./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/list-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg --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 657efb2af25c5cc2c0afb2bbf76276caecae7904494acc21657e1ac1176685b7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg --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 657efb2af25c5cc2c0afb2bbf76276caecae7904494acc21657e1ac1176685b7 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:37:08,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:37:08,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:37:08,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:37:08,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:37:08,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:37:08,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:37:08,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:37:08,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:37:08,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:37:08,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:37:08,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:37:08,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:37:08,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:37:08,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:37:08,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:37:08,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:37:08,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:37:08,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:37:08,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:37:08,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:37:08,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:37:08,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:37:08,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:37:08,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:37:08,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:37:08,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:37:08,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:37:08,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:37:08,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:37:08,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:37:08,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:37:08,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:37:08,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:37:08,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:37:08,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:37:08,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:37:08,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:37:08,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:37:08,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:37:08,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:37:08,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:37:08,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:37:08,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:37:08,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:37:08,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:37:08,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:37:08,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:37:08,675 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:37:08,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:37:08,675 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:37:08,676 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:37:08,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:37:08,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:37:08,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:37:08,678 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:37:08,679 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:37:08,679 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:37:08,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:37:08,680 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:37:08,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:37:08,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:37:08,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:37:08,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:37:08,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:37:08,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:37:08,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:37:08,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:37:08,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:37:08,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:37:08,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:37:08,686 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 657efb2af25c5cc2c0afb2bbf76276caecae7904494acc21657e1ac1176685b7 [2021-10-28 09:37:09,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:37:09,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:37:09,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:37:09,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:37:09,060 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:37:09,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-properties/list-1.i [2021-10-28 09:37:09,168 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data/920acb8e3/741f75243d11497cb28cdd5da0154e6c/FLAG17a5a517d [2021-10-28 09:37:09,793 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:37:09,801 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/sv-benchmarks/c/list-properties/list-1.i [2021-10-28 09:37:09,821 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data/920acb8e3/741f75243d11497cb28cdd5da0154e6c/FLAG17a5a517d [2021-10-28 09:37:10,070 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data/920acb8e3/741f75243d11497cb28cdd5da0154e6c [2021-10-28 09:37:10,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:37:10,082 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:37:10,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:37:10,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:37:10,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:37:10,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a0b911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10, skipping insertion in model container [2021-10-28 09:37:10,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:37:10,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:37:10,621 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-10-28 09:37:10,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:37:10,639 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:37:10,722 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-10-28 09:37:10,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:37:10,776 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:37:10,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10 WrapperNode [2021-10-28 09:37:10,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:37:10,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:37:10,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:37:10,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:37:10,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:37:10,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:37:10,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:37:10,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:37:10,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10" (1/1) ... [2021-10-28 09:37:10,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:37:10,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:37:10,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:37:10,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:37:11,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:37:11,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:37:11,024 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:37:11,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:37:11,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:37:11,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:37:11,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:37:11,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:37:11,027 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 09:37:11,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:37:11,029 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:37:11,029 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:37:11,029 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 09:37:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 09:37:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:37:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:37:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:37:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:37:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:37:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:37:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:37:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:37:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:37:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:37:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:37:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:37:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:37:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:37:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:37:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:37:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:37:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:37:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:37:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:37:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:37:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:37:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:37:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:37:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:37:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:37:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:37:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:37:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:37:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:37:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:37:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:37:11,038 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:37:11,038 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:37:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:37:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:37:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:37:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:37:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:37:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:37:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:37:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:37:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:37:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:37:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:37:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:37:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:37:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:37:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:37:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:37:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:37:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:37:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:37:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:37:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:37:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:37:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:37:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:37:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:37:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:37:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:37:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:37:11,050 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:37:11,050 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:37:11,050 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:37:11,050 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:37:11,051 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:37:11,052 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:37:11,052 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:37:11,052 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:37:11,052 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:37:11,053 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:37:11,053 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:37:11,053 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:37:11,053 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:37:11,054 