./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0232-1.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/memsafety/test-0232-1.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 aeec7a18a8140b87b664dd42e07dd87d1c028ac9 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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/memsafety/test-0232-1.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 aeec7a18a8140b87b664dd42e07dd87d1c028ac9 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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 17:05:08,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:05:08,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:05:08,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:05:08,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:05:08,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:05:08,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:05:08,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:05:08,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:05:08,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:05:08,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:05:08,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:05:08,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:05:08,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:05:08,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:05:08,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:05:08,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:05:08,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:05:08,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:05:08,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:05:08,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:05:08,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:05:08,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:05:08,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:05:08,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:05:08,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:05:08,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:05:08,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:05:08,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:05:08,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:05:08,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:05:08,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:05:08,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:05:08,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:05:08,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:05:08,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:05:08,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:05:08,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:05:08,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:05:08,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:05:08,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:05:08,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 17:05:08,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:05:08,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:05:08,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:05:08,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:05:08,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:05:08,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:05:08,512 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:05:08,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:05:08,512 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:05:08,512 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:05:08,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:05:08,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:05:08,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:05:08,513 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:05:08,513 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:05:08,513 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:05:08,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:05:08,513 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:05:08,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:05:08,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:05:08,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:05:08,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:05:08,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:05:08,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:05:08,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:05:08,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:05:08,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 17:05:08,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 17:05:08,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:05:08,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aeec7a18a8140b87b664dd42e07dd87d1c028ac9 [2021-08-30 17:05:08,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:05:08,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:05:08,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:05:08,798 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:05:08,799 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:05:08,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0232-1.i [2021-08-30 17:05:08,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c5208bba/4003c06ba61f41fb9fadf442281ee914/FLAGffcd5b0bf [2021-08-30 17:05:09,299 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:05:09,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0232-1.i [2021-08-30 17:05:09,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c5208bba/4003c06ba61f41fb9fadf442281ee914/FLAGffcd5b0bf [2021-08-30 17:05:09,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c5208bba/4003c06ba61f41fb9fadf442281ee914 [2021-08-30 17:05:09,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:05:09,339 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:05:09,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:05:09,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:05:09,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:05:09,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b55dbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09, skipping insertion in model container [2021-08-30 17:05:09,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:05:09,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:05:09,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:05:09,603 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:05:09,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:05:09,661 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:05:09,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09 WrapperNode [2021-08-30 17:05:09,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:05:09,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:05:09,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:05:09,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:05:09,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:05:09,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:05:09,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:05:09,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:05:09,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09" (1/1) ... [2021-08-30 17:05:09,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:05:09,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:05:09,727 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 17:05:09,730 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 17:05:09,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:05:09,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:05:09,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 17:05:09,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 17:05:09,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 17:05:09,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 17:05:09,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 17:05:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 17:05:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-08-30 17:05:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:05:09,765 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 17:05:09,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 17:05:09,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 17:05:09,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 17:05:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 17:05:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:05:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 17:05:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 17:05:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 17:05:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 17:05:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 17:05:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 17:05:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 17:05:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 17:05:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 17:05:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 17:05:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 17:05:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 17:05:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 17:05:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 17:05:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 17:05:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 17:05:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 17:05:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 17:05:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 17:05:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 17:05:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 17:05:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 17:05:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 17:05:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 17:05:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 17:05:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 17:05:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 17:05:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 17:05:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 17:05:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 17:05:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 17:05:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 17:05:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 17:05:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 17:05:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 17:05:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 17:05:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 17:05:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 17:05:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 17:05:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 17:05:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 17:05:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 17:05:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 17:05:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 17:05:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 17:05:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 17:05:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 17:05:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 17:05:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 17:05:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 17:05:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 17:05:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 17:05:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 17:05:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 17:05:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 17:05:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 17:05:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 17:05:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 17:05:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 17:05:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 17:05:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 17:05:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 17:05:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 17:05:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 17:05:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 17:05:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 17:05:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 17:05:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 17:05:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 17:05:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 17:05:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 17:05:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 17:05:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 17:05:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 17:05:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 17:05:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 17:05:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 17:05:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 17:05:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 17:05:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 17:05:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 17:05:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 17:05:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 17:05:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 17:05:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 17:05:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 17:05:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 17:05:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 17:05:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 17:05:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 17:05:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 17:05:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 17:05:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 17:05:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 17:05:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 17:05:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 17:05:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 17:05:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 17:05:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 17:05:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 17:05:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 17:05:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 17:05:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 17:05:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 17:05:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 17:05:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 17:05:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 17:05:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-08-30 17:05:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 17:05:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 17:05:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 17:05:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:05:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-08-30 17:05:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:05:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:05:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 17:05:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:05:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 17:05:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 17:05:10,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:05:10,172 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 17:05:10,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:05:10 BoogieIcfgContainer [2021-08-30 17:05:10,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:05:10,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:05:10,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:05:10,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:05:10,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:05:09" (1/3) ... [2021-08-30 17:05:10,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4969ff8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:05:10, skipping insertion in model container [2021-08-30 17:05:10,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:09" (2/3) ... [2021-08-30 17:05:10,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4969ff8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:05:10, skipping insertion in model container [2021-08-30 17:05:10,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:05:10" (3/3) ... [2021-08-30 17:05:10,185 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-1.i [2021-08-30 17:05:10,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:05:10,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-08-30 17:05:10,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:05:10,245 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 17:05:10,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-08-30 17:05:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 82 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-30 17:05:10,261 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:10,261 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:10,261 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash 726856395, now seen corresponding path program 1 times [2021-08-30 17:05:10,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:10,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537646226] [2021-08-30 17:05:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:10,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:10,476 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 17:05:10,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:10,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537646226] [2021-08-30 17:05:10,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537646226] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:10,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:10,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:05:10,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921051724] [2021-08-30 17:05:10,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 17:05:10,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:10,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 17:05:10,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:05:10,506 INFO L87 Difference]: Start difference. First operand has 89 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 82 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 17:05:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:10,705 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-08-30 17:05:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 17:05:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 8 [2021-08-30 17:05:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:10,716 INFO L225 Difference]: With dead ends: 89 [2021-08-30 17:05:10,716 INFO L226 Difference]: Without dead ends: 86 [2021-08-30 17:05:10,718 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.60ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:05:10,720 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.33ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 174.19ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:10,720 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 174 Unknown, 0 Unchecked, 3.33ms Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 174.19ms Time] [2021-08-30 17:05:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-30 17:05:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-08-30 17:05:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 40 states have (on average 2.1) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-08-30 17:05:10,742 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 8 [2021-08-30 17:05:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:10,743 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-08-30 17:05:10,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 17:05:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-08-30 17:05:10,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:05:10,743 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:10,744 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:10,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 17:05:10,744 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:10,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1057814912, now seen corresponding path program 1 times [2021-08-30 17:05:10,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:10,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078398186] [2021-08-30 17:05:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:10,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:10,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:10,811 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 17:05:10,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:10,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078398186] [2021-08-30 17:05:10,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078398186] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:10,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:10,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:05:10,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381132360] [2021-08-30 17:05:10,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:05:10,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:10,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:05:10,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:05:10,814 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 17:05:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:11,001 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-08-30 17:05:11,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:05:11,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 9 [2021-08-30 17:05:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:11,003 INFO L225 Difference]: With dead ends: 78 [2021-08-30 17:05:11,003 INFO L226 Difference]: Without dead ends: 78 [2021-08-30 17:05:11,005 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.80ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:11,008 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 85 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.26ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:11,008 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 14 Invalid, 309 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [15 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 147.26ms Time] [2021-08-30 17:05:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-30 17:05:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-08-30 17:05:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.9) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-08-30 17:05:11,026 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 9 [2021-08-30 17:05:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:11,027 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-08-30 17:05:11,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 17:05:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-08-30 17:05:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:05:11,028 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:11,029 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:11,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 17:05:11,029 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1057814913, now seen corresponding path program 1 times [2021-08-30 