./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX --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 cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:52:07,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:52:07,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:52:07,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:52:07,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:52:07,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:52:07,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:52:07,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:52:07,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:52:07,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:52:07,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:52:07,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:52:07,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:52:07,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:52:07,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:52:07,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:52:07,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:52:07,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:52:07,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:52:07,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:52:07,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:52:07,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:52:07,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:52:07,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:52:07,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:52:07,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:52:07,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:52:07,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:52:07,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:52:07,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:52:07,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:52:07,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:52:07,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:52:07,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:52:07,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:52:07,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:52:07,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:52:07,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:52:07,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:52:07,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:52:07,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:52:07,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 09:52:07,732 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:52:07,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:52:07,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:52:07,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:52:07,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:52:07,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:52:07,734 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:52:07,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:52:07,735 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:52:07,735 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:52:07,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:52:07,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:52:07,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:52:07,736 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:52:07,736 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:52:07,737 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:52:07,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:52:07,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:52:07,737 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:52:07,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:52:07,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:52:07,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:52:07,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:52:07,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:52:07,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:52:07,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:52:07,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:52:07,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:52:07,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:52:07,740 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_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 [2021-11-09 09:52:07,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:52:08,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:52:08,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:52:08,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:52:08,012 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:52:08,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2021-11-09 09:52:08,114 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/data/b440b849b/5365288b212a43b7a5d61f76a14931a7/FLAG08f588d5d [2021-11-09 09:52:08,665 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:52:08,666 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2021-11-09 09:52:08,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/data/b440b849b/5365288b212a43b7a5d61f76a14931a7/FLAG08f588d5d [2021-11-09 09:52:08,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/data/b440b849b/5365288b212a43b7a5d61f76a14931a7 [2021-11-09 09:52:08,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:52:08,964 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:52:08,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:52:08,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:52:08,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:52:08,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:52:08" (1/1) ... [2021-11-09 09:52:08,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4033ae83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:08, skipping insertion in model container [2021-11-09 09:52:08,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:52:08" (1/1) ... [2021-11-09 09:52:08,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:52:09,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:52:09,416 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_c47363e9-c2e2-42bb-bacf-5ef10661add7/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2021-11-09 09:52:09,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:52:09,434 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:52:09,498 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_c47363e9-c2e2-42bb-bacf-5ef10661add7/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2021-11-09 09:52:09,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:52:09,545 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:52:09,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09 WrapperNode [2021-11-09 09:52:09,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:52:09,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:52:09,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:52:09,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:52:09,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09" (1/1) ... [2021-11-09 09:52:09,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09" (1/1) ... [2021-11-09 09:52:09,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09" (1/1) ... [2021-11-09 09:52:09,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09" (1/1) ... [2021-11-09 09:52:09,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09" (1/1) ... [2021-11-09 09:52:09,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09" (1/1) ... [2021-11-09 09:52:09,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09" (1/1) ... [2021-11-09 09:52:09,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:52:09,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:52:09,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:52:09,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:52:09,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09" (1/1) ... [2021-11-09 09:52:09,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:52:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:09,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:52:09,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:52:09,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 09:52:09,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:52:09,763 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 09:52:09,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 09:52:09,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 09:52:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-09 09:52:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-09 09:52:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-11-09 09:52:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2021-11-09 09:52:09,766 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_get_data_at [2021-11-09 09:52:09,766 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_update_at [2021-11-09 09:52:09,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 09:52:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 09:52:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 09:52:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 09:52:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 09:52:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 09:52:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:52:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 09:52:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 09:52:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 09:52:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 09:52:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 09:52:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 09:52:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 09:52:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 09:52:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 09:52:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 09:52:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 09:52:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 09:52:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 09:52:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 09:52:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 09:52:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 09:52:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 09:52:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 09:52:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 09:52:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 09:52:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 09:52:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 09:52:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 09:52:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 09:52:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 09:52:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 09:52:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 09:52:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 09:52:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 09:52:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 09:52:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 09:52:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 09:52:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 09:52:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 09:52:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 09:52:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 09:52:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 09:52:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 09:52:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 09:52:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 09:52:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 09:52:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 09:52:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 09:52:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 