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:37:11,054 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:37:11,054 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:37:11,054 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:37:11,054 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:37:11,055 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:37:11,055 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:37:11,055 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:37:11,055 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:37:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:37:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:37:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:37:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:37:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:37:11,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:37:11,057 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:37:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:37:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:37:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:37:11,059 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:37:11,060 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:37:11,060 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:37:11,060 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:37:11,060 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:37:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:37:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:37:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:37:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:37:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:37:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:37:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:37:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:37:11,063 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:37:11,063 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:37:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 09:37:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:37:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:37:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:37:11,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:37:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:37:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:37:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:37:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:37:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:37:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:37:11,419 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 09:37:11,726 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:37:11,726 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:37:11,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:37:11 BoogieIcfgContainer [2021-10-28 09:37:11,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:37:11,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:37:11,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:37:11,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:37:11,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:37:10" (1/3) ... [2021-10-28 09:37:11,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cec777f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:37:11, skipping insertion in model container [2021-10-28 09:37:11,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:10" (2/3) ... [2021-10-28 09:37:11,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cec777f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:37:11, skipping insertion in model container [2021-10-28 09:37:11,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:37:11" (3/3) ... [2021-10-28 09:37:11,753 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-10-28 09:37:11,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:37:11,761 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-10-28 09:37:11,878 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:37:11,886 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, mAutomataTypeConcurrency=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 [2021-10-28 09:37:11,887 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-10-28 09:37:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:37:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:37:11,918 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:11,919 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:11,920 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 85898829, now seen corresponding path program 1 times [2021-10-28 09:37:11,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:11,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950144179] [2021-10-28 09:37:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:11,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:12,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:37:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:12,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:37:12,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950144179] [2021-10-28 09:37:12,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950144179] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:12,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:12,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:37:12,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109584192] [2021-10-28 09:37:12,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:37:12,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:37:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:37:12,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:37:12,288 INFO L87 Difference]: Start difference. First operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:12,594 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-10-28 09:37:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:37:12,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:37:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:12,606 INFO L225 Difference]: With dead ends: 80 [2021-10-28 09:37:12,606 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 09:37:12,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:37:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 09:37:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-10-28 09:37:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 63 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-10-28 09:37:12,671 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 11 [2021-10-28 09:37:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:12,672 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-10-28 09:37:12,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-10-28 09:37:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:37:12,674 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:12,674 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:12,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:37:12,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 85898830, now seen corresponding path program 1 times [2021-10-28 09:37:12,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:12,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326454175] [2021-10-28 09:37:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:12,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:12,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:37:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:12,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:37:12,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326454175] [2021-10-28 09:37:12,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326454175] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:12,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:12,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:37:12,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479580794] [2021-10-28 09:37:12,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:37:12,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:37:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:37:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:37:12,840 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:13,090 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-10-28 09:37:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:37:13,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:37:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:13,098 INFO L225 Difference]: With dead ends: 92 [2021-10-28 09:37:13,098 INFO L226 Difference]: Without dead ends: 92 [2021-10-28 09:37:13,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:37:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-28 09:37:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-10-28 09:37:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-10-28 09:37:13,150 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 11 [2021-10-28 09:37:13,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:13,150 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-10-28 09:37:13,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-10-28 09:37:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:37:13,152 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:13,152 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:13,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:37:13,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1250386406, now seen corresponding path program 1 times [2021-10-28 09:37:13,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:13,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377192782] [2021-10-28 09:37:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:13,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:13,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:37:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:13,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:37:13,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377192782] [2021-10-28 09:37:13,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377192782] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:13,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:13,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:37:13,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080799747] [2021-10-28 09:37:13,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:37:13,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:37:13,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:37:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:37:13,386 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:13,673 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2021-10-28 09:37:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:37:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:37:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:13,680 INFO L225 Difference]: With dead ends: 120 [2021-10-28 09:37:13,680 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 09:37:13,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:37:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 09:37:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-10-28 09:37:13,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.435483870967742) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-10-28 09:37:13,706 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 19 [2021-10-28 09:37:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:13,706 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-10-28 09:37:13,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-10-28 09:37:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:37:13,708 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:13,708 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:13,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:37:13,708 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:13,709 INFO L85 PathProgramCache]: Analyzing trace with hash 13452608, now seen corresponding path program 1 times [2021-10-28 09:37:13,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:13,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362342396] [2021-10-28 09:37:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:13,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:13,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:37:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:13,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:37:13,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362342396] [2021-10-28 09:37:13,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362342396] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:13,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:13,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:37:13,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050313695] [2021-10-28 