17:05:11,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:11,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924870881] [2021-08-30 17:05:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:11,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:11,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:11,166 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 17:05:11,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:11,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924870881] [2021-08-30 17:05:11,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924870881] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:11,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:11,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:05:11,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201612371] [2021-08-30 17:05:11,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:05:11,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:05:11,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:05:11,174 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 17:05:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:11,392 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-08-30 17:05:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:05:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 9 [2021-08-30 17:05:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:11,395 INFO L225 Difference]: With dead ends: 96 [2021-08-30 17:05:11,395 INFO L226 Difference]: Without dead ends: 96 [2021-08-30 17:05:11,395 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.85ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:11,396 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 76 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.97ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:11,396 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 14 Invalid, 340 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [12 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 180.97ms Time] [2021-08-30 17:05:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-30 17:05:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2021-08-30 17:05:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 77 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-08-30 17:05:11,401 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 9 [2021-08-30 17:05:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:11,401 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-08-30 17:05:11,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 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 17:05:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-08-30 17:05:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:05:11,402 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:11,402 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:11,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 17:05:11,402 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:11,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1567476021, now seen corresponding path program 1 times [2021-08-30 17:05:11,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:11,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384665502] [2021-08-30 17:05:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:11,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:11,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:11,438 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 17:05:11,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:11,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384665502] [2021-08-30 17:05:11,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384665502] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:11,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:11,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:05:11,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714421979] [2021-08-30 17:05:11,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:05:11,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:05:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:05:11,440 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:05:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:11,547 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-08-30 17:05:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:05:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2021-08-30 17:05:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:11,548 INFO L225 Difference]: With dead ends: 79 [2021-08-30 17:05:11,548 INFO L226 Difference]: Without dead ends: 79 [2021-08-30 17:05:11,548 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 17:05:11,549 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.45ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:11,549 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 191 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [6 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 102.45ms Time] [2021-08-30 17:05:11,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-30 17:05:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-08-30 17:05:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.653061224489796) internal successors, (81), 73 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-08-30 17:05:11,553 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 10 [2021-08-30 17:05:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:11,553 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-08-30 17:05:11,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:05:11,553 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-08-30 17:05:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:05:11,554 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:11,554 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:11,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 17:05:11,554 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:11,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:11,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1567476020, now seen corresponding path program 1 times [2021-08-30 17:05:11,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:11,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758792700] [2021-08-30 17:05:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:11,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:11,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:11,589 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 17:05:11,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:11,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758792700] [2021-08-30 17:05:11,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758792700] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:11,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:11,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:05:11,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007902042] [2021-08-30 17:05:11,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:05:11,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:05:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:05:11,591 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:05:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:11,689 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-08-30 17:05:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:05:11,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2021-08-30 17:05:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:11,690 INFO L225 Difference]: With dead ends: 75 [2021-08-30 17:05:11,690 INFO L226 Difference]: Without dead ends: 75 [2021-08-30 17:05:11,690 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.19ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:05:11,691 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.88ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:11,691 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 183 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [6 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 93.88ms Time] [2021-08-30 17:05:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-30 17:05:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-30 17:05:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 69 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-08-30 17:05:11,694 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 10 [2021-08-30 17:05:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:11,694 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-08-30 17:05:11,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:05:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-08-30 17:05:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:05:11,695 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:11,695 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:11,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 17:05:11,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:11,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1388861269, now seen corresponding path program 1 times [2021-08-30 17:05:11,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:11,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557939117] [2021-08-30 17:05:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:11,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:11,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:11,823 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 17:05:11,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:11,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557939117] [2021-08-30 17:05:11,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557939117] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:11,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:11,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 17:05:11,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770634753] [2021-08-30 17:05:11,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:05:11,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:05:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:05:11,825 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 17:05:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:12,115 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-08-30 17:05:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 17:05:12,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 15 [2021-08-30 17:05:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:12,116 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:05:12,116 INFO L226 Difference]: Without dead ends: 86 [2021-08-30 17:05:12,116 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 136.87ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:05:12,117 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 163.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.03ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.02ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:12,117 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 525 Unknown, 0 Unchecked, 2.03ms Time], IncrementalHoareTripleChecker [10 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 199.02ms Time] [2021-08-30 17:05:12,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-30 17:05:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-08-30 17:05:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.490909090909091) internal successors, (82), 75 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2021-08-30 17:05:12,121 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 15 [2021-08-30 17:05:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:12,121 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2021-08-30 17:05:12,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 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 17:05:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2021-08-30 17:05:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 17:05:12,122 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:12,122 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:12,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 17:05:12,122 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:12,122 INFO L82 PathProgramCache]: Analyzing trace with hash -104748240, now seen corresponding path program 1 times [2021-08-30 17:05:12,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:12,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335638571] [2021-08-30 17:05:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:12,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:12,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:12,188 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 17:05:12,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:12,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335638571] [2021-08-30 17:05:12,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335638571] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:12,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:12,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:05:12,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681142820] [2021-08-30 17:05:12,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:05:12,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:05:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:12,190 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 17:05:12,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:12,340 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-08-30 17:05:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:05:12,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 16 [2021-08-30 17:05:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:12,342 INFO L225 Difference]: With dead ends: 81 [2021-08-30 17:05:12,342 INFO L226 Difference]: Without dead ends: 81 [2021-08-30 17:05:12,342 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.93ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:05:12,342 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 79 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.34ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:12,343 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 20 Invalid, 300 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [7 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 123.34ms Time] [2021-08-30 17:05:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-30 17:05:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-08-30 17:05:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.5) internal successors, (78), 71 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-08-30 17:05:12,346 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 16 [2021-08-30 17:05:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:12,346 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-08-30 17:05:12,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 17:05:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-08-30 17:05:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-30 17:05:12,347 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:12,347 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 17:05:12,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 17:05:12,347 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:12,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1762060380, now seen corresponding path program 1 times [2021-08-30 17:05:12,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:12,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470292444] [2021-08-30 17:05:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:12,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:12,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:12,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:12,442 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 17:05:12,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:12,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470292444] [2021-08-30 17:05:12,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470292444] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:12,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:12,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:05:12,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994512788] [2021-08-30 17:05:12,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:05:12,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:05:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:05:12,445 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:12,681 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-08-30 17:05:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:05:12,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-08-30 17:05:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:12,682 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:05:12,682 INFO L226 Difference]: Without dead ends: 86 [2021-08-30 17:05:12,682 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 89.67ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:05:12,683 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 51 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 179.72ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:12,683 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 21 Invalid, 438 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [8 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 179.72ms Time] [2021-08-30 17:05:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-30 17:05:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2021-08-30 17:05:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 70 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-08-30 17:05:12,686 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 24 [2021-08-30 17:05:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:12,687 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-08-30 17:05:12,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-08-30 17:05:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-30 17:05:12,688 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:12,688 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 17:05:12,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 17:05:12,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:12,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:12,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1762060381, now seen corresponding path program 1 times [2021-08-30 17:05:12,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:12,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100989246] [2021-08-30 17:05:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:12,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:12,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:12,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:12,814 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 17:05:12,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:12,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100989246] [2021-08-30 17:05:12,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100989246] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:12,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:12,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:05:12,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011532674] [2021-08-30 17:05:12,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:05:12,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:05:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:05:12,817 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:13,073 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-08-30 17:05:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:05:13,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-08-30 17:05:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:13,075 INFO L225 Difference]: With dead ends: 88 [2021-08-30 17:05:13,075 INFO L226 Difference]: Without dead ends: 88 [2021-08-30 17:05:13,075 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 100.02ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:05:13,075 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.77ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:13,075 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 24 Invalid, 479 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [8 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 198.77ms Time] [2021-08-30 17:05:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-30 17:05:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2021-08-30 17:05:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 69 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-08-30 17:05:13,078 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 24 [2021-08-30 17:05:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:13,078 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-08-30 17:05:13,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-08-30 17:05:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 17:05:13,078 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:13,078 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] [2021-08-30 17:05:13,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 17:05:13,079 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:13,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1143077172, now seen corresponding path program 1 times [2021-08-30 17:05:13,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:13,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144262488] [2021-08-30 17:05:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:13,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:13,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:13,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:13,177 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 17:05:13,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:13,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144262488] [2021-08-30 17:05:13,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144262488] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:13,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:13,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:05:13,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794008898] [2021-08-30 17:05:13,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:05:13,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:13,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:05:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:13,178 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:13,393 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-08-30 17:05:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:05:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-08-30 17:05:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:13,394 INFO L225 Difference]: With dead ends: 70 [2021-08-30 17:05:13,394 INFO L226 Difference]: Without dead ends: 70 [2021-08-30 17:05:13,394 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 81.61ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:05:13,395 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.57ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:13,395 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 22 Invalid, 423 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [7 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 166.57ms Time] [2021-08-30 17:05:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-30 17:05:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-30 17:05:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.434782608695652) internal successors, (66), 63 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-08-30 17:05:13,398 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 26 [2021-08-30 17:05:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:13,399 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-08-30 17:05:13,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-08-30 17:05:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 17:05:13,399 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:13,399 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] [2021-08-30 17:05:13,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 17:05:13,400 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:13,400 INFO L82 PathProgramCache]: Analyzing trace with hash 450500818, now seen corresponding path program 1 times [2021-08-30 17:05:13,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:13,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944158836] [2021-08-30 17:05:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:13,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:13,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:13,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:13,486 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 17:05:13,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:13,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944158836] [2021-08-30 17:05:13,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944158836] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:13,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:13,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:05:13,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486130051] [2021-08-30 17:05:13,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:05:13,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:05:13,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:13,488 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:13,687 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-08-30 17:05:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:05:13,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-08-30 17:05:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:13,688 INFO L225 Difference]: With dead ends: 69 [2021-08-30 17:05:13,688 INFO L226 Difference]: Without dead ends: 69 [2021-08-30 17:05:13,688 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 80.71ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:05:13,689 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 123.