09:52:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 09:52:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 09:52:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 09:52:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 09:52:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 09:52:09,781 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 09:52:09,781 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 09:52:09,782 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 09:52:09,782 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 09:52:09,782 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 09:52:09,782 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 09:52:09,782 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 09:52:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-09 09:52:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 09:52:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 09:52:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 09:52:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 09:52:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 09:52:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 09:52:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 09:52:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 09:52:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 09:52:09,785 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 09:52:09,785 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 09:52:09,785 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 09:52:09,786 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 09:52:09,786 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 09:52:09,786 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 09:52:09,786 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 09:52:09,786 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 09:52:09,786 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 09:52:09,787 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 09:52:09,787 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 09:52:09,787 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 09:52:09,787 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 09:52:09,787 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 09:52:09,787 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 09:52:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 09:52:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 09:52:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 09:52:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 09:52:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 09:52:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 09:52:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 09:52:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 09:52:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 09:52:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 09:52:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 09:52:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 09:52:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 09:52:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 09:52:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 09:52:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 09:52:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 09:52:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 09:52:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 09:52:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 09:52:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 09:52:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 09:52:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 09:52:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-09 09:52:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-09 09:52:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:52:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 09:52:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:52:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-11-09 09:52:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2021-11-09 09:52:09,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 09:52:09,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:52:09,799 INFO L130 BoogieDeclarations]: Found specification of procedure dll_get_data_at [2021-11-09 09:52:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:52:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure dll_update_at [2021-11-09 09:52:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 09:52:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 09:52:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:52:09,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:52:10,229 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-09 09:52:10,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:52:10,459 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-09 09:52:10,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:52:10 BoogieIcfgContainer [2021-11-09 09:52:10,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:52:10,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:52:10,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:52:10,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:52:10,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:52:08" (1/3) ... [2021-11-09 09:52:10,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689f545f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:52:10, skipping insertion in model container [2021-11-09 09:52:10,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:09" (2/3) ... [2021-11-09 09:52:10,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689f545f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:52:10, skipping insertion in model container [2021-11-09 09:52:10,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:52:10" (3/3) ... [2021-11-09 09:52:10,471 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2021-11-09 09:52:10,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:52:10,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2021-11-09 09:52:10,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:52:10,534 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 [2021-11-09 09:52:10,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2021-11-09 09:52:10,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 72 states have internal predecessors, (87), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 09:52:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:52:10,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:10,558 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:10,558 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_createErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash 322336597, now seen corresponding path program 1 times [2021-11-09 09:52:10,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:10,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492816577] [2021-11-09 09:52:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:10,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:10,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:10,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:10,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492816577] [2021-11-09 09:52:10,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492816577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:10,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:10,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:10,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942246442] [2021-11-09 09:52:10,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:52:10,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:52:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:10,860 INFO L87 Difference]: Start difference. First operand has 86 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 72 states have internal predecessors, (87), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:11,228 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2021-11-09 09:52:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:11,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-09 09:52:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:11,247 INFO L225 Difference]: With dead ends: 116 [2021-11-09 09:52:11,247 INFO L226 Difference]: Without dead ends: 107 [2021-11-09 09:52:11,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-09 09:52:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2021-11-09 09:52:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 80 states have internal predecessors, (90), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-09 09:52:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2021-11-09 09:52:11,315 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 11 [2021-11-09 09:52:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:11,315 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2021-11-09 09:52:11,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2021-11-09 09:52:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:52:11,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:11,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:11,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:52:11,317 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_createErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:11,318 INFO L85 PathProgramCache]: Analyzing trace with hash 322336598, now seen corresponding path program 1 times [2021-11-09 09:52:11,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:11,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49144158] [2021-11-09 09:52:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:11,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:11,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:11,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:11,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49144158] [2021-11-09 09:52:11,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49144158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:11,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:11,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:11,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232566659] [2021-11-09 09:52:11,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:52:11,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:52:11,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:11,451 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:11,691 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2021-11-09 09:52:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:11,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-09 09:52:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:11,695 INFO L225 Difference]: With dead ends: 104 [2021-11-09 09:52:11,695 INFO L226 Difference]: Without dead ends: 104 [2021-11-09 09:52:11,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-09 09:52:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2021-11-09 09:52:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 77 states have internal predecessors, (87), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-09 09:52:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-11-09 09:52:11,726 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 11 [2021-11-09 09:52:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:11,726 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-11-09 09:52:11,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-11-09 09:52:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:52:11,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:11,728 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:11,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:52:11,729 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_createErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash 437363609, now seen corresponding path program 1 times [2021-11-09 09:52:11,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:11,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350482929] [2021-11-09 09:52:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:11,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:11,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:11,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:11,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350482929] [2021-11-09 09:52:11,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350482929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:11,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:11,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:52:11,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430102604] [2021-11-09 09:52:11,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:52:11,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:52:11,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:11,863 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:12,085 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2021-11-09 09:52:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:52:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-09 09:52:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:12,089 INFO L225 Difference]: With dead ends: 110 [2021-11-09 09:52:12,089 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 09:52:12,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:52:12,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 09:52:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2021-11-09 09:52:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.4375) internal successors, (92), 82 states have internal predecessors, (92), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-09 09:52:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2021-11-09 09:52:12,113 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 15 [2021-11-09 09:52:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:12,114 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2021-11-09 09:52:12,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2021-11-09 09:52:12,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:52:12,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:12,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:12,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:52:12,116 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:12,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash 473343920, now seen corresponding path program 1 times [2021-11-09 09:52:12,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:12,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241233145] [2021-11-09 09:52:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:12,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:12,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:12,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:12,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:12,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241233145] [2021-11-09 09:52:12,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241233145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:12,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:12,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:52:12,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336878883] [2021-11-09 09:52:12,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:52:12,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:12,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:52:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:52:12,288 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:12,687 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-11-09 09:52:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:52:12,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-09 09:52:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:12,689 INFO L225 Difference]: With dead ends: 97 [2021-11-09 09:52:12,689 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 09:52:12,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:52:12,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 09:52:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2021-11-09 09:52:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 68 states have internal predecessors, (75), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-09 09:52:12,701 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 18 [2021-11-09 09:52:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:12,701 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-09 09:52:12,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-09 09:52:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:52:12,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:12,703 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:12,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:52:12,704 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_createErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:12,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:12,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1821558229, now seen corresponding path program 1 times [2021-11-09 09:52:12,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:12,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316799893] [2021-11-09 09:52:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:12,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:12,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:12,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:12,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316799893] [2021-11-09 09:52:12,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316799893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:12,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515955483] [2021-11-09 09:52:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:12,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:12,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:12,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:12,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:52:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:52:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:13,098 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 [2021-11-09 09:52:13,219 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:52:13,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 09:52:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:13,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515955483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:13,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:13,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-09 09:52:13,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224807972] [2021-11-09 09:52:13,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:52:13,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:52:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:52:13,463 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:13,696 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-11-09 09:52:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:52:13,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-09 09:52:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:13,698 INFO L225 Difference]: With dead ends: 97 [2021-11-09 09:52:13,698 INFO L226 Difference]: Without dead ends: 97 [2021-11-09 09:52:13,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:52:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-09 09:52:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-11-09 09:52:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 67 states have internal predecessors, (74), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-11-09 09:52:13,704 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 22 [2021-11-09 09:52:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:13,705 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-11-09 09:52:13,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-11-09 09:52:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:52:13,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:13,706 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:13,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:13,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:13,932 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_createErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1821558228, now seen corresponding path program 1 times [2021-11-09 09:52:13,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:13,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787773501] [2021-11-09 09:52:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:13,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:14,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:14,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:14,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787773501] [2021-11-09 09:52:14,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787773501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:14,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520280816] [2021-11-09 09:52:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:14,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:14,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:14,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:14,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:52:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:14,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:52:14,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:14,277 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 [2021-11-09 09:52:14,284 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 [2021-11-09 09:52:14,421 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:52:14,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-09 09:52:14,430 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:52:14,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-09 09:52:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:14,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520280816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:14,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:14,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2021-11-09 09:52:14,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60120462] [2021-11-09 09:52:14,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:52:14,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:52:14,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:52:14,591 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:14,824 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-11-09 09:52:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:52:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-09 09:52:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:14,826 INFO L225 Difference]: With dead ends: 96 [2021-11-09 09:52:14,826 INFO L226 Difference]: Without dead ends: 96 [2021-11-09 09:52:14,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:52:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-09 09:52:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-11-09 09:52:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 66 states have internal predecessors, (73), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-11-09 09:52:14,830 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 22 [2021-11-09 09:52:14,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:14,830 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-11-09 09:52:14,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-11-09 09:52:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:52:14,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:14,832 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:14,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:15,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:52:15,046 