09:37:13,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:37:13,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:37:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:37:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:37:13,830 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:14,163 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-10-28 09:37:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:37:14,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:37:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:14,165 INFO L225 Difference]: With dead ends: 109 [2021-10-28 09:37:14,165 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 09:37:14,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:37:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 09:37:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-10-28 09:37:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 83 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-10-28 09:37:14,173 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2021-10-28 09:37:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:14,174 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-10-28 09:37:14,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-10-28 09:37:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:37:14,178 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:14,178 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:14,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:37:14,178 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:14,179 INFO L85 PathProgramCache]: Analyzing trace with hash 13452609, now seen corresponding path program 1 times [2021-10-28 09:37:14,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:14,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517749451] [2021-10-28 09:37:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:14,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:14,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:37:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:14,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:37:14,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517749451] [2021-10-28 09:37:14,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517749451] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:14,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:14,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:37:14,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315694767] [2021-10-28 09:37:14,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:37:14,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:37:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:37:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:37:14,409 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:14,812 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-10-28 09:37:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:37:14,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:37:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:14,814 INFO L225 Difference]: With dead ends: 110 [2021-10-28 09:37:14,814 INFO L226 Difference]: Without dead ends: 110 [2021-10-28 09:37:14,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:37:14,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-28 09:37:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 78. [2021-10-28 09:37:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.4) internal successors, (84), 74 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-10-28 09:37:14,821 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 19 [2021-10-28 09:37:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:14,822 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-10-28 09:37:14,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-10-28 09:37:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:37:14,823 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:14,823 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:14,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:37:14,824 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash 921876220, now seen corresponding path program 1 times [2021-10-28 09:37:14,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:14,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118754627] [2021-10-28 09:37:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:14,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:14,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:37:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:14,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:37:14,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118754627] [2021-10-28 09:37:14,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118754627] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:14,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:14,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:37:14,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951890805] [2021-10-28 09:37:14,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:37:14,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:37:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:37:14,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:37:14,918 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 09:37:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:15,123 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-10-28 09:37:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:37:15,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2021-10-28 09:37:15,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:15,125 INFO L225 Difference]: With dead ends: 122 [2021-10-28 09:37:15,125 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 09:37:15,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:37:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 09:37:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2021-10-28 09:37:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.390625) internal successors, (89), 78 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-10-28 09:37:15,132 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 21 [2021-10-28 09:37:15,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:15,132 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-10-28 09:37:15,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 09:37:15,133 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-10-28 09:37:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:37:15,134 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:15,134 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:15,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:37:15,134 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:15,135 INFO L85 PathProgramCache]: Analyzing trace with hash 921928775, now seen corresponding path program 1 times [2021-10-28 09:37:15,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:15,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144176256] [2021-10-28 09:37:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:15,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:15,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:37:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:15,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:37:15,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144176256] [2021-10-28 09:37:15,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144176256] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:15,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:15,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:37:15,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093632866] [2021-10-28 09:37:15,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:37:15,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:37:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:37:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:37:15,246 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 09:37:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:15,450 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-10-28 09:37:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:37:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2021-10-28 09:37:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:15,452 INFO L225 Difference]: With dead ends: 105 [2021-10-28 09:37:15,452 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 09:37:15,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:37:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 09:37:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2021-10-28 09:37:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.375) internal successors, (88), 78 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-10-28 09:37:15,459 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 21 [2021-10-28 09:37:15,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:15,459 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-10-28 09:37:15,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 09:37:15,459 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-10-28 09:37:15,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:37:15,460 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:15,461 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:15,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:37:15,461 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:15,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:15,462 INFO L85 PathProgramCache]: Analyzing trace with hash 626114546, now seen corresponding path program 1 times [2021-10-28 09:37:15,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:15,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409462222] [2021-10-28 09:37:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:15,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:15,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:37:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:15,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:37:15,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409462222] [2021-10-28 09:37:15,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409462222] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:15,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:15,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:37:15,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045186873] [2021-10-28 09:37:15,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:37:15,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:37:15,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:37:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:37:15,597 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 09:37:15,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:15,824 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-10-28 09:37:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:37:15,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2021-10-28 09:37:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:15,826 INFO L225 Difference]: With dead ends: 88 [2021-10-28 09:37:15,826 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 09:37:15,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:37:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 09:37:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-10-28 09:37:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.34375) internal successors, (86), 76 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-10-28 09:37:15,835 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 21 [2021-10-28 09:37:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:15,836 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-10-28 09:37:15,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 09:37:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-10-28 09:37:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:37:15,837 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:15,838 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:15,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:37:15,838 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:15,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash 626114547, now seen corresponding path program 1 times [2021-10-28 09:37:15,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:15,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273144869] [2021-10-28 09:37:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:15,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:15,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:37:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:15,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:37:15,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273144869] [2021-10-28 