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.71ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:13,689 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 386 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [7 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 148.71ms Time] [2021-08-30 17:05:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-30 17:05:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-30 17:05:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 62 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-08-30 17:05:13,691 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 27 [2021-08-30 17:05:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:13,691 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-08-30 17:05:13,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-08-30 17:05:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 17:05:13,692 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:13,692 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 17:05:13,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 17:05:13,692 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr9ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1080623549, now seen corresponding path program 1 times [2021-08-30 17:05:13,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:13,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358070828] [2021-08-30 17:05:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:13,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:13,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:13,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:13,768 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 17:05:13,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:13,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358070828] [2021-08-30 17:05:13,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358070828] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:13,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:13,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:05:13,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43772508] [2021-08-30 17:05:13,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:05:13,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:05:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:13,770 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:13,982 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-08-30 17:05:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:05:13,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-08-30 17:05:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:13,983 INFO L225 Difference]: With dead ends: 68 [2021-08-30 17:05:13,983 INFO L226 Difference]: Without dead ends: 68 [2021-08-30 17:05:13,983 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 78.52ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:05:13,984 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.78ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:13,984 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 409 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [7 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 161.78ms Time] [2021-08-30 17:05:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-30 17:05:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-08-30 17:05:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.391304347826087) internal successors, (64), 61 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-08-30 17:05:13,993 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 28 [2021-08-30 17:05:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:13,993 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-08-30 17:05:13,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-08-30 17:05:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:05:13,994 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:13,994 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:13,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-30 17:05:13,994 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1016891037, now seen corresponding path program 1 times [2021-08-30 17:05:13,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:13,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069430401] [2021-08-30 17:05:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:13,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:14,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:14,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:14,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069430401] [2021-08-30 17:05:14,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069430401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:05:14,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904746282] [2021-08-30 17:05:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:14,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:05:14,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:05:14,165 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 17:05:14,197 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 17:05:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:14,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-30 17:05:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:14,391 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 17:05:14,458 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-08-30 17:05:14,458 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 21 treesize of output 29 [2021-08-30 17:05:14,574 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:05:14,574 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 33 treesize of output 24 [2021-08-30 17:05:14,651 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:05:14,652 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 41 treesize of output 21 [2021-08-30 17:05:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:14,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:14,832 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 44 treesize of output 40 [2021-08-30 17:05:17,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-30 17:05:17,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:05:17,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-30 17:05:17,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108684455] [2021-08-30 17:05:17,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:05:17,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:05:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=489, Unknown=1, NotChecked=0, Total=552 [2021-08-30 17:05:17,016 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:17,459 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-08-30 17:05:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 17:05:17,460 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-08-30 17:05:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:17,460 INFO L225 Difference]: With dead ends: 74 [2021-08-30 17:05:17,460 INFO L226 Difference]: Without dead ends: 74 [2021-08-30 17:05:17,461 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2484.42ms TimeCoverageRelationStatistics Valid=151, Invalid=904, Unknown=1, NotChecked=0, Total=1056 [2021-08-30 17:05:17,462 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 216.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 259.17ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:17,462 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 642 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [17 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 259.17ms Time] [2021-08-30 17:05:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-30 17:05:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-08-30 17:05:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.34) internal successors, (67), 65 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-08-30 17:05:17,465 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 29 [2021-08-30 17:05:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:17,465 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-08-30 17:05:17,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-08-30 17:05:17,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:05:17,466 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:17,466 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:17,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-30 17:05:17,666 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 17:05:17,667 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:17,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1016891038, now seen corresponding path program 1 times [2021-08-30 17:05:17,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:17,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035414562] [2021-08-30 17:05:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:17,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:17,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:17,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:17,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:17,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035414562] [2021-08-30 17:05:17,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035414562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:05:17,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407275277] [2021-08-30 17:05:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:17,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:05:17,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:05:17,849 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 17:05:17,850 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 17:05:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:17,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-30 17:05:17,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:18,033 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 22 treesize of output 18 [2021-08-30 17:05:18,039 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 17:05:18,164 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:05:18,164 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 15 treesize of output 15 [2021-08-30 17:05:18,172 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 18 [2021-08-30 17:05:18,253 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:05:18,254 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 55 treesize of output 46 [2021-08-30 17:05:18,262 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:05:18,263 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 51 treesize of output 46 [2021-08-30 17:05:18,365 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:05:18,365 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 66 treesize of output 46 [2021-08-30 17:05:18,368 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:05:18,369 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 40 treesize of output 24 [2021-08-30 17:05:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:18,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:18,739 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 91 treesize of output 87 [2021-08-30 17:05:18,741 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 142 treesize of output 130 [2021-08-30 17:05:18,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 52 treesize of output 48 [2021-08-30 17:05:18,869 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:05:18,870 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 48 treesize of output 47 [2021-08-30 17:05:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:18,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407275277] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:05:18,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:05:18,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2021-08-30 17:05:18,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137055175] [2021-08-30 17:05:18,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-30 17:05:18,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-30 17:05:18,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-08-30 17:05:18,962 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 27 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 5 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:05:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:19,478 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-08-30 17:05:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 17:05:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 5 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-08-30 17:05:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:19,479 INFO L225 Difference]: With dead ends: 98 [2021-08-30 17:05:19,479 INFO L226 Difference]: Without dead ends: 98 [2021-08-30 17:05:19,480 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 552.88ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 17:05:19,480 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 325.18ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:19,481 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 62 Invalid, 1082 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [10 Valid, 798 Invalid, 0 Unknown, 274 Unchecked, 325.18ms Time] [2021-08-30 17:05:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-30 17:05:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2021-08-30 17:05:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.296875) internal successors, (83), 79 states have internal predecessors, (83), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 17:05:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-08-30 17:05:19,484 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 29 [2021-08-30 17:05:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:19,484 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-08-30 17:05:19,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 5 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:05:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-08-30 17:05:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:05:19,485 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:19,485 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 17:05:19,528 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 17:05:19,692 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,SelfDestructingSolverStorable13 [2021-08-30 17:05:19,693 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:19,693 INFO L82 PathProgramCache]: Analyzing trace with hash -860408268, now seen corresponding path program 1 times [2021-08-30 17:05:19,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:19,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065518074] [2021-08-30 17:05:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:19,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:19,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:19,750 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 17:05:19,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:19,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065518074] [2021-08-30 17:05:19,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065518074] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:19,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:19,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:05:19,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61835760] [2021-08-30 17:05:19,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:05:19,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:05:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:05:19,752 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:19,903 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-08-30 17:05:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:05:19,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-08-30 17:05:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:19,904 INFO L225 Difference]: With dead ends: 87 [2021-08-30 17:05:19,904 INFO L226 Difference]: Without dead ends: 87 [2021-08-30 17:05:19,905 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.16ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:05:19,905 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.30ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:19,905 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 330 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [4 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 122.30ms Time] [2021-08-30 17:05:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-30 17:05:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-08-30 17:05:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.28125) internal successors, (82), 78 states have internal predecessors, (82), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 17:05:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-08-30 17:05:19,907 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 29 [2021-08-30 17:05:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:19,907 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-08-30 17:05:19,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-08-30 17:05:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 17:05:19,914 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:19,915 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 17:05:19,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-30 17:05:19,915 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:19,915 INFO L82 PathProgramCache]: Analyzing trace with hash -902852448, now seen corresponding path program 1 times [2021-08-30 17:05:19,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:19,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153680318] [2021-08-30 17:05:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:19,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:19,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:19,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:20,001 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 17:05:20,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:20,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153680318] [2021-08-30 17:05:20,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153680318] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:20,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:20,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:05:20,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705500892] [2021-08-30 17:05:20,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:05:20,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:05:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:05:20,004 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:20,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:20,193 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-08-30 17:05:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:05:20,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-08-30 17:05:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:20,194 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:05:20,194 INFO L226 Difference]: Without dead ends: 86 [2021-08-30 17:05:20,195 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 75.92ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:05:20,195 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.77ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:20,195 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 17 Invalid, 397 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [9 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 151.77ms Time] [2021-08-30 17:05:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-30 17:05:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-08-30 17:05:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.265625) internal successors, (81), 77 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 17:05:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-08-30 17:05:20,197 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 30 [2021-08-30 17:05:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:20,197 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-08-30 17:05:20,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-08-30 17:05:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 17:05:20,198 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:20,198 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 17:05:20,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-30 17:05:20,198 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:20,198 INFO L82 PathProgramCache]: Analyzing trace with hash -902852447, now seen corresponding path program 1 times [2021-08-30 17:05:20,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:20,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62721013] [2021-08-30 17:05:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:20,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:20,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:05:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:20,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:05:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:20,258 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 17:05:20,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:05:20,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62721013] [2021-08-30 