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:15,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1519538210, now seen corresponding path program 1 times [2021-11-09 09:52:15,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:15,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983272094] [2021-11-09 09:52:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:15,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:15,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:15,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:15,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:15,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983272094] [2021-11-09 09:52:15,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983272094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:15,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021045847] [2021-11-09 09:52:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:15,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:15,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:15,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:15,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:52:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:15,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:52:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:15,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021045847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:15,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:15,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-11-09 09:52:15,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115361003] [2021-11-09 09:52:15,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:52:15,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:15,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:52:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:52:15,443 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:52:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:15,776 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-11-09 09:52:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:52:15,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-09 09:52:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:15,778 INFO L225 Difference]: With dead ends: 103 [2021-11-09 09:52:15,778 INFO L226 Difference]: Without dead ends: 100 [2021-11-09 09:52:15,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:52:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-09 09:52:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-11-09 09:52:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 68 states have internal predecessors, (75), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-09 09:52:15,782 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 25 [2021-11-09 09:52:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:15,782 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-09 09:52:15,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:52:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-09 09:52:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:52:15,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:15,785 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:15,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:15,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 09:52:15,996 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1412675568, now seen corresponding path program 2 times [2021-11-09 09:52:15,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:15,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372297688] [2021-11-09 09:52:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:15,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:16,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:16,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:16,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:16,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372297688] [2021-11-09 09:52:16,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372297688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:16,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201939720] [2021-11-09 09:52:16,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:52:16,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:16,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:16,096 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:16,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:52:16,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 09:52:16,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:16,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:52:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:52:16,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201939720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:16,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:16,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-09 09:52:16,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124728013] [2021-11-09 09:52:16,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:52:16,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:16,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:52:16,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:52:16,353 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:16,407 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2021-11-09 09:52:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:52:16,407 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-11-09 09:52:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:16,411 INFO L225 Difference]: With dead ends: 77 [2021-11-09 09:52:16,411 INFO L226 Difference]: Without dead ends: 77 [2021-11-09 09:52:16,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:52:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-09 09:52:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-11-09 09:52:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 61 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-11-09 09:52:16,415 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 32 [2021-11-09 09:52:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:16,416 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-11-09 09:52:16,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-11-09 09:52:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:52:16,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:16,423 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:16,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:16,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:16,645 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_update_atErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:16,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:16,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1412675623, now seen corresponding path program 1 times [2021-11-09 09:52:16,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:16,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393421134] [2021-11-09 09:52:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:16,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:16,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:16,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:16,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:16,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393421134] [2021-11-09 09:52:16,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393421134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:16,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165169627] [2021-11-09 09:52:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:16,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:16,736 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:16,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:52:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:16,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:52:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:17,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165169627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:17,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:17,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-11-09 09:52:17,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805731645] [2021-11-09 09:52:17,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:52:17,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:52:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:52:17,039 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:52:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:17,223 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2021-11-09 09:52:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:52:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-11-09 09:52:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:17,224 INFO L225 Difference]: With dead ends: 85 [2021-11-09 09:52:17,224 INFO L226 Difference]: Without dead ends: 85 [2021-11-09 09:52:17,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:52:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-09 09:52:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-11-09 09:52:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 61 states have internal predecessors, (69), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-11-09 09:52:17,228 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 32 [2021-11-09 09:52:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:17,228 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-11-09 09:52:17,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:52:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-11-09 09:52:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:52:17,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:17,229 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:17,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:17,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:17,440 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_update_atErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1807265449, now seen corresponding path program 1 times [2021-11-09 09:52:17,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:17,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925619093] [2021-11-09 09:52:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:17,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:17,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:17,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:52:17,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:17,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925619093] [2021-11-09 09:52:17,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925619093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:17,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:17,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 09:52:17,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918559209] [2021-11-09 09:52:17,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:52:17,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:52:17,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:52:17,588 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:52:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:18,050 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-11-09 09:52:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:52:18,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-11-09 09:52:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:18,051 INFO L225 Difference]: With dead ends: 94 [2021-11-09 09:52:18,051 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 09:52:18,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:52:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 09:52:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2021-11-09 09:52:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.4) internal successors, (77), 65 states have internal