09:37:15,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273144869] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:15,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:15,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:37:15,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099518296] [2021-10-28 09:37:15,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:37:15,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:37:15,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:37:15,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:37:16,000 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 09:37:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:16,306 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-10-28 09:37:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:37:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2021-10-28 09:37:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:16,308 INFO L225 Difference]: With dead ends: 85 [2021-10-28 09:37:16,308 INFO L226 Difference]: Without dead ends: 85 [2021-10-28 09:37:16,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:37:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-28 09:37:16,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2021-10-28 09:37:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-28 09:37:16,313 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 21 [2021-10-28 09:37:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:16,313 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-28 09:37:16,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 09:37:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-28 09:37:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:37:16,315 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:16,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:16,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:37:16,315 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr25ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1486603147, now seen corresponding path program 1 times [2021-10-28 09:37:16,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:37:16,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558102539] [2021-10-28 09:37:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:16,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:37:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:37:16,340 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:37:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:37:16,407 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:37:16,408 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:37:16,409 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr25ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:37:16,412 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:37:16,413 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:37:16,413 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:37:16,413 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:37:16,413 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:37:16,414 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:37:16,414 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:37:16,414 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:37:16,414 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 09:37:16,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 09:37:16,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 09:37:16,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 09:37:16,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 09:37:16,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 09:37:16,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 09:37:16,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 09:37:16,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 09:37:16,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 09:37:16,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 09:37:16,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 09:37:16,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 09:37:16,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 09:37:16,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 09:37:16,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 09:37:16,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:37:16,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:37:16,429 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:16,433 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:37:16,458 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 09:37:16,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:37:16 BoogieIcfgContainer [2021-10-28 09:37:16,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:37:16,490 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:37:16,490 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:37:16,491 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:37:16,491 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:37:11" (3/4) ... [2021-10-28 09:37:16,496 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:37:16,496 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:37:16,498 INFO L168 Benchmark]: Toolchain (without parser) took 6414.89 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 53.0 MB in the beginning and 67.5 MB in the end (delta: -14.5 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:16,499 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 94.4 MB. Free memory was 70.8 MB in the beginning and 70.8 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:37:16,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.97 ms. Allocated memory is still 94.4 MB. Free memory was 52.8 MB in the beginning and 64.0 MB in the end (delta: -11.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:16,507 INFO L168 Benchmark]: Boogie Preprocessor took 132.41 ms. Allocated memory is still 94.4 MB. Free memory was 64.0 MB in the beginning and 61.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:16,507 INFO L168 Benchmark]: RCFGBuilder took 815.42 ms. Allocated memory is still 94.4 MB. Free memory was 61.1 MB in the beginning and 38.9 MB in the end (delta: 22.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:16,508 INFO L168 Benchmark]: TraceAbstraction took 4758.09 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 38.3 MB in the beginning and 67.7 MB in the end (delta: -29.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:37:16,509 INFO L168 Benchmark]: Witness Printer took 6.16 ms. Allocated memory is still 113.2 MB. Free memory was 67.7 MB in the beginning and 67.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:16,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 94.4 MB. Free memory was 70.8 MB in the beginning and 70.8 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 695.97 ms. Allocated memory is still 94.4 MB. Free memory was 52.8 MB in the beginning and 64.0 MB in the end (delta: -11.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 132.41 ms. Allocated memory is still 94.4 MB. Free memory was 64.0 MB in the beginning and 61.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 815.42 ms. Allocated memory is still 94.4 MB. Free memory was 61.1 MB in the beginning and 38.9 MB in the end (delta: 22.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4758.09 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 38.3 MB in the beginning and 67.7 MB in the end (delta: -29.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 6.16 ms. Allocated memory is still 113.2 MB. Free memory was 67.7 MB in the beginning and 67.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={-1:0}, p={-1:0}] [L551] p = a VAL [a={-1:0}, p={-1:0}] [L552] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) [L558] return 0; VAL [\result=0, a={-1:0}, p={-1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: 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: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: 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: 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: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 92 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 4.5s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 395 SDtfs, 696 SDslu, 939 SDs, 0 SdLazy, 1788 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=4, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 194 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 802 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 12/12 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 [2021-10-28 09:37:16,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/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-dev-b2eff8b [2021-10-28 09:37:19,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:37:19,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:37:19,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:37:19,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:37:19,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:37:19,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:37:19,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:37:19,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:37:19,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:37:19,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:37:19,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:37:19,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:37:19,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:37:19,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:37:19,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:37:19,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:37:19,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:37:19,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:37:19,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:37:19,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:37:19,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:37:19,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:37:19,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:37:19,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:37:19,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:37:19,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:37:19,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:37:19,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:37:19,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:37:19,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:37:19,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:37:19,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:37:19,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:37:19,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:37:19,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:37:19,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:37:19,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:37:19,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:37:19,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:37:19,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:37:19,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 09:37:19,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:37:19,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:37:19,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:37:19,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:37:19,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:37:19,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:37:19,689 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:37:19,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:37:19,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:37:19,690 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:37:19,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:37:19,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:37:19,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:37:19,692 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:37:19,692 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:37:19,692 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:37:19,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:37:19,693 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:37:19,693 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 09:37:19,693 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 09:37:19,694 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:37:19,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:37:19,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:37:19,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:37:19,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:37:19,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:37:19,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:37:19,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:37:19,696 