17:05:20,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62721013] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:20,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:20,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:05:20,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973211726] [2021-08-30 17:05:20,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:05:20,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:05:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:05:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:05:20,260 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:20,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:20,373 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2021-08-30 17:05:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:05:20,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-08-30 17:05:20,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:20,374 INFO L225 Difference]: With dead ends: 81 [2021-08-30 17:05:20,374 INFO L226 Difference]: Without dead ends: 81 [2021-08-30 17:05:20,374 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.80ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:05:20,375 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.61ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:20,375 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 19 Invalid, 204 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [10 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 95.61ms Time] [2021-08-30 17:05:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-30 17:05:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-08-30 17:05:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.1875) internal successors, (76), 72 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 17:05:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2021-08-30 17:05:20,377 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 30 [2021-08-30 17:05:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:20,377 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2021-08-30 17:05:20,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2021-08-30 17:05:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 17:05:20,378 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:20,378 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 17:05:20,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-30 17:05:20,379 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:20,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:20,379 INFO L82 PathProgramCache]: Analyzing trace with hash 281339622, now seen corresponding path program 1 times [2021-08-30 17:05:20,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:20,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446330410] [2021-08-30 17:05:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:20,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:05:20,394 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 17:05:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:05:20,428 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 17:05:20,429 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 17:05:20,429 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ENSURES_VIOLATIONMEMORY_LEAK (40 of 41 remaining) [2021-08-30 17:05:20,430 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (39 of 41 remaining) [2021-08-30 17:05:20,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (38 of 41 remaining) [2021-08-30 17:05:20,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (37 of 41 remaining) [2021-08-30 17:05:20,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (36 of 41 remaining) [2021-08-30 17:05:20,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (35 of 41 remaining) [2021-08-30 17:05:20,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (34 of 41 remaining) [2021-08-30 17:05:20,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (33 of 41 remaining) [2021-08-30 17:05:20,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (32 of 41 remaining) [2021-08-30 17:05:20,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE (31 of 41 remaining) [2021-08-30 17:05:20,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE (30 of 41 remaining) [2021-08-30 17:05:20,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE (29 of 41 remaining) [2021-08-30 17:05:20,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (28 of 41 remaining) [2021-08-30 17:05:20,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (27 of 41 remaining) [2021-08-30 17:05:20,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (26 of 41 remaining) [2021-08-30 17:05:20,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (25 of 41 remaining) [2021-08-30 17:05:20,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (24 of 41 remaining) [2021-08-30 17:05:20,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (23 of 41 remaining) [2021-08-30 17:05:20,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (22 of 41 remaining) [2021-08-30 17:05:20,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (21 of 41 remaining) [2021-08-30 17:05:20,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (20 of 41 remaining) [2021-08-30 17:05:20,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (19 of 41 remaining) [2021-08-30 17:05:20,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21ASSERT_VIOLATIONMEMORY_FREE (18 of 41 remaining) [2021-08-30 17:05:20,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ASSERT_VIOLATIONMEMORY_FREE (17 of 41 remaining) [2021-08-30 17:05:20,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23ASSERT_VIOLATIONMEMORY_FREE (16 of 41 remaining) [2021-08-30 17:05:20,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION (15 of 41 remaining) [2021-08-30 17:05:20,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION (14 of 41 remaining) [2021-08-30 17:05:20,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION (13 of 41 remaining) [2021-08-30 17:05:20,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION (12 of 41 remaining) [2021-08-30 17:05:20,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION (11 of 41 remaining) [2021-08-30 17:05:20,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION (10 of 41 remaining) [2021-08-30 17:05:20,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION (9 of 41 remaining) [2021-08-30 17:05:20,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION (8 of 41 remaining) [2021-08-30 17:05:20,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION (7 of 41 remaining) [2021-08-30 17:05:20,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION (6 of 41 remaining) [2021-08-30 17:05:20,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION (5 of 41 remaining) [2021-08-30 17:05:20,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION (4 of 41 remaining) [2021-08-30 17:05:20,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION (3 of 41 remaining) [2021-08-30 17:05:20,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION (2 of 41 remaining) [2021-08-30 17:05:20,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION (1 of 41 remaining) [2021-08-30 17:05:20,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION (0 of 41 remaining) [2021-08-30 17:05:20,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-30 17:05:20,441 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:05:20,451 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 17:05:20,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:05:20 BoogieIcfgContainer [2021-08-30 17:05:20,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:05:20,462 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:05:20,462 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:05:20,462 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:05:20,463 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:05:10" (3/4) ... [2021-08-30 17:05:20,465 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-30 17:05:20,465 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:05:20,465 INFO L158 Benchmark]: Toolchain (without parser) took 11126.08ms. Allocated memory was 46.1MB in the beginning and 117.4MB in the end (delta: 71.3MB). Free memory was 20.9MB in the beginning and 90.5MB in the end (delta: -69.6MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2021-08-30 17:05:20,465 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 46.1MB. Free memory was 28.7MB in the beginning and 28.6MB in the end (delta: 31.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:05:20,466 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.75ms. Allocated memory was 46.1MB in the beginning and 58.7MB in the end (delta: 12.6MB). Free memory was 20.8MB in the beginning and 28.6MB in the end (delta: -7.8MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. [2021-08-30 17:05:20,466 INFO L158 Benchmark]: Boogie Preprocessor took 33.58ms. Allocated memory is still 58.7MB. Free memory was 28.6MB in the beginning and 25.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:05:20,466 INFO L158 Benchmark]: RCFGBuilder took 481.56ms. Allocated memory is still 58.7MB. Free memory was 25.7MB in the beginning and 24.4MB in the end (delta: 1.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-08-30 17:05:20,466 INFO L158 Benchmark]: TraceAbstraction took 10281.68ms. Allocated memory was 58.7MB in the beginning and 117.4MB in the end (delta: 58.7MB). Free memory was 23.9MB in the beginning and 90.5MB in the end (delta: -66.6MB). Peak memory consumption was 56.1MB. Max. memory is 16.1GB. [2021-08-30 17:05:20,466 INFO L158 Benchmark]: Witness Printer took 2.66ms. Allocated memory is still 117.4MB. Free memory is still 90.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:05:20,467 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 46.1MB. Free memory was 28.7MB in the beginning and 28.6MB in the end (delta: 31.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.75ms. Allocated memory was 46.1MB in the beginning and 58.7MB in the end (delta: 12.6MB). Free memory was 20.8MB in the beginning and 28.6MB in the end (delta: -7.8MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.58ms. Allocated memory is still 58.7MB. Free memory was 28.6MB in the beginning and 25.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 481.56ms. Allocated memory is still 58.7MB. Free memory was 25.7MB in the beginning and 24.4MB in the end (delta: 1.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10281.68ms. Allocated memory was 58.7MB in the beginning and 117.4MB in the end (delta: 58.7MB). Free memory was 23.9MB in the beginning and 90.5MB in the end (delta: -66.6MB). Peak memory consumption was 56.1MB. Max. memory is 16.1GB. * Witness Printer took 2.66ms. Allocated memory is still 117.4MB. Free memory is still 90.5MB. 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: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 537. Possible FailurePath: [L539] struct item *list = ((void *)0); VAL [list={3:0}] [L541] CALL append(&list) VAL [plist={3:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={1:0}, plist={3:0}, plist={3:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={1:0}, plist={3:0}, plist={3:0}] [L532] EXPR item->next VAL [item={1:0}, item->next={0:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L535] *plist = item VAL [item={1:0}, plist={3:0}, plist={3:0}] [L541] RET append(&list) VAL [list={3:0}] [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={1:0}, list={3:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={1:0}, list={3:0}] [L544] EXPR list->next VAL [\read(*list)={1:0}, list={3:0}, list->next={0:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={1:0}, list={3:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={3:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={3:0}, next={0:0}] [L545] free(list) [L546] list = next VAL [list={3:0}, next={0:0}] [L548] \read(*list) VAL [\read(*list)={0:0}, list={3:0}, next={0:0}] [L548] COND FALSE !(\read(*list)) [L553] return 0; [L539] struct item *list = ((void *)0); [L553] return 0; VAL [\result=0, next={0:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 107 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 10201.41ms, OverallIterations: 18, TraceHistogramMax: 2, EmptinessCheckTime: 14.57ms, AutomataDifference: 3881.25ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 8.28ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 665 SdHoareTripleChecker+Valid, 2830.68ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 662 mSDsluCounter, 379 SdHoareTripleChecker+Invalid, 2314.07ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 274 IncrementalHoareTripleChecker+Unchecked, 2369 mSDsCounter, 145 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6393 IncrementalHoareTripleChecker+Invalid, 6812 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 145 mSolverCounterUnsat, 83 mSDtfsCounter, 6393 mSolverCounterSat, 33.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 302 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 3975.97ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=0, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 74.56ms AutomataMinimizationTime, 17 MinimizatonAttempts, 53 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 37.39ms SsaConstructionTime, 174.39ms SatisfiabilityAnalysisTime, 2411.16ms InterpolantComputationTime, 416 NumberOfCodeBlocks, 416 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 392 ConstructedInterpolants, 14 QuantifiedInterpolants, 3885 SizeOfPredicates, 24 NumberOfNonLiveVariables, 225 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 19 InterpolantComputations, 15 PerfectInterpolantSequences, 6/28 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 17:05:20,513 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 17:05:22,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:05:22,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:05:22,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:05:22,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:05:22,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:05:22,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:05:22,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:05:22,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:05:22,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:05:22,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:05:22,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:05:22,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:05:22,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:05:22,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:05:22,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:05:22,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:05:22,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:05:22,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:05:22,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:05:22,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:05:22,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:05:22,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:05:22,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:05:22,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:05:22,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:05:22,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:05:22,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:05:22,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:05:22,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:05:22,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:05:22,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:05:22,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:05:22,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:05:22,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:05:22,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:05:22,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:05:22,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:05:22,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:05:22,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:05:22,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:05:22,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-30 17:05:22,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:05:22,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:05:22,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:05:22,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:05:22,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:05:22,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:05:22,465 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:05:22,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:05:22,466 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:05:22,466 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:05:22,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:05:22,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:05:22,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:05:22,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:05:22,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:05:22,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:05:22,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:05:22,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:05:22,468 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-30 17:05:22,468 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-30 17:05:22,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:05:22,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-30 17:05:22,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aeec7a18a8140b87b664dd42e07dd87d1c028ac9 [2021-08-30 17:05:22,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:05:22,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:05:22,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:05:22,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:05:22,754 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:05:22,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0232-1.i [2021-08-30 17:05:22,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/492d15c30/8a0a824c0fa046dbb07725c78733265a/FLAG8aaec3216 [2021-08-30 17:05:23,246 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:05:23,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0232-1.i [2021-08-30 17:05:23,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/492d15c30/8a0a824c0fa046dbb07725c78733265a/FLAG8aaec3216 [2021-08-30 17:05:23,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/492d15c30/8a0a824c0fa046dbb07725c78733265a [2021-08-30 17:05:23,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:05:23,283 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:05:23,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:05:23,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:05:23,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:05:23,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b222fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23, skipping insertion in model container [2021-08-30 17:05:23,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:05:23,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:05:23,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:05:23,522 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:05:23,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:05:23,616 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:05:23,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23 WrapperNode [2021-08-30 17:05:23,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:05:23,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:05:23,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:05:23,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:05:23,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:05:23,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:05:23,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:05:23,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:05:23,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23" (1/1) ... [2021-08-30 17:05:23,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:05:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:05:23,730 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 17:05:23,764 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 17:05:23,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:05:23,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:05:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-30 17:05:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 17:05:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 17:05:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 17:05:23,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 17:05:23,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 17:05:23,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 17:05:23,778 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-08-30 17:05:23,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:05:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 17:05:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 17:05:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 17:05:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 17:05:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 17:05:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 17:05:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 17:05:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 17:05:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 17:05:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 17:05:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 17:05:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 17:05:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 17:05:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 17:05:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 17:05:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 17:05:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 17:05:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 17:05:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 17:05:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 17:05:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 17:05:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 17:05:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 17:05:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 17:05:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 17:05:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 17:05:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 17:05:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 17:05:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 17:05:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 17:05:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 17:05:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 17:05:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 17:05:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 17:05:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 17:05:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 17:05:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 17:05:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 17:05:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 17:05:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 17:05:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 17:05:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 17:05:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 17:05:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 17:05:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-08-30 17:05:23,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 17:05:23,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 