predecessors, (77), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-11-09 09:52:18,054 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 33 [2021-11-09 09:52:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:18,055 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-11-09 09:52:18,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:52:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-11-09 09:52:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:52:18,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:18,056 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:18,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:52:18,056 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_update_atErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1807265450, now seen corresponding path program 1 times [2021-11-09 09:52:18,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:18,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748155868] [2021-11-09 09:52:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:18,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:18,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:18,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:52:18,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:18,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748155868] [2021-11-09 09:52:18,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748155868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:18,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:18,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 09:52:18,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930085557] [2021-11-09 09:52:18,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:52:18,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:18,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:52:18,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:52:18,251 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:52:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:18,805 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-11-09 09:52:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:52:18,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-11-09 09:52:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:18,806 INFO L225 Difference]: With dead ends: 93 [2021-11-09 09:52:18,806 INFO L226 Difference]: Without dead ends: 93 [2021-11-09 09:52:18,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:52:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-09 09:52:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-11-09 09:52:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 65 states have internal predecessors, (74), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-11-09 09:52:18,810 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 33 [2021-11-09 09:52:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:18,810 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-11-09 09:52:18,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:52:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-11-09 09:52:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:52:18,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:18,815 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:18,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:52:18,816 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:18,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1464970113, now seen corresponding path program 1 times [2021-11-09 09:52:18,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:18,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876686842] [2021-11-09 09:52:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:18,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:18,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:19,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:19,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:19,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876686842] [2021-11-09 09:52:19,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876686842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:19,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58596687] [2021-11-09 09:52:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:19,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:19,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:19,204 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:19,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:52:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:19,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:52:19,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:19,407 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 [2021-11-09 09:52:19,436 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:52:19,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:52:19,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 09:52:19,512 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:52:19,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:52:19,587 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-09 09:52:19,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 43 [2021-11-09 09:52:19,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-09 09:52:19,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:19,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-09 09:52:19,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894007710] [2021-11-09 09:52:19,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:52:19,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:52:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:52:19,649 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:52:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:20,625 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-09 09:52:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:52:20,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2021-11-09 09:52:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:20,627 INFO L225 Difference]: With dead ends: 106 [2021-11-09 09:52:20,627 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 09:52:20,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:52:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 09:52:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 80. [2021-11-09 09:52:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 69 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2021-11-09 09:52:20,632 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 36 [2021-11-09 09:52:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:20,633 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2021-11-09 09:52:20,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:52:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2021-11-09 09:52:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:52:20,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:20,634 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:20,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:20,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:20,852 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_update_atErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1464970112, now seen corresponding path program 1 times [2021-11-09 09:52:20,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:20,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857350876] [2021-11-09 09:52:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:20,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:21,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:21,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:21,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:21,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857350876] [2021-11-09 09:52:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857350876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:21,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340576034] [2021-11-09 09:52:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:21,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:21,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:21,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:21,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:52:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:21,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 09:52:21,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:21,563 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 [2021-11-09 09:52:21,661 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:52:21,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:52:21,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 09:52:21,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 09:52:21,782 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:52:21,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:52:21,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:21,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:52:21,916 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-09 09:52:21,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 94 [2021-11-09 09:52:21,940 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-09 09:52:21,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 90 [2021-11-09 09:52:22,697 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-09 09:52:22,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 72 [2021-11-09 09:52:22,711 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-09 09:52:22,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 29 [2021-11-09 09:52:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:22,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340576034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:22,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:22,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-11-09 09:52:22,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988473395] [2021-11-09 09:52:22,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:52:22,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:52:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:52:22,816 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 26 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:52:26,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:26,100 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2021-11-09 09:52:26,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:52:26,101 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 26 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-09 09:52:26,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:26,103 INFO L225 Difference]: With dead ends: 135 [2021-11-09 09:52:26,103 INFO L226 Difference]: Without dead ends: 135 [2021-11-09 09:52:26,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=302, Invalid=2350, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:52:26,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-09 09:52:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 95. [2021-11-09 09:52:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.352112676056338) internal successors, (96), 82 states have internal predecessors, (96), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-09 09:52:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2021-11-09 09:52:26,110 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 36 [2021-11-09 09:52:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:26,110 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2021-11-09 09:52:26,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 26 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:52:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2021-11-09 09:52:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:52:26,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:26,112 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:26,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:26,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:26,332 