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 09:37:19,696 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 09:37:19,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:37:19,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 09:37:19,697 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 657efb2af25c5cc2c0afb2bbf76276caecae7904494acc21657e1ac1176685b7 [2021-10-28 09:37:20,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:37:20,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:37:20,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:37:20,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:37:20,191 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:37:20,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-properties/list-1.i [2021-10-28 09:37:20,275 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data/5773465d7/1216d19b0dd347f2a07fd0a3eafabbf0/FLAGb51a154ff [2021-10-28 09:37:21,030 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:37:21,032 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/sv-benchmarks/c/list-properties/list-1.i [2021-10-28 09:37:21,057 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data/5773465d7/1216d19b0dd347f2a07fd0a3eafabbf0/FLAGb51a154ff [2021-10-28 09:37:21,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/data/5773465d7/1216d19b0dd347f2a07fd0a3eafabbf0 [2021-10-28 09:37:21,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:37:21,247 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:37:21,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:37:21,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:37:21,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:37:21,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:37:21" (1/1) ... [2021-10-28 09:37:21,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22da760c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:21, skipping insertion in model container [2021-10-28 09:37:21,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:37:21" (1/1) ... [2021-10-28 09:37:21,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:37:21,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:37:21,864 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-10-28 09:37:21,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:37:21,894 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:37:21,986 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-10-28 09:37:21,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:37:22,043 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:37:22,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22 WrapperNode [2021-10-28 09:37:22,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:37:22,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:37:22,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:37:22,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:37:22,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22" (1/1) ... [2021-10-28 09:37:22,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22" (1/1) ... [2021-10-28 09:37:22,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22" (1/1) ... [2021-10-28 09:37:22,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22" (1/1) ... [2021-10-28 09:37:22,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22" (1/1) ... [2021-10-28 09:37:22,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22" (1/1) ... [2021-10-28 09:37:22,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22" (1/1) ... [2021-10-28 09:37:22,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:37:22,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:37:22,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:37:22,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:37:22,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22" (1/1) ... [2021-10-28 09:37:22,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:37:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:37:22,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:37:22,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:37:22,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:37:22,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:37:22,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 09:37:22,286 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:37:22,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:37:22,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:37:22,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:37:22,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:37:22,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:37:22,290 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 09:37:22,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:37:22,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:37:22,290 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:37:22,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 09:37:22,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 09:37:22,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:37:22,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:37:22,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:37:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:37:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:37:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:37:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:37:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:37:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:37:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:37:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:37:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:37:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:37:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:37:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:37:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:37:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:37:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:37:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:37:22,296 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:37:22,296 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:37:22,296 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:37:22,296 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:37:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:37:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:37:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:37:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:37:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:37:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:37:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:37:22,299 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:37:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:37:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:37:22,301 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:37:22,301 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:37:22,301 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:37:22,302 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:37:22,302 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:37:22,302 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:37:22,302 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:37:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:37:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:37:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:37:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:37:22,304 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:37:22,304 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:37:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:37:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:37:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:37:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:37:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:37:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:37:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:37:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:37:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:37:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:37:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:37:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:37:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:37:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:37:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:37:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:37:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:37:22,312 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:37:22,312 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:37:22,313 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:37:22,313 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:37:22,314 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:37:22,314 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:37:22,315 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:37:22,315 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:37:22,315 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:37:22,316 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:37:22,316 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:37:22,316 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:37:22,316 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:37:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:37:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:37:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:37:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:37:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:37:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:37:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:37:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:37:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:37:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:37:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:37:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:37:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:37:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:37:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:37:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:37:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:37:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:37:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:37:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:37:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:37:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:37:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:37:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:37:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:37:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:37:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:37:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:37:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:37:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:37:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:37:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:37:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:37:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 09:37:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:37:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:37:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 09:37:22,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:37:22,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:37:22,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 09:37:22,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:37:22,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 09:37:22,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:37:22,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 09:37:22,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 09:37:22,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 09:37:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:37:22,822 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 09:37:23,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:37:23,279 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:37:23,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:37:23 BoogieIcfgContainer [2021-10-28 09:37:23,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:37:23,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:37:23,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:37:23,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:37:23,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:37:21" (1/3) ... [2021-10-28 09:37:23,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cc9436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:37:23, skipping