17:05:23,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 17:05:23,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:05:23,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-08-30 17:05:23,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:05:23,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:05:23,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-30 17:05:23,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:05:23,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-30 17:05:23,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-30 17:05:23,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-30 17:05:24,174 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:05:24,175 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 17:05:24,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:05:24 BoogieIcfgContainer [2021-08-30 17:05:24,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:05:24,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:05:24,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:05:24,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:05:24,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:05:23" (1/3) ... [2021-08-30 17:05:24,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e23c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:05:24, skipping insertion in model container [2021-08-30 17:05:24,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:23" (2/3) ... [2021-08-30 17:05:24,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e23c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:05:24, skipping insertion in model container [2021-08-30 17:05:24,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:05:24" (3/3) ... [2021-08-30 17:05:24,185 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-1.i [2021-08-30 17:05:24,196 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:05:24,196 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-08-30 17:05:24,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:05:24,236 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 17:05:24,236 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-08-30 17:05:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 81 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-30 17:05:24,253 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:24,253 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:24,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1666262251, now seen corresponding path program 1 times [2021-08-30 17:05:24,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:24,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927180361] [2021-08-30 17:05:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:24,267 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:24,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:24,281 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 17:05:24,282 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 17:05:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:24,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-30 17:05:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:24,536 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 17:05:24,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:24,556 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 17:05:24,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:24,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927180361] [2021-08-30 17:05:24,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927180361] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:24,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:24,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-30 17:05:24,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081785423] [2021-08-30 17:05:24,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-30 17:05:24,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-30 17:05:24,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-30 17:05:24,578 INFO L87 Difference]: Start difference. First operand has 88 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 81 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 17:05:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:24,728 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-08-30 17:05:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-30 17:05:24,730 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 8 [2021-08-30 17:05:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:24,736 INFO L225 Difference]: With dead ends: 88 [2021-08-30 17:05:24,736 INFO L226 Difference]: Without dead ends: 85 [2021-08-30 17:05:24,737 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.05ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-30 17:05:24,739 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.37ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:24,740 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 85 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 136.37ms Time] [2021-08-30 17:05:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-30 17:05:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-08-30 17:05:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 39 states have (on average 2.128205128205128) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:05:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-08-30 17:05:24,797 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 8 [2021-08-30 17:05:24,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:24,797 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-08-30 17:05:24,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 17:05:24,797 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-08-30 17:05:24,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:05:24,798 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:24,798 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:24,809 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 17:05:25,004 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 17:05:25,005 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash 114625428, now seen corresponding path program 1 times [2021-08-30 17:05:25,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:25,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401060304] [2021-08-30 17:05:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:25,006 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:25,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:25,008 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 17:05:25,012 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 17:05:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:25,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 17:05:25,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:25,166 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 17:05:25,208 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-30 17:05:25,208 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 16 treesize of output 21 [2021-08-30 17:05:25,231 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 17:05:25,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:25,269 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 17:05:25,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:25,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401060304] [2021-08-30 17:05:25,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401060304] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:25,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:25,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-08-30 17:05:25,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542595802] [2021-08-30 17:05:25,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:05:25,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:05:25,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:05:25,271 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 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 17:05:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:25,498 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-08-30 17:05:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:05:25,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 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 9 [2021-08-30 17:05:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:25,500 INFO L225 Difference]: With dead ends: 83 [2021-08-30 17:05:25,501 INFO L226 Difference]: Without dead ends: 83 [2021-08-30 17:05:25,501 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.18ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:05:25,502 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 201.55ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:25,502 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 283 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [9 Valid, 195 Invalid, 0 Unknown, 79 Unchecked, 201.55ms Time] [2021-08-30 17:05:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-30 17:05:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-08-30 17:05:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 41 states have (on average 1.975609756097561) internal successors, (81), 76 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-08-30 17:05:25,508 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 9 [2021-08-30 17:05:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:25,508 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-08-30 17:05:25,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 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 17:05:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-08-30 17:05:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:05:25,509 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:25,509 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:25,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-08-30 17:05:25,719 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 17:05:25,720 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash 114625429, now seen corresponding path program 1 times [2021-08-30 17:05:25,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:25,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630268569] [2021-08-30 17:05:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:25,721 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:25,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:25,722 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 17:05:25,755 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 17:05:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 17:05:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:25,848 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 17:05:25,852 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 17:05:25,908 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:05:25,908 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 27 treesize of output 29 [2021-08-30 17:05:25,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:05:25,916 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 26 treesize of output 22 [2021-08-30 17:05:25,933 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 17:05:25,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:26,335 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 17:05:26,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:26,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630268569] [2021-08-30 17:05:26,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630268569] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:26,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:26,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-08-30 17:05:26,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302286419] [2021-08-30 17:05:26,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:05:26,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:26,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:05:26,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:26,336 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:05:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:26,793 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-08-30 17:05:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:05:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-30 17:05:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:26,794 INFO L225 Difference]: With dead ends: 83 [2021-08-30 17:05:26,794 INFO L226 Difference]: Without dead ends: 83 [2021-08-30 17:05:26,795 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 351.06ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:05:26,797 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 368.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 426.92ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:26,797 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 478 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [2 Valid, 314 Invalid, 0 Unknown, 162 Unchecked, 426.92ms Time] [2021-08-30 17:05:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-30 17:05:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-08-30 17:05:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 41 states have (on average 1.951219512195122) internal successors, (80), 76 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-08-30 17:05:26,801 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 9 [2021-08-30 17:05:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:26,801 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-08-30 17:05:26,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:05:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-08-30 17:05:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:05:26,802 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:26,802 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:26,817 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 17:05:27,008 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 17:05:27,008 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash -741578931, now seen corresponding path program 1 times [2021-08-30 17:05:27,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:27,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234532692] [2021-08-30 17:05:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:27,009 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:27,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:27,012 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 17:05:27,016 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 17:05:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:27,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 17:05:27,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:27,109 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 17:05:27,122 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 17:05:27,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:27,165 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 17:05:27,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:27,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234532692] [2021-08-30 17:05:27,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234532692] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:27,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:27,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-30 17:05:27,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532945410] [2021-08-30 17:05:27,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:05:27,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:27,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:05:27,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:05:27,167 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 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 17:05:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:27,434 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-08-30 17:05:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 17:05:27,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 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 10 [2021-08-30 17:05:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:27,435 INFO L225 Difference]: With dead ends: 79 [2021-08-30 17:05:27,435 INFO L226 Difference]: Without dead ends: 79 [2021-08-30 17:05:27,435 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.60ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:05:27,437 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 228.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.83ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 260.95ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:27,437 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 180 Unknown, 0 Unchecked, 0.83ms Time], IncrementalHoareTripleChecker [4 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 260.95ms Time] [2021-08-30 17:05:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-30 17:05:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-08-30 17:05:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 41 states have (on average 1.853658536585366) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-08-30 17:05:27,441 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 10 [2021-08-30 17:05:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:27,441 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-08-30 17:05:27,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 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 17:05:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-08-30 17:05:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:05:27,442 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:27,442 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:27,451 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 17:05:27,649 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 17:05:27,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:27,650 INFO L82 PathProgramCache]: Analyzing trace with hash -741578932, now seen corresponding path program 1 times [2021-08-30 17:05:27,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:27,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901593118] [2021-08-30 17:05:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:27,650 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:27,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:27,652 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 17:05:27,655 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 17:05:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-30 17:05:27,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:27,740 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 17:05:27,745 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 17:05:27,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:27,761 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 17:05:27,761 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:27,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901593118] [2021-08-30 17:05:27,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901593118] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:27,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:27,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-30 17:05:27,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805612546] [2021-08-30 17:05:27,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 17:05:27,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:27,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 17:05:27,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:05:27,763 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 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 17:05:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:27,904 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-08-30 17:05:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 17:05:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 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 10 [2021-08-30 17:05:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:27,905 INFO L225 Difference]: With dead ends: 75 [2021-08-30 17:05:27,905 INFO L226 Difference]: Without dead ends: 75 [2021-08-30 17:05:27,905 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.82ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:05:27,906 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.46ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.26ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:27,906 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 9 Invalid, 125 Unknown, 0 Unchecked, 0.46ms Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 137.26ms Time] [2021-08-30 17:05:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-30 17:05:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-30 17:05:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 68 states have internal predecessors, (72), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-08-30 17:05:27,912 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 10 [2021-08-30 17:05:27,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:27,912 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-08-30 17:05:27,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 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 17:05:27,912 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-08-30 17:05:27,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:05:27,913 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:27,913 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:27,919 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 17:05:28,119 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 17:05:28,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:28,120 INFO L82 PathProgramCache]: Analyzing trace with hash -164729953, now seen corresponding path program 1 times [2021-08-30 17:05:28,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:28,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553452084] [2021-08-30 17:05:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:28,120 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:28,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:28,121 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 17:05:28,123 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 17:05:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:28,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-30 17:05:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:28,324 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:05:28,324 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 45 treesize of output 40 [2021-08-30 17:05:28,337 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:05:28,337 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 41 treesize of output 36 [2021-08-30 17:05:28,382 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 17:05:28,384 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 18 treesize of output 10 [2021-08-30 17:05:28,405 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 17:05:28,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:28,482 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 17:05:28,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:28,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553452084] [2021-08-30 17:05:28,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553452084] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:28,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:28,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-08-30 17:05:28,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631005845] [2021-08-30 17:05:28,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:05:28,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:05:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:05:28,484 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 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 17:05:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:28,959 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-08-30 17:05:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:05:28,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 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 15 [2021-08-30 17:05:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:28,960 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:05:28,960 INFO L226 Difference]: Without dead ends: 86 [2021-08-30 17:05:28,960 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 130.26ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:05:28,961 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 352.