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1760241838, now seen corresponding path program 2 times [2021-11-09 09:52:26,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:26,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694326782] [2021-11-09 09:52:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:26,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:26,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:26,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:52:26,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:26,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694326782] [2021-11-09 09:52:26,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694326782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:26,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:26,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 09:52:26,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341045164] [2021-11-09 09:52:26,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:52:26,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:52:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:52:26,478 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:26,801 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-11-09 09:52:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:52:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-11-09 09:52:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:26,802 INFO L225 Difference]: With dead ends: 84 [2021-11-09 09:52:26,803 INFO L226 Difference]: Without dead ends: 84 [2021-11-09 09:52:26,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:52:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-09 09:52:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-11-09 09:52:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 60 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-11-09 09:52:26,807 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 39 [2021-11-09 09:52:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:26,807 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-11-09 09:52:26,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-11-09 09:52:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:52:26,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:26,809 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:26,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:52:26,809 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_destroyErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1121405506, now seen corresponding path program 1 times [2021-11-09 09:52:26,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:26,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449928375] [2021-11-09 09:52:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:26,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:26,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:26,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:26,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:52:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:52:26,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:26,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449928375] [2021-11-09 09:52:26,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449928375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:26,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:26,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-09 09:52:26,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253351906] [2021-11-09 09:52:26,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:52:26,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:26,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:52:26,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:52:26,976 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:52:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:27,367 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-11-09 09:52:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:52:27,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2021-11-09 09:52:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:27,368 INFO L225 Difference]: With dead ends: 84 [2021-11-09 09:52:27,368 INFO L226 Difference]: Without dead ends: 84 [2021-11-09 09:52:27,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:52:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-09 09:52:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2021-11-09 09:52:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.2) internal successors, (66), 61 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-11-09 09:52:27,375 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 46 [2021-11-09 09:52:27,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:27,376 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-11-09 09:52:27,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:52:27,376 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-11-09 09:52:27,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:52:27,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:27,377 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:27,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:52:27,378 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_destroyErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:27,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:27,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1121405507, now seen corresponding path program 1 times [2021-11-09 09:52:27,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:27,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731734577] [2021-11-09 09:52:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:27,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:27,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:27,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:27,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:52:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:52:27,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:27,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731734577] [2021-11-09 09:52:27,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731734577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:27,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271864377] [2021-11-09 09:52:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:27,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:27,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:27,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:27,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:52:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:27,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:52:27,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:52:27,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271864377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:27,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:27,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-11-09 09:52:27,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470404564] [2021-11-09 09:52:27,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:52:27,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:27,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:52:27,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:52:27,957 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:28,194 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-11-09 09:52:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:52:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2021-11-09 09:52:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:28,196 INFO L225 Difference]: With dead ends: 83 [2021-11-09 09:52:28,196 INFO L226 Difference]: Without dead ends: 83 [2021-11-09 09:52:28,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-09 09:52:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-11-09 09:52:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 62 states have internal predecessors, (68), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2021-11-09 09:52:28,200 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 46 [2021-11-09 09:52:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:28,200 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2021-11-09 09:52:28,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2021-11-09 09:52:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:52:28,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:28,202 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:28,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:28,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:52:28,418 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:28,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2089902494, now seen corresponding path program 1 times [2021-11-09 09:52:28,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:28,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793778131] [2021-11-09 09:52:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:28,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:28,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:28,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:28,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:52:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:52:28,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:28,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793778131] [2021-11-09 09:52:28,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793778131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:28,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152276752] [2021-11-09 09:52:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:28,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:28,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:28,584 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:28,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:52:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:28,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:52:28,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:52:28,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152276752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:28,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:28,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 13 [2021-11-09 09:52:28,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404475936] [2021-11-09 09:52:28,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:52:28,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:52:28,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:28,966 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:52:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:29,021 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-11-09 09:52:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:52:29,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-11-09 09:52:29,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:29,023 INFO L225 Difference]: With dead ends: 69 [2021-11-09 09:52:29,023 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 09:52:29,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:52:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 09:52:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-09 09:52:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.169811320754717) internal successors, (62), 57 states have internal predecessors, (62), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-11-09 09:52:29,027 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 47 [2021-11-09 09:52:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:29,027 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-11-09 09:52:29,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:52:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-11-09 09:52:29,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 09:52:29,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:29,029 