insertion in model container [2021-10-28 09:37:23,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:37:22" (2/3) ... [2021-10-28 09:37:23,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cc9436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:37:23, skipping insertion in model container [2021-10-28 09:37:23,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:37:23" (3/3) ... [2021-10-28 09:37:23,302 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-10-28 09:37:23,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:37:23,309 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-10-28 09:37:23,380 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:37:23,392 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, mAutomataTypeConcurrency=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 [2021-10-28 09:37:23,393 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-10-28 09:37:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:37:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:37:23,428 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:23,428 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:23,429 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:23,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1692035718, now seen corresponding path program 1 times [2021-10-28 09:37:23,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:23,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762547129] [2021-10-28 09:37:23,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:23,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:23,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:23,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:23,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 09:37:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:37:23,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:37:23,805 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 [2021-10-28 09:37:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:23,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:37:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:23,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:37:23,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762547129] [2021-10-28 09:37:23,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762547129] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:23,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:23,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 09:37:23,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649679552] [2021-10-28 09:37:23,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:37:23,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:37:24,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:37:24,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:37:24,014 INFO L87 Difference]: Start difference. First operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-10-28 09:37:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:24,390 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-10-28 09:37:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:37:24,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 10 [2021-10-28 09:37:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:24,403 INFO L225 Difference]: With dead ends: 76 [2021-10-28 09:37:24,403 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 09:37:24,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:37:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 09:37:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-10-28 09:37:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-10-28 09:37:24,461 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 10 [2021-10-28 09:37:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:24,462 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-10-28 09:37:24,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-10-28 09:37:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-10-28 09:37:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:37:24,464 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:24,464 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:24,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:24,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:24,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1692035717, now seen corresponding path program 1 times [2021-10-28 09:37:24,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:24,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885142796] [2021-10-28 09:37:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:24,691 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:24,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:24,693 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:24,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 09:37:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:24,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:37:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:37:24,890 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 [2021-10-28 09:37:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:24,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:37:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:25,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:37:25,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885142796] [2021-10-28 09:37:25,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885142796] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:25,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:25,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-28 09:37:25,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331932695] [2021-10-28 09:37:25,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:37:25,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:37:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:37:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:37:25,231 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-10-28 09:37:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:25,896 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-10-28 09:37:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:37:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 10 [2021-10-28 09:37:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:25,900 INFO L225 Difference]: With dead ends: 87 [2021-10-28 09:37:25,900 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 09:37:25,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:37:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 09:37:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-10-28 09:37:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.462962962962963) internal successors, (79), 71 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-10-28 09:37:25,930 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 10 [2021-10-28 09:37:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:25,931 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-10-28 09:37:25,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-10-28 09:37:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-10-28 09:37:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:37:25,937 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:25,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:25,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:26,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:26,138 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1869130219, now seen corresponding path program 1 times [2021-10-28 09:37:26,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:26,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799821569] [2021-10-28 09:37:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:26,140 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:26,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:26,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:26,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 09:37:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:26,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:37:26,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:37:26,412 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 [2021-10-28 09:37:26,465 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 [2021-10-28 09:37:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:26,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:37:26,574 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 12 [2021-10-28 09:37:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:26,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:37:26,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799821569] [2021-10-28 09:37:26,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799821569] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:26,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:26,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-28 09:37:26,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382948624] [2021-10-28 09:37:26,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:37:26,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:37:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:37:26,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:37:26,655 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2021-10-28 09:37:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:27,401 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2021-10-28 09:37:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:37:27,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 17 [2021-10-28 09:37:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:27,413 INFO L225 Difference]: With dead ends: 153 [2021-10-28 09:37:27,413 INFO L226 Difference]: Without dead ends: 153 [2021-10-28 09:37:27,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:37:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-28 09:37:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 81. [2021-10-28 09:37:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 77 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-10-28 09:37:27,439 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 17 [2021-10-28 09:37:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:27,440 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-10-28 09:37:27,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2021-10-28 09:37:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-10-28 09:37:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:37:27,443 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:27,443 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:27,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:27,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:27,656 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash 674842861, now seen corresponding path program 1 times [2021-10-28 09:37:27,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:27,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131421107] [2021-10-28 09:37:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:27,658 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:27,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:27,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:27,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 09:37:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:27,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:37:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:37:27,858 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 [2021-10-28 09:37:27,893 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 23 treesize of output 19 [2021-10-28 09:37:27,920 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 13 [2021-10-28 09:37:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:27,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:37:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:28,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:37:28,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131421107] [2021-10-28 09:37:28,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131421107] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:28,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:28,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-28 09:37:28,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223756542] [2021-10-28 09:37:28,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:37:28,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:37:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:37:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:37:28,030 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-28 09:37:28,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:28,607 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-10-28 