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 411.64ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:28,961 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 42 Invalid, 560 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [3 Valid, 486 Invalid, 0 Unknown, 71 Unchecked, 411.64ms Time] [2021-08-30 17:05:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-30 17:05:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2021-08-30 17:05:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-08-30 17:05:28,965 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 15 [2021-08-30 17:05:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:28,965 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-08-30 17:05:28,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 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 17:05:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-08-30 17:05:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 17:05:28,966 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:28,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:28,973 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 17:05:29,172 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 17:05:29,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash -811383088, now seen corresponding path program 1 times [2021-08-30 17:05:29,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:29,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234232991] [2021-08-30 17:05:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:29,173 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:29,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:29,175 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 17:05:29,176 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 17:05:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:29,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 17:05:29,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:29,312 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-30 17:05:29,312 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 21 treesize of output 28 [2021-08-30 17:05:29,370 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 17:05:29,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:31,455 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 17:05:31,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:31,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234232991] [2021-08-30 17:05:31,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234232991] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:31,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:31,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-08-30 17:05:31,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767301747] [2021-08-30 17:05:31,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:05:31,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:05:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2021-08-30 17:05:31,457 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 1 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 17:05:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:31,641 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-08-30 17:05:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:05:31,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 1 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 16 [2021-08-30 17:05:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:31,642 INFO L225 Difference]: With dead ends: 81 [2021-08-30 17:05:31,642 INFO L226 Difference]: Without dead ends: 81 [2021-08-30 17:05:31,643 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2038.70ms TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2021-08-30 17:05:31,643 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 180.26ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:31,643 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 188 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 69 Unchecked, 180.26ms Time] [2021-08-30 17:05:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-30 17:05:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-08-30 17:05:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 71 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-08-30 17:05:31,647 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 16 [2021-08-30 17:05:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:31,647 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-08-30 17:05:31,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 1 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 17:05:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-08-30 17:05:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 17:05:31,647 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:31,648 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:31,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-08-30 17:05:31,848 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 17:05:31,849 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash -811383087, now seen corresponding path program 1 times [2021-08-30 17:05:31,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:31,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541225079] [2021-08-30 17:05:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:31,850 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:31,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:31,851 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 17:05:31,852 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 17:05:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 17:05:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:31,985 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 17:05:32,130 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-08-30 17:05:32,130 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 3 case distinctions, treesize of input 32 treesize of output 37 [2021-08-30 17:05:32,139 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 17:05:32,139 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 31 treesize of output 31 [2021-08-30 17:05:32,227 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 17:05:32,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:34,522 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:05:34,523 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 42 treesize of output 41 [2021-08-30 17:05:34,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 22 [2021-08-30 17:05:34,686 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 17:05:34,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:34,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541225079] [2021-08-30 17:05:34,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541225079] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:34,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:34,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-08-30 17:05:34,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718916216] [2021-08-30 17:05:34,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:05:34,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:34,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:05:34,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=98, Unknown=1, NotChecked=0, Total=132 [2021-08-30 17:05:34,687 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:05:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:35,031 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-08-30 17:05:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:05:35,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 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 17:05:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:35,032 INFO L225 Difference]: With dead ends: 81 [2021-08-30 17:05:35,032 INFO L226 Difference]: Without dead ends: 81 [2021-08-30 17:05:35,032 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2309.74ms TimeCoverageRelationStatistics Valid=39, Invalid=116, Unknown=1, NotChecked=0, Total=156 [2021-08-30 17:05:35,033 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 284.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 322.96ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:35,033 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 32 Invalid, 323 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 126 Unchecked, 322.96ms Time] [2021-08-30 17:05:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-30 17:05:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-08-30 17:05:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.625) internal successors, (78), 74 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-08-30 17:05:35,036 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 16 [2021-08-30 17:05:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:35,036 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-08-30 17:05:35,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:05:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-08-30 17:05:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 17:05:35,036 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:35,036 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 17:05:35,051 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 17:05:35,247 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 17:05:35,248 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:35,248 INFO L82 PathProgramCache]: Analyzing trace with hash 742203288, now seen corresponding path program 1 times [2021-08-30 17:05:35,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:35,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380811558] [2021-08-30 17:05:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:35,249 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:35,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:35,249 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 17:05:35,250 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 17:05:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:35,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 17:05:35,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:35,392 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 17:05:35,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:35,444 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:05:35,444 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 18 treesize of output 17 [2021-08-30 17:05:35,474 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 17:05:35,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:35,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380811558] [2021-08-30 17:05:35,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380811558] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:35,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:35,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-30 17:05:35,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648565970] [2021-08-30 17:05:35,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:05:35,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:05:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:05:35,476 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:35,713 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-08-30 17:05:35,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:05:35,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-08-30 17:05:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:35,715 INFO L225 Difference]: With dead ends: 79 [2021-08-30 17:05:35,715 INFO L226 Difference]: Without dead ends: 79 [2021-08-30 17:05:35,715 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.72ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:05:35,715 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 224.80ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:35,715 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 13 Invalid, 205 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 224.80ms Time] [2021-08-30 17:05:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-30 17:05:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-08-30 17:05:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-08-30 17:05:35,718 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 20 [2021-08-30 17:05:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:35,719 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-08-30 17:05:35,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-08-30 17:05:35,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 17:05:35,719 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:35,719 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 17:05:35,742 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 17:05:35,927 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 17:05:35,927 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash 742203289, now seen corresponding path program 1 times [2021-08-30 17:05:35,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:35,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003903207] [2021-08-30 17:05:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:35,928 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:35,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:35,929 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 17:05:35,935 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 17:05:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 17:05:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:36,200 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 17:05:36,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:36,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-08-30 17:05:36,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:05:36,410 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 16 treesize of output 20 [2021-08-30 17:05:36,612 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 17:05:36,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:36,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003903207] [2021-08-30 17:05:36,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003903207] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:36,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:36,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-08-30 17:05:36,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772765616] [2021-08-30 17:05:36,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 17:05:36,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:36,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 17:05:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:05:36,613 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 10 states, 7 states have (on average 4.0) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:37,239 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-08-30 17:05:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:05:37,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 4.0) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-08-30 17:05:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:37,240 INFO L225 Difference]: With dead ends: 71 [2021-08-30 17:05:37,240 INFO L226 Difference]: Without dead ends: 71 [2021-08-30 17:05:37,241 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 190.42ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:05:37,241 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 105 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 519.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 587.68ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:37,241 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 259 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [13 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 587.68ms Time] [2021-08-30 17:05:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-30 17:05:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-30 17:05:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 64 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-08-30 17:05:37,244 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 20 [2021-08-30 17:05:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:37,244 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-08-30 17:05:37,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 4.0) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-08-30 17:05:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 17:05:37,244 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:37,245 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:37,257 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 17:05:37,445 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 17:05:37,445 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash 292950143, now seen corresponding path program 1 times [2021-08-30 17:05:37,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:37,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924805502] [2021-08-30 17:05:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:37,446 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:37,447 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 17:05:37,448 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 17:05:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-30 17:05:37,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:37,611 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 17:05:37,805 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-08-30 17:05:37,805 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 3 case distinctions, treesize of input 33 treesize of output 38 [2021-08-30 17:05:37,812 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 17:05:37,812 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 32 treesize of output 32 [2021-08-30 17:05:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:37,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:38,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 99 treesize of output 95 [2021-08-30 17:05:38,250 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:05:38,250 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 95 treesize of output 94 [2021-08-30 17:05:38,480 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:05:38,480 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 26 treesize of output 25 [2021-08-30 17:05:38,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:05:38,867 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 79 treesize of output 83 [2021-08-30 17:05:39,412 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 17:05:39,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:39,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924805502] [2021-08-30 17:05:39,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924805502] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:05:39,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:05:39,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-30 17:05:39,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721575664] [2021-08-30 17:05:39,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-30 17:05:39,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-30 17:05:39,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:05:39,413 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:40,179 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2021-08-30 17:05:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 17:05:40,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-08-30 17:05:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:40,182 INFO L225 Difference]: With dead ends: 81 [2021-08-30 17:05:40,182 INFO L226 Difference]: Without dead ends: 81 [2021-08-30 17:05:40,183 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1100.88ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-30 17:05:40,183 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 394.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 443.37ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:40,183 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 27 Invalid, 358 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 161 Unchecked, 443.37ms Time] [2021-08-30 17:05:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-30 17:05:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-08-30 17:05:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 68 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-30 17:05:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-08-30 17:05:40,187 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 22 [2021-08-30 17:05:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:40,187 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-08-30 17:05:40,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-08-30 17:05:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 17:05:40,188 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:40,188 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 17:05:40,214 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 17:05:40,388 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 17:05:40,388 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:40,389 INFO L82 PathProgramCache]: Analyzing trace with hash 486538853, now seen corresponding path program 1 times [2021-08-30 17:05:40,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:40,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607133290] [2021-08-30 17:05:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:40,389 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:40,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:40,390 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 17:05:40,391 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 17:05:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:40,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:05:40,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:40,580 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 22 treesize of output 18 [2021-08-30 17:05:40,607 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 24 treesize of output 16 [2021-08-30 17:05:40,616 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 17:05:40,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:40,684 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 50 treesize of output 46 [2021-08-30 17:05:40,742 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:05:40,742 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 51 treesize of output 48 [2021-08-30 17:05:40,775 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 17:05:40,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:40,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607133290] [2021-08-30 17:05:40,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607133290] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:40,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:40,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-08-30 17:05:40,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672866179] [2021-08-30 17:05:40,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:05:40,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:05:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:40,776 INFO L87 Difference]: Start difference. First operand 78 states and 88 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, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:41,094 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-08-30 17:05:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:05:41,095 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, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-08-30 17:05:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:41,096 INFO L225 Difference]: With dead ends: 92 [2021-08-30 17:05:41,096 INFO L226 Difference]: Without dead ends: 92 [2021-08-30 17:05:41,096 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 97.82ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:05:41,097 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 252.