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:29,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:29,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:52:29,243 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_destroyErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:29,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1293626761, now seen corresponding path program 2 times [2021-11-09 09:52:29,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:29,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230643869] [2021-11-09 09:52:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:29,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:29,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:29,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:29,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:52:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:29,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 09:52:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 09:52:29,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:29,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230643869] [2021-11-09 09:52:29,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230643869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:29,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:29,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-09 09:52:29,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20018174] [2021-11-09 09:52:29,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:52:29,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:52:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:52:29,445 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:52:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:29,833 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-11-09 09:52:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:52:29,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2021-11-09 09:52:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:29,835 INFO L225 Difference]: With dead ends: 76 [2021-11-09 09:52:29,835 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 09:52:29,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:52:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 09:52:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-11-09 09:52:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 59 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-11-09 09:52:29,841 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 54 [2021-11-09 09:52:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:29,843 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-11-09 09:52:29,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:52:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-11-09 09:52:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:52:29,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:29,844 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:29,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 09:52:29,844 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:29,845 INFO L85 PathProgramCache]: Analyzing trace with hash 306670400, now seen corresponding path program 1 times [2021-11-09 09:52:29,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:29,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459000040] [2021-11-09 09:52:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:29,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:29,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:29,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:30,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:52:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:30,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 09:52:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 09:52:30,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:30,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459000040] [2021-11-09 09:52:30,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459000040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:30,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:30,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-09 09:52:30,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302418674] [2021-11-09 09:52:30,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:52:30,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:30,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:52:30,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:52:30,051 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:52:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:30,472 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2021-11-09 09:52:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:52:30,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-11-09 09:52:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:30,474 INFO L225 Difference]: With dead ends: 75 [2021-11-09 09:52:30,474 INFO L226 Difference]: Without dead ends: 75 [2021-11-09 09:52:30,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:52:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-09 09:52:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-11-09 09:52:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 60 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-11-09 09:52:30,477 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 57 [2021-11-09 09:52:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:30,478 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-11-09 09:52:30,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:52:30,478 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-11-09 09:52:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:52:30,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:30,479 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:30,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:52:30,479 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:30,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash 305388393, now seen corresponding path program 1 times [2021-11-09 09:52:30,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:30,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782655811] [2021-11-09 09:52:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:30,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:30,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:30,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:30,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:52:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:30,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 09:52:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:30,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-09 09:52:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 09:52:30,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:30,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782655811] [2021-11-09 09:52:30,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782655811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:30,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:30,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-09 09:52:30,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33267983] [2021-11-09 09:52:30,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:52:30,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:52:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:30,647 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 09:52:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:30,967 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-11-09 09:52:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:52:30,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2021-11-09 09:52:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:30,968 INFO L225 Difference]: With dead ends: 75 [2021-11-09 09:52:30,968 INFO L226 Difference]: Without dead ends: 73 [2021-11-09 09:52:30,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:52:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-09 09:52:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-09 09:52:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.125) internal successors, (63), 60 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-09 09:52:30,971 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 57 [2021-11-09 09:52:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:30,972 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-09 09:52:30,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 09:52:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-09 09:52:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:52:30,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:30,973 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:30,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:52:30,973 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_destroyErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 622503099, now seen corresponding path program 1 times [2021-11-09 09:52:30,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:30,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894272603] [2021-11-09 09:52:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:30,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:31,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:31,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:31,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:52:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:31,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 09:52:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:52:31,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:31,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894272603] [2021-11-09 09:52:31,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894272603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:31,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796376338] [2021-11-09 09:52:31,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:31,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:31,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:31,824 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:31,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:52:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:32,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 09:52:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:32,198 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 [2021-11-09 09:52:32,232 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:52:32,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:52:32,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 09:52:32,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 09:52:32,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-11-09 09:52:32,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,414 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 09:52:32,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 38 [2021-11-09 09:52:32,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-09 09:52:32,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:32,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-09 09:52:32,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752405615] [2021-11-09 09:52:32,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:52:32,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:52:32,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:52:32,486 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 09:52:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:34,197 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2021-11-09 09:52:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:52:34,200 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2021-11-09 09:52:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:34,201 INFO L225 Difference]: With dead ends: 85 [2021-11-09 09:52:34,201 INFO L226 Difference]: Without dead ends: 85 [2021-11-09 