 77 remaining) [2021-08-30 18:03:26,470 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (74 of 77 remaining) [2021-08-30 18:03:26,470 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (73 of 77 remaining) [2021-08-30 18:03:26,470 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (72 of 77 remaining) [2021-08-30 18:03:26,470 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (71 of 77 remaining) [2021-08-30 18:03:26,470 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (70 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (69 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (68 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (67 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (66 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (65 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (64 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (63 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (62 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (61 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (60 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (59 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (58 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (57 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (56 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (55 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (54 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (53 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (52 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION (51 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION (50 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION (49 of 77 remaining) [2021-08-30 18:03:26,471 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION (48 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION (47 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION (46 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION (45 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION (44 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION (43 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION (42 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION (41 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION (40 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION (39 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION (38 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION (37 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION (36 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40ASSERT_VIOLATIONMEMORY_LEAK (35 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION (34 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION (33 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_LEAK (32 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ASSERT_VIOLATIONMEMORY_LEAK (31 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45ASSERT_VIOLATIONMEMORY_LEAK (30 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION (29 of 77 remaining) [2021-08-30 18:03:26,472 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION (28 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48ASSERT_VIOLATIONMEMORY_LEAK (27 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION (26 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50REQUIRES_VIOLATION (25 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION (24 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION (23 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53ASSERT_VIOLATIONMEMORY_LEAK (22 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION (21 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55REQUIRES_VIOLATION (20 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_LEAK (19 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57REQUIRES_VIOLATION (18 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58REQUIRES_VIOLATION (17 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59REQUIRES_VIOLATION (16 of 77 remaining) [2021-08-30 18:03:26,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60REQUIRES_VIOLATION (15 of 77 remaining) [2021-08-30 18:03:26,488 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr61REQUIRES_VIOLATION (14 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr62REQUIRES_VIOLATION (13 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr63ASSERT_VIOLATIONMEMORY_FREE (12 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr64ASSERT_VIOLATIONMEMORY_FREE (11 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr65ASSERT_VIOLATIONMEMORY_FREE (10 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr66REQUIRES_VIOLATION (9 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr67REQUIRES_VIOLATION (8 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr68ASSERT_VIOLATIONMEMORY_FREE (7 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr69ASSERT_VIOLATIONMEMORY_FREE (6 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr70ASSERT_VIOLATIONMEMORY_FREE (5 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr71REQUIRES_VIOLATION (4 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr72REQUIRES_VIOLATION (3 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr73ASSERT_VIOLATIONMEMORY_FREE (2 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr74ASSERT_VIOLATIONMEMORY_FREE (1 of 77 remaining) [2021-08-30 18:03:26,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr75ASSERT_VIOLATIONMEMORY_FREE (0 of 77 remaining) [2021-08-30 18:03:26,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-08-30 18:03:26,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 18:03:26,694 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 18:03:26,703 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 18:03:26,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 06:03:26 BoogieIcfgContainer [2021-08-30 18:03:26,734 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 18:03:26,735 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 18:03:26,735 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 18:03:26,735 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 18:03:26,735 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:43" (3/4) ... [2021-08-30 18:03:26,737 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-30 18:03:26,738 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 18:03:26,738 INFO L158 Benchmark]: Toolchain (without parser) took 103774.40ms. Allocated memory was 67.1MB in the beginning and 140.5MB in the end (delta: 73.4MB). Free memory was 46.4MB in the beginning and 115.3MB in the end (delta: -68.