09:37:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:37:28,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 17 [2021-10-28 09:37:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:28,610 INFO L225 Difference]: With dead ends: 105 [2021-10-28 09:37:28,610 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 09:37:28,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:37:28,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 09:37:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2021-10-28 09:37:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 79 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-10-28 09:37:28,620 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 17 [2021-10-28 09:37:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:28,620 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-10-28 09:37:28,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-28 09:37:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-10-28 09:37:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:37:28,622 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:28,622 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:28,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:28,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:28,835 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash 674842862, now seen corresponding path program 1 times [2021-10-28 09:37:28,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:28,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827468290] [2021-10-28 09:37:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:28,836 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:28,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:28,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:28,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 09:37:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:29,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:37:29,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:37:29,090 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 [2021-10-28 09:37:29,138 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 [2021-10-28 09:37:29,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:37:29,207 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 39 treesize of output 27 [2021-10-28 09:37:29,213 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 12 [2021-10-28 09:37:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:29,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:37:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:29,688 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:37:29,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827468290] [2021-10-28 09:37:29,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827468290] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:29,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:29,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-28 09:37:29,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962022615] [2021-10-28 09:37:29,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:37:29,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:37:29,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:37:29,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:37:29,690 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:31,368 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2021-10-28 09:37:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:37:31,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 09:37:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:31,371 INFO L225 Difference]: With dead ends: 107 [2021-10-28 09:37:31,371 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 09:37:31,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:37:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 09:37:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-10-28 09:37:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.403225806451613) internal successors, (87), 75 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-10-28 09:37:31,385 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 17 [2021-10-28 09:37:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:31,385 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-10-28 09:37:31,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-10-28 09:37:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:37:31,387 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:31,387 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:31,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:31,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:31,613 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:31,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1426802311, now seen corresponding path program 1 times [2021-10-28 09:37:31,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:31,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665330424] [2021-10-28 09:37:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:31,614 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:31,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:31,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:31,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 09:37:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:37:31,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:37:31,840 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 [2021-10-28 09:37:31,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:37:31,889 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 [2021-10-28 09:37:31,929 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 39 treesize of output 27 [2021-10-28 09:37:31,933 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 12 [2021-10-28 09:37:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:31,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:37:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:32,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:37:32,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665330424] [2021-10-28 09:37:32,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665330424] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:32,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:32,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-28 09:37:32,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260908703] [2021-10-28 09:37:32,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:37:32,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:37:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:37:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:37:32,381 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-10-28 09:37:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:33,496 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2021-10-28 09:37:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:37:33,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-28 09:37:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:33,498 INFO L225 Difference]: With dead ends: 99 [2021-10-28 09:37:33,498 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 09:37:33,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:37:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 09:37:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2021-10-28 09:37:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-10-28 09:37:33,508 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 18 [2021-10-28 09:37:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:33,509 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-10-28 09:37:33,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-10-28 09:37:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-10-28 09:37:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:37:33,510 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:33,510 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:33,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:33,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:33,721 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:33,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:33,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1426802312, now seen corresponding path program 1 times [2021-10-28 09:37:33,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:33,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566913975] [2021-10-28 09:37:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:33,723 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:33,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:33,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:33,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 09:37:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:33,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:37:33,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:37:33,963 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 [2021-10-28 09:37:33,990 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 23 treesize of output 19 [2021-10-28 09:37:34,015 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 13 [2021-10-28 09:37:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:34,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:37:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:34,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:37:34,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566913975] [2021-10-28 09:37:34,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566913975] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:34,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:34,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-28 09:37:34,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321392462] [2021-10-28 09:37:34,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:37:34,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:37:34,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:37:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:37:34,126 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:34,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:34,524 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-10-28 09:37:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:37:34,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-28 09:37:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:34,526 INFO L225 Difference]: With dead ends: 91 [2021-10-28 09:37:34,526 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 09:37:34,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:37:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 09:37:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-10-28 09:37:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-10-28 09:37:34,533 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 18 [2021-10-28 09:37:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:34,533 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-10-28 09:37:34,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-10-28 09:37:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:37:34,535 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:34,535 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:34,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:34,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:34,736 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash -985440585, now seen corresponding path program 1 times [2021-10-28 09:37:34,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:34,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805995115] [2021-10-28 09:37:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:34,737 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:34,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:34,738 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:34,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 09:37:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:34,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:37:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:37:34,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:37:35,031 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 [2021-10-28 09:37:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:35,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:37:35,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-28 09:37:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:35,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:37:35,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805995115] [2021-10-28 09:37:35,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805995115] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:35,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:35,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-10-28 