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 289.09ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:41,097 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 333 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [4 Valid, 270 Invalid, 0 Unknown, 59 Unchecked, 289.09ms Time] [2021-08-30 17:05:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-30 17:05:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-08-30 17:05:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 67 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-30 17:05:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-08-30 17:05:41,106 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 23 [2021-08-30 17:05:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:41,106 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-08-30 17:05:41,107 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, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-08-30 17:05:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 17:05:41,107 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:41,107 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 17:05:41,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-08-30 17:05:41,308 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 17:05:41,308 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash 486538854, now seen corresponding path program 1 times [2021-08-30 17:05:41,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:41,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952068075] [2021-08-30 17:05:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:41,309 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:41,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:41,310 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 17:05:41,319 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 17:05:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:41,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 17:05:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:41,532 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 17:05:41,535 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 17:05:41,577 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 17:05:41,579 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 17:05:41,597 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 17:05:41,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:41,834 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 60 treesize of output 56 [2021-08-30 17:05:41,838 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 90 treesize of output 82 [2021-08-30 17:05:41,976 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 36 treesize of output 28 [2021-08-30 17:05:42,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 treesize of output 24 [2021-08-30 17:05:42,187 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 17:05:42,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:42,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952068075] [2021-08-30 17:05:42,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952068075] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:42,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:42,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-08-30 17:05:42,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485862978] [2021-08-30 17:05:42,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:05:42,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:42,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:05:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:05:42,188 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-30 17:05:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:43,129 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-08-30 17:05:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:05:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-08-30 17:05:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:43,132 INFO L225 Difference]: With dead ends: 93 [2021-08-30 17:05:43,132 INFO L226 Difference]: Without dead ends: 93 [2021-08-30 17:05:43,132 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 247.59ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:05:43,138 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 789.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 883.10ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:43,138 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 33 Invalid, 463 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [8 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 883.10ms Time] [2021-08-30 17:05:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-30 17:05:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-08-30 17:05:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 66 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-30 17:05:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2021-08-30 17:05:43,153 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 23 [2021-08-30 17:05:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:43,155 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2021-08-30 17:05:43,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-30 17:05:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2021-08-30 17:05:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 17:05:43,159 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:43,160 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] [2021-08-30 17:05:43,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-08-30 17:05:43,366 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 17:05:43,367 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash -567430243, now seen corresponding path program 1 times [2021-08-30 17:05:43,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:43,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218532891] [2021-08-30 17:05:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:43,368 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:43,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:43,369 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 17:05:43,370 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 17:05:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:05:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:43,574 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 16 treesize of output 12 [2021-08-30 17:05:43,602 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 16 treesize of output 8 [2021-08-30 17:05:43,618 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 17:05:43,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:43,696 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 30 treesize of output 26 [2021-08-30 17:05:43,772 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 17:05:43,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:43,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218532891] [2021-08-30 17:05:43,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218532891] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:43,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:43,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-08-30 17:05:43,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309074748] [2021-08-30 17:05:43,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:05:43,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:43,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:05:43,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:05:43,773 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:44,082 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-08-30 17:05:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:05:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-08-30 17:05:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:44,084 INFO L225 Difference]: With dead ends: 76 [2021-08-30 17:05:44,084 INFO L226 Difference]: Without dead ends: 76 [2021-08-30 17:05:44,084 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.82ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:44,084 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 283.71ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:44,085 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 20 Invalid, 263 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 283.71ms Time] [2021-08-30 17:05:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-30 17:05:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-08-30 17:05:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 66 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-30 17:05:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-08-30 17:05:44,087 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 25 [2021-08-30 17:05:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:44,087 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-08-30 17:05:44,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-08-30 17:05:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 17:05:44,087 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:44,088 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] [2021-08-30 17:05:44,098 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 17:05:44,296 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 17:05:44,296 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1035621474, now seen corresponding path program 1 times [2021-08-30 17:05:44,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:44,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102787156] [2021-08-30 17:05:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:44,297 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:44,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:44,320 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 17:05:44,322 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 17:05:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:44,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:05:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:44,496 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 17:05:44,548 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 17:05:44,555 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 17:05:44,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:44,682 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 28 treesize of output 24 [2021-08-30 17:05:44,781 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 17:05:44,782 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:44,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102787156] [2021-08-30 17:05:44,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102787156] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:44,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:44,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-30 17:05:44,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497000619] [2021-08-30 17:05:44,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:05:44,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:44,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:05:44,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:05:44,784 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:45,092 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-08-30 17:05:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:05:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-08-30 17:05:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:45,094 INFO L225 Difference]: With dead ends: 75 [2021-08-30 17:05:45,094 INFO L226 Difference]: Without dead ends: 75 [2021-08-30 17:05:45,096 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.80ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:45,096 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.59ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 283.19ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:45,096 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 236 Unknown, 0 Unchecked, 0.59ms Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 283.19ms Time] [2021-08-30 17:05:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-30 17:05:45,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-30 17:05:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.320754716981132) internal successors, (70), 65 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-30 17:05:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-08-30 17:05:45,099 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 26 [2021-08-30 17:05:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:45,100 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-08-30 17:05:45,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-08-30 17:05:45,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 17:05:45,103 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:45,103 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] [2021-08-30 17:05:45,111 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 17:05:45,314 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 17:05:45,314 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr9ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:45,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2039494522, now seen corresponding path program 1 times [2021-08-30 17:05:45,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:45,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981918686] [2021-08-30 17:05:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:45,316 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:45,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:45,316 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 17:05:45,317 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 17:05:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 17:05:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:45,597 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 19 treesize of output 15 [2021-08-30 17:05:45,679 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 23 treesize of output 11 [2021-08-30 17:05:45,699 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 17:05:45,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:45,834 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 28 treesize of output 24 [2021-08-30 17:05:45,945 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 17:05:45,945 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:45,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981918686] [2021-08-30 17:05:45,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981918686] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:45,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:45,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-08-30 17:05:45,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166135700] [2021-08-30 17:05:45,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 17:05:45,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:45,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 17:05:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:05:45,946 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:05:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:46,509 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-08-30 17:05:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 17:05:46,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-08-30 17:05:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:46,511 INFO L225 Difference]: With dead ends: 74 [2021-08-30 17:05:46,511 INFO L226 Difference]: Without dead ends: 74 [2021-08-30 17:05:46,511 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 182.22ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:05:46,511 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 63 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 426.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 493.38ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:46,511 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 12 Invalid, 368 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [8 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 493.38ms Time] [2021-08-30 17:05:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-30 17:05:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-08-30 17:05:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 64 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-30 17:05:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-08-30 17:05:46,514 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 27 [2021-08-30 17:05:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:46,514 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-08-30 17:05:46,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:05:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-08-30 17:05:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 17:05:46,514 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:46,514 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:46,528 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 17:05:46,714 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 17:05:46,715 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:46,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1217488631, now seen corresponding path program 1 times [2021-08-30 17:05:46,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:46,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965463221] [2021-08-30 17:05:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:46,716 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:46,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:46,717 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 17:05:46,718 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 17:05:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:46,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-30 17:05:46,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:46,914 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 22 treesize of output 18 [2021-08-30 17:05:46,959 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-08-30 17:05:46,960 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 24 treesize of output 29 [2021-08-30 17:05:47,050 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:05:47,051 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 44 treesize of output 39 [2021-08-30 17:05:47,131 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 50 treesize of output 42 [2021-08-30 17:05:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:47,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:47,336 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 46 treesize of output 42 [2021-08-30 17:05:47,419 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:05:47,420 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 46 treesize of output 43 [2021-08-30 17:05:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:47,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:47,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965463221] [2021-08-30 17:05:47,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965463221] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:05:47,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:05:47,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-30 17:05:47,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488540603] [2021-08-30 17:05:47,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 17:05:47,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 17:05:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-30 17:05:47,469 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:48,108 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2021-08-30 17:05:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 17:05:48,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-08-30 17:05:48,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:48,111 INFO L225 Difference]: With dead ends: 98 [2021-08-30 17:05:48,111 INFO L226 Difference]: Without dead ends: 98 [2021-08-30 17:05:48,112 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 352.11ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:05:48,113 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 451.