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 18:03:26,739 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory was 48.2MB in the beginning and 48.2MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 18:03:26,739 INFO L158 Benchmark]: CACSL2BoogieTranslator took 378.93ms. Allocated memory is still 67.1MB. Free memory was 46.2MB in the beginning and 41.3MB in the end (delta: 4.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-30 18:03:26,739 INFO L158 Benchmark]: Boogie Preprocessor took 39.24ms. Allocated memory is still 67.1MB. Free memory was 41.3MB in the beginning and 37.7MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 18:03:26,740 INFO L158 Benchmark]: RCFGBuilder took 514.01ms. Allocated memory is still 67.1MB. Free memory was 37.7MB in the beginning and 31.0MB in the end (delta: 6.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2021-08-30 18:03:26,740 INFO L158 Benchmark]: TraceAbstraction took 102823.90ms. Allocated memory was 67.1MB in the beginning and 140.5MB in the end (delta: 73.4MB). Free memory was 30.7MB in the beginning and 116.4MB in the end (delta: -85.6MB). Peak memory consumption was 69.8MB. Max. memory is 16.1GB. [2021-08-30 18:03:26,741 INFO L158 Benchmark]: Witness Printer took 3.51ms. Allocated memory is still 140.5MB. Free memory was 116.4MB in the beginning and 115.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 18:03:26,741 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory was 48.2MB in the beginning and 48.2MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 378.93ms. Allocated memory is still 67.1MB. Free memory was 46.2MB in the beginning and 41.3MB in the end (delta: 4.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.24ms. Allocated memory is still 67.1MB. Free memory was 41.3MB in the beginning and 37.7MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 514.01ms. Allocated memory is still 67.1MB. Free memory was 37.7MB in the beginning and 31.0MB in the end (delta: 6.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * TraceAbstraction took 102823.90ms. Allocated memory was 67.1MB in the beginning and 140.5MB in the end (delta: 73.4MB). Free memory was 30.7MB in the beginning and 116.4MB in the end (delta: -85.6MB). Peak memory consumption was 69.8MB. Max. memory is 16.1GB. * Witness Printer took 3.51ms. Allocated memory is still 140.5MB. Free memory was 116.4MB in the beginning and 115.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 996]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 996. Possible FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) VAL [null={1:0}] [L1000] null->prev = ((void*)0) VAL [null={1:0}] [L1001] null->colour = BLACK VAL [null={1:0}] [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null VAL [list={2:0}, null={1:0}] [L1005] list->prev = null VAL [list={2:0}, null={1:0}] [L1006] list->colour = BLACK VAL [list={2:0}, null={1:0}] [L1008] struct TSLL* end = list; VAL [end={2:0}, list={2:0}, null={1:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={2:0}, list={2:0}, null={1:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={2:0}, list={2:0}, null={1:0}] [L1042] EXPR end->colour VAL [end={2:0}, end->colour=1, list={2:0}, null={1:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE null != end VAL [end={2:0}, list={2:0}, null={1:0}] [L1045] EXPR end->colour VAL [end={2:0}, end->colour=1, list={2:0}, null={1:0}] [L1045] COND FALSE !(RED == end->colour) [L1052] EXPR end->next VAL [end={2:0}, end->next={1:0}, list={2:0}, null={1:0}] [L1052] end = end->next [L1043] COND FALSE !(null != end) VAL [end={1:0}, list={2:0}, null={1:0}] [L1056] COND TRUE null != list VAL [end={1:0}, list={2:0}, null={1:0}] [L1058] EXPR list->colour VAL [end={1:0}, list={2:0}, list->colour=1, null={1:0}] [L1058] COND FALSE !(RED == list->colour) [L1067] EXPR list->next VAL [end={1:0}, list={2:0}, list->next={1:0}, null={1:0}] [L1067] end = list->next [L1068] free(list) VAL [end={1:0}, list={2:0}, null={1:0}] [L1068] free(list) VAL [end={1:0}, list={2:0}, null={1:0}] [L1068] free(list) [L1069] list = end VAL [end={1:0}, list={1:0}, null={1:0}] [L1056] COND FALSE !(null != list) VAL [end={1:0}, list={1:0}, null={1:0}] [L1073] return 0; VAL [\result=0, end={1:0}, list={1:0}, null={1:0}] - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1004]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1004]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1005]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1005]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1060]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1060]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1067]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1067]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 178 locations, 77 error locations. Started 1 CEGAR loops. OverallTime: 102712.22ms, OverallIterations: 27, TraceHistogramMax: 2, EmptinessCheckTime: 28.13ms, AutomataDifference: 31289.57ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 11.17ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3091 SdHoareTripleChecker+Valid, 17459.59ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3091 mSDsluCounter, 493 SdHoareTripleChecker+Invalid, 14849.21ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2659 IncrementalHoareTripleChecker+Unchecked, 6472 mSDsCounter, 317 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13872 IncrementalHoareTripleChecker+Invalid, 16848 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 317 mSolverCounterUnsat, 79 mSDtfsCounter, 13872 mSolverCounterSat, 51.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1312 GetRequests, 1023 SyntacticMatches, 22 SemanticMatches, 267 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 69995.62ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=26, InterpolantAutomatonStates: 226, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 107.53ms AutomataMinimizationTime, 26 MinimizatonAttempts, 412 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 207.18ms SsaConstructionTime, 1226.46ms SatisfiabilityAnalysisTime, 62369.56ms InterpolantComputationTime, 664 NumberOfCodeBlocks, 664 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1200 ConstructedInterpolants, 83 QuantifiedInterpolants, 9505 SizeOfPredicates, 156 NumberOfNonLiveVariables, 3594 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 52 InterpolantComputations, 48 PerfectInterpolantSequences, 8/14 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-30 18:03:26,789 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...