09:37:35,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860707378] [2021-10-28 09:37:35,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:37:35,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:37:35,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:37:35,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:37:35,157 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:35,528 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-10-28 09:37:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:37:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:37:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:35,529 INFO L225 Difference]: With dead ends: 107 [2021-10-28 09:37:35,530 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 09:37:35,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:37:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 09:37:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2021-10-28 09:37:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 69 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-10-28 09:37:35,544 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 19 [2021-10-28 09:37:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:35,545 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-10-28 09:37:35,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-10-28 09:37:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:37:35,546 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:35,546 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:35,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:35,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:35,747 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:35,747 INFO L85 PathProgramCache]: Analyzing trace with hash -985388030, now seen corresponding path program 1 times [2021-10-28 09:37:35,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:35,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084032692] [2021-10-28 09:37:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:35,748 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:35,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:35,749 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:35,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-28 09:37:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:37:35,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:37:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:37:35,979 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 [2021-10-28 09:37:36,028 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 [2021-10-28 09:37:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:36,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:37:36,117 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 12 [2021-10-28 09:37:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:37:36,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:37:36,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084032692] [2021-10-28 09:37:36,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084032692] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:37:36,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:37:36,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-28 09:37:36,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822704025] [2021-10-28 09:37:36,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:37:36,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:37:36,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:37:36,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:37:36,166 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-10-28 09:37:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:37:36,817 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-10-28 09:37:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:37:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:37:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:37:36,820 INFO L225 Difference]: With dead ends: 135 [2021-10-28 09:37:36,820 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 09:37:36,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:37:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 09:37:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 87. [2021-10-28 09:37:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.25) internal successors, (95), 83 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:37:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-10-28 09:37:36,827 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2021-10-28 09:37:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:37:36,828 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-10-28 09:37:36,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-10-28 09:37:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-10-28 09:37:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:37:36,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:37:36,830 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] [2021-10-28 09:37:36,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:37,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:37,041 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr25ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-28 09:37:37,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:37:37,041 INFO L85 PathProgramCache]: Analyzing trace with hash -483881938, now seen corresponding path program 1 times [2021-10-28 09:37:37,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:37:37,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570409630] [2021-10-28 09:37:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:37:37,042 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:37:37,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:37:37,043 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:37:37,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-28 09:37:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:37:37,243 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:37:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:37:37,315 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 09:37:37,316 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:37:37,317 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr25ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:37:37,319 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:37:37,319 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:37:37,320 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:37:37,320 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:37:37,320 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:37:37,320 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:37:37,321 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:37:37,321 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:37:37,321 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 09:37:37,321 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 09:37:37,321 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 09:37:37,322 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 09:37:37,322 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 09:37:37,322 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 09:37:37,322 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 09:37:37,322 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 09:37:37,323 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 09:37:37,323 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 09:37:37,323 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 09:37:37,323 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 09:37:37,324 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 09:37:37,324 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 09:37:37,324 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 09:37:37,324 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 09:37:37,324 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:37:37,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:37:37,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:37:37,538 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:37:37,541 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:37:37,549 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 09:37:37,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:37:37 BoogieIcfgContainer [2021-10-28 09:37:37,575 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:37:37,575 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:37:37,576 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:37:37,576 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:37:37,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:37:23" (3/4) ... [2021-10-28 09:37:37,579 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:37:37,579 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:37:37,581 INFO L168 Benchmark]: Toolchain (without parser) took 16333.63 ms. Allocated memory was 62.9 MB in the beginning and 121.6 MB in the end (delta: 58.7 MB). Free memory was 43.5 MB in the beginning and 99.9 MB in the end (delta: -56.5 MB). Peak memory consumption was 2.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:37,581 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 62.9 MB. Free memory was 43.3 MB in the beginning and 43.3 MB in the end (delta: 56.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:37:37,582 INFO L168 Benchmark]: CACSL2BoogieTranslator took 797.46 ms. Allocated memory is still 62.9 MB. Free memory was 43.3 MB in the beginning and 38.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:37,582 INFO L168 Benchmark]: Boogie Preprocessor took 133.46 ms. Allocated memory is still 62.9 MB. Free memory was 38.4 MB in the beginning and 35.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:37,583 INFO L168 Benchmark]: RCFGBuilder took 1103.23 ms. Allocated memory was 62.9 MB in the beginning and 90.2 MB in the end (delta: 27.3 MB). Free memory was 35.4 MB in the beginning and 60.0 MB in the end (delta: -24.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:37,583 INFO L168 Benchmark]: TraceAbstraction took 14289.15 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 59.5 MB in the beginning and 99.9 MB in the end (delta: -40.4 MB). Peak memory consumption was 50.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:37:37,583 INFO L168 Benchmark]: Witness Printer took 4.13 ms. Allocated memory is still 121.6 MB. Free memory is still 99.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:37:37,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 62.9 MB. Free memory was 43.3 MB in the beginning and 43.3 MB in the end (delta: 56.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 797.46 ms. Allocated memory is still 62.9 MB. Free memory was 43.3 MB in the beginning and 38.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 133.46 ms. Allocated memory is still 62.9 MB. Free memory was 38.4 MB in the beginning and 35.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1103.23 ms. Allocated memory was 62.9 MB in the beginning and 90.2 MB in the end (delta: 27.3 MB). Free memory was 35.4 MB in the beginning and 60.0 MB in the end (delta: -24.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14289.15 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 59.5 MB in the beginning and 99.9 MB in the end (delta: -40.4 MB). Peak memory consumption was 50.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.13 ms. Allocated memory is still 121.6 MB. Free memory is still 99.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={1:0}] [L534] List t; [L535] List p = a; VAL [a={1:0}, p={1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={1:0}, p={1:0}] [L551] p = a VAL [a={1:0}, p={1:0}] [L552] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) [L558] return 0; VAL [\result=0, a={1:0}, p={1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: 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: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: 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: 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: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 96 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 14.1s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 383 SDtfs, 1033 SDslu, 1104 SDs, 0 SdLazy, 1407 SolverSat, 177 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 321 GetRequests, 234 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=9, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 275 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 1240 SizeOfPredicates, 47 NumberOfNonLiveVariables, 753 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 16/16 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 [2021-10-28 09:37:37,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d64081c8-b183-4b28-966d-e728ebf16379/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...