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 520.47ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:48,113 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 58 Invalid, 695 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [5 Valid, 492 Invalid, 0 Unknown, 198 Unchecked, 520.47ms Time] [2021-08-30 17:05:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-30 17:05:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2021-08-30 17:05:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.3125) internal successors, (84), 73 states have internal predecessors, (84), 7 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2021-08-30 17:05:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2021-08-30 17:05:48,123 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 28 [2021-08-30 17:05:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:48,123 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2021-08-30 17:05:48,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2021-08-30 17:05:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 17:05:48,125 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:48,125 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:48,134 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 17:05:48,335 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 17:05:48,336 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:48,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1217488630, now seen corresponding path program 1 times [2021-08-30 17:05:48,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:48,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642407730] [2021-08-30 17:05:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:48,337 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:48,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:48,338 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 17:05:48,339 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 17:05:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-30 17:05:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:48,478 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 17:05:48,487 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 17:05:48,579 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:05:48,579 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 28 treesize of output 30 [2021-08-30 17:05:48,587 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 17:05:48,588 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 27 treesize of output 27 [2021-08-30 17:05:48,675 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 26 treesize of output 22 [2021-08-30 17:05:48,685 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 17:05:48,812 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-08-30 17:05:48,812 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 3 case distinctions, treesize of input 29 treesize of output 34 [2021-08-30 17:05:48,950 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:05:48,950 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 60 treesize of output 55 [2021-08-30 17:05:48,967 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:05:48,967 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 56 treesize of output 47 [2021-08-30 17:05:49,197 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:05:49,198 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 71 treesize of output 51 [2021-08-30 17:05:49,203 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:05:49,203 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 45 treesize of output 29 [2021-08-30 17:05:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:49,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:50,050 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 66 treesize of output 62 [2021-08-30 17:05:50,052 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 102 treesize of output 94 [2021-08-30 17:05:50,500 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 40 treesize of output 32 [2021-08-30 17:05:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:05:58,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:58,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642407730] [2021-08-30 17:05:58,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642407730] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:05:58,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:05:58,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-30 17:05:58,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632257290] [2021-08-30 17:05:58,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-30 17:05:58,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-30 17:05:58,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=259, Unknown=3, NotChecked=0, Total=306 [2021-08-30 17:05:58,037 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-30 17:05:58,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:58,761 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-08-30 17:05:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 17:05:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-08-30 17:05:58,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:58,763 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:05:58,763 INFO L226 Difference]: Without dead ends: 86 [2021-08-30 17:05:58,763 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 8197.73ms TimeCoverageRelationStatistics Valid=84, Invalid=375, Unknown=3, NotChecked=0, Total=462 [2021-08-30 17:05:58,764 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 426.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 483.77ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:58,764 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 710 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 456 Unchecked, 483.77ms Time] [2021-08-30 17:05:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-30 17:05:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-08-30 17:05:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.296875) internal successors, (83), 73 states have internal predecessors, (83), 7 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2021-08-30 17:05:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2021-08-30 17:05:58,766 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 28 [2021-08-30 17:05:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:58,766 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2021-08-30 17:05:58,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-30 17:05:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2021-08-30 17:05:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 17:05:58,767 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:58,767 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 17:05:58,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-08-30 17:05:58,967 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 17:05:58,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:58,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1200179360, now seen corresponding path program 1 times [2021-08-30 17:05:58,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:58,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880350828] [2021-08-30 17:05:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:58,968 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:58,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:58,969 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 17:05:58,970 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 17:05:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:05:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:05:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:05:59,136 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 22 treesize of output 18 [2021-08-30 17:05:59,172 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 25 treesize of output 17 [2021-08-30 17:05:59,185 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 17:05:59,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:05:59,282 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 50 treesize of output 46 [2021-08-30 17:05:59,351 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:05:59,351 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 50 treesize of output 47 [2021-08-30 17:05:59,397 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 17:05:59,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:05:59,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880350828] [2021-08-30 17:05:59,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880350828] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:05:59,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:05:59,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-08-30 17:05:59,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851628174] [2021-08-30 17:05:59,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:05:59,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:05:59,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:05:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:05:59,399 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:05:59,736 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2021-08-30 17:05:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:05:59,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-08-30 17:05:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:05:59,737 INFO L225 Difference]: With dead ends: 85 [2021-08-30 17:05:59,737 INFO L226 Difference]: Without dead ends: 85 [2021-08-30 17:05:59,738 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 96.32ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:05:59,738 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 312.26ms IncrementalHoareTripleChecker+Time [2021-08-30 17:05:59,738 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 25 Invalid, 331 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [4 Valid, 289 Invalid, 0 Unknown, 38 Unchecked, 312.26ms Time] [2021-08-30 17:05:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-30 17:05:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-08-30 17:05:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.28125) internal successors, (82), 72 states have internal predecessors, (82), 7 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2021-08-30 17:05:59,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-08-30 17:05:59,740 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 28 [2021-08-30 17:05:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:05:59,741 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-08-30 17:05:59,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:05:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-08-30 17:05:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:05:59,741 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:59,741 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 17:05:59,763 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 17:05:59,948 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 17:05:59,948 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:05:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1449145399, now seen corresponding path program 1 times [2021-08-30 17:05:59,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:05:59,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147323154] [2021-08-30 17:05:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:59,949 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:05:59,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:05:59,950 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 17:05:59,962 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 17:06:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:00,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-30 17:06:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:06:00,082 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 17:06:00,166 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 17:06:00,193 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:06:00,193 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 17:06:00,242 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 16 treesize of output 8 [2021-08-30 17:06:00,277 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-30 17:06:00,277 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 21 treesize of output 26 [2021-08-30 17:06:00,305 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 17:06:00,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:06:00,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 35 treesize of output 31 [2021-08-30 17:06:00,486 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 50 treesize of output 46 [2021-08-30 17:06:00,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:06:00,492 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 46 treesize of output 50 [2021-08-30 17:06:00,682 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 17:06:00,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:06:00,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147323154] [2021-08-30 17:06:00,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147323154] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:00,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:00,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 11 [2021-08-30 17:06:00,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23825543] [2021-08-30 17:06:00,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:06:00,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:06:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:06:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:06:00,683 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-30 17:06:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:01,128 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-08-30 17:06:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 17:06:01,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-08-30 17:06:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:01,129 INFO L225 Difference]: With dead ends: 84 [2021-08-30 17:06:01,129 INFO L226 Difference]: Without dead ends: 84 [2021-08-30 17:06:01,129 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 228.83ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:06:01,129 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 333.30ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:01,130 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 422 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [14 Valid, 355 Invalid, 0 Unknown, 53 Unchecked, 333.30ms Time] [2021-08-30 17:06:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-30 17:06:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-08-30 17:06:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.265625) internal successors, (81), 71 states have internal predecessors, (81), 7 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2021-08-30 17:06:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2021-08-30 17:06:01,132 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 29 [2021-08-30 17:06:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:01,132 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2021-08-30 17:06:01,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-30 17:06:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2021-08-30 17:06:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-30 17:06:01,132 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:01,132 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 17:06:01,144 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 17:06:01,342 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 17:06:01,342 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-08-30 17:06:01,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:01,343 INFO L82 PathProgramCache]: Analyzing trace with hash -102022449, now seen corresponding path program 1 times [2021-08-30 17:06:01,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:06:01,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801898798] [2021-08-30 17:06:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:01,343 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:06:01,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:06:01,344 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 17:06:01,345 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 17:06:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:06:01,466 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 17:06:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:06:01,549 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-30 17:06:01,550 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 17:06:01,550 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ENSURES_VIOLATIONMEMORY_LEAK (40 of 41 remaining) [2021-08-30 17:06:01,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (39 of 41 remaining) [2021-08-30 17:06:01,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (38 of 41 remaining) [2021-08-30 17:06:01,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (37 of 41 remaining) [2021-08-30 17:06:01,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (36 of 41 remaining) [2021-08-30 17:06:01,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (35 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (34 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (33 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (32 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE (31 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE (30 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE (29 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (28 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (27 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (26 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (25 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (24 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (23 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (22 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (21 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (20 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (19 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21ASSERT_VIOLATIONMEMORY_FREE (18 of 41 remaining) [2021-08-30 17:06:01,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ASSERT_VIOLATIONMEMORY_FREE (17 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23ASSERT_VIOLATIONMEMORY_FREE (16 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION (15 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION (14 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION (13 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION (12 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION (11 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION (10 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION (9 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION (8 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION (7 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION (6 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION (5 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION (4 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION (3 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION (2 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION (1 of 41 remaining) [2021-08-30 17:06:01,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION (0 of 41 remaining) [2021-08-30 17:06:01,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-08-30 17:06:01,754 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 17:06:01,758 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:06:01,785 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 17:06:01,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:06:01 BoogieIcfgContainer [2021-08-30 17:06:01,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:06:01,850 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:06:01,850 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:06:01,853 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:06:01,855 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:05:24" (3/4) ... [2021-08-30 17:06:01,857 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-30 17:06:01,857 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:06:01,857 INFO L158 Benchmark]: Toolchain (without parser) took 38573.88ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 40.0MB in the beginning and 63.4MB in the end (delta: -23.4MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-08-30 17:06:01,876 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 46.1MB. Free memory was 28.6MB in the beginning and 28.5MB in the end (delta: 33.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:06:01,877 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.44ms. Allocated memory is still 56.6MB. Free memory was 39.7MB in the beginning and 36.0MB in the end (delta: 3.7MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2021-08-30 17:06:01,877 INFO L158 Benchmark]: Boogie Preprocessor took 62.23ms. Allocated memory is still 56.6MB. Free memory was 36.0MB in the beginning and 32.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 17:06:01,877 INFO L158 Benchmark]: RCFGBuilder took 479.83ms. Allocated memory is still 56.6MB. Free memory was 32.9MB in the beginning and 25.0MB in the end (delta: 7.9MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2021-08-30 17:06:01,877 INFO L158 Benchmark]: TraceAbstraction took 37672.44ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 24.5MB in the beginning and 63.4MB in the end (delta: -38.9MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. [2021-08-30 17:06:01,877 INFO L158 Benchmark]: Witness Printer took 6.95ms. Allocated memory is still 88.1MB. Free memory is still 63.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:06:01,878 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 46.1MB. Free memory was 28.6MB in the beginning and 28.5MB in the end (delta: 33.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.44ms. Allocated memory is still 56.6MB. Free memory was 39.7MB in the beginning and 36.0MB in the end (delta: 3.7MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.23ms. Allocated memory is still 56.6MB. Free memory was 36.0MB in the beginning and 32.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 479.83ms. Allocated memory is still 56.6MB. Free memory was 32.9MB in the beginning and 25.0MB in the end (delta: 7.9MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * TraceAbstraction took 37672.44ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 24.5MB in the beginning and 63.4MB in the end (delta: -38.9MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. * Witness Printer took 6.95ms. Allocated memory is still 88.1MB. Free memory is still 63.4MB. 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: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 537. Possible FailurePath: [L539] struct item *list = ((void *)0); VAL [list={31:0}] [L541] CALL append(&list) VAL [plist={31:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={1:0}, plist={31:0}, plist={31:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={1:0}, plist={31:0}, plist={31:0}] [L532] EXPR item->next VAL [item={1:0}, item->next={0:0}, plist={31:0}, plist={31:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={5:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={5:0}, plist={31:0}, plist={31:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={5:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={5:0}, plist={31:0}, plist={31:0}] [L535] *plist = item VAL [item={1:0}, plist={31:0}, plist={31:0}] [L541] RET append(&list) VAL [list={31:0}] [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={1:0}, list={31:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={1:0}, list={31:0}] [L544] EXPR list->next VAL [\read(*list)={1:0}, list={31:0}, list->next={0:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={1:0}, list={31:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={31:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={31:0}, next={0:0}] [L545] free(list) [L546] list = next VAL [list={31:0}, next={0:0}] [L548] \read(*list) VAL [\read(*list)={0:0}, list={31:0}, next={0:0}] [L548] COND FALSE !(\read(*list)) [L553] return 0; [L539] struct item *list = ((void *)0); [L553] return 0; VAL [\result=0, next={0:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 112 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 37526.87ms, OverallIterations: 21, TraceHistogramMax: 2, EmptinessCheckTime: 21.49ms, AutomataDifference: 8566.56ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.81ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 682 SdHoareTripleChecker+Valid, 7216.03ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 681 mSDsluCounter, 497 SdHoareTripleChecker+Invalid, 6260.15ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1472 IncrementalHoareTripleChecker+Unchecked, 3015 mSDsCounter, 95 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5298 IncrementalHoareTripleChecker+Invalid, 6865 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 95 mSolverCounterUnsat, 102 mSDtfsCounter, 5298 mSolverCounterSat, 30.34ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 804 GetRequests, 614 SyntacticMatches, 16 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 15693.68ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=0, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 112.02ms AutomataMinimizationTime, 20 MinimizatonAttempts, 57 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 176.94ms SsaConstructionTime, 636.05ms SatisfiabilityAnalysisTime, 22002.47ms InterpolantComputationTime, 425 NumberOfCodeBlocks, 425 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 744 ConstructedInterpolants, 84 QuantifiedInterpolants, 7643 SizeOfPredicates, 146 NumberOfNonLiveVariables, 2526 ConjunctsInSsa, 202 ConjunctsInUnsatCore, 40 InterpolantComputations, 34 PerfectInterpolantSequences, 11/34 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 17:06:01,913 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...