09:52:34,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:52:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-09 09:52:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2021-11-09 09:52:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.152542372881356) internal successors, (68), 63 states have internal predecessors, (68), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:52:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-09 09:52:34,206 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 60 [2021-11-09 09:52:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:34,206 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-09 09:52:34,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 09:52:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-09 09:52:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:52:34,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:34,207 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:34,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:34,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:34,408 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting dll_destroyErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:52:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash 622503100, now seen corresponding path program 1 times [2021-11-09 09:52:34,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:34,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219580744] [2021-11-09 09:52:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:34,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:34,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:34,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:52:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:35,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:52:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:35,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 09:52:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:52:35,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:35,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219580744] [2021-11-09 09:52:35,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219580744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:35,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645697255] [2021-11-09 09:52:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:35,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:35,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:35,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:35,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:52:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:35,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-09 09:52:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:35,671 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 [2021-11-09 09:52:35,800 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:52:35,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:52:35,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 09:52:35,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 09:52:35,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:35,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:52:35,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:35,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:52:36,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:36,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:52:36,095 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-09 09:52:36,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 70 [2021-11-09 09:52:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:36,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:52:36,114 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 09:52:36,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 81 [2021-11-09 09:52:36,700 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:52:36,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 40 [2021-11-09 09:52:36,708 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:52:36,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 19 [2021-11-09 09:52:39,104 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((dll_update_at_~head.offset Int)) (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_update_at_#in~head.base|) (+ 4 |c_dll_update_at_#in~head.offset|)))) (and (= (store |c_old(#memory_$Pointer$.base)| .cse0 (store (select |c_old(#memory_$Pointer$.base)| .cse0) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.base| .cse0) dll_update_at_~head.offset))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| .cse0 (store (select |c_old(#memory_$Pointer$.offset)| .cse0) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.offset| .cse0) dll_update_at_~head.offset))))))) (exists ((v_arrayElimIndex_8 Int)) (<= 12 (select |c_#length| v_arrayElimIndex_8)))) is different from true [2021-11-09 09:52:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:39,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:52:39,250 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-11-09 09:52:39,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 99 [2021-11-09 09:52:39,331 INFO L354 Elim1Store]: treesize reduction 134, result has 19.3 percent of original size [2021-11-09 09:52:39,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 86 [2021-11-09 09:52:39,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:52:39,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-11-09 09:52:39,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:52:39,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2021-11-09 09:53:06,918 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:53:06,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 59 [2021-11-09 09:53:06,965 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:53:06,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 48 [2021-11-09 09:53:07,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:53:07,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 63 [2021-11-09 09:53:07,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:53:07,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 56 [2021-11-09 09:53:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-11-09 09:53:08,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645697255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:08,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:08,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2021-11-09 09:53:08,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195367178] [2021-11-09 09:53:08,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 09:53:08,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:08,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 09:53:08,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2485, Unknown=12, NotChecked=100, Total=2756 [2021-11-09 09:53:08,990 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 53 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 45 states have internal predecessors, (97), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-09 09:53:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:29,931 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-11-09 09:53:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:53:29,932 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 45 states have internal predecessors, (97), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 60 [2021-11-09 09:53:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:29,933 INFO L225 Difference]: With dead ends: 89 [2021-11-09 09:53:29,933 INFO L226 Difference]: Without dead ends: 89 [2021-11-09 09:53:29,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=574, Invalid=6223, Unknown=13, NotChecked=162, Total=6972 [2021-11-09 09:53:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-09 09:53:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-11-09 09:53:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:53:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-09 09:53:29,940 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 60 [2021-11-09 09:53:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:29,941 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-09 09:53:29,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 45 states have internal predecessors, (97), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-09 09:53:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-09 09:53:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:53:29,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:29,942 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:29,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:30,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 09:53:30,156 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:53:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:30,156 INFO L85 PathProgramCache]: Analyzing trace with hash -678971685, now seen corresponding path program 1 times [2021-11-09 09:53:30,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:30,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287999312] [2021-11-09 09:53:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:30,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:30,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:30,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:53:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:31,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:53:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:32,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 09:53:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:53:32,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:32,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287999312] [2021-11-09 09:53:32,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287999312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:32,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388713067] [2021-11-09 09:53:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:32,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:32,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:32,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:32,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:53:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 09:53:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:33,277 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 [2021-11-09 09:53:33,454 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:53:33,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:53:33,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 09:53:33,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:33,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:53:33,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:33,933 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 09:53:33,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 43 [2021-11-09 09:53:34,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-09 09:53:34,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:53:34,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-09 09:53:34,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58763047] [2021-11-09 09:53:34,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:53:34,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:53:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:53:34,127 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 23 states have internal predecessors, (52), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:53:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:40,483 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-11-09 09:53:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:53:40,483 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 23 states have internal predecessors, (52), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2021-11-09 09:53:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:40,484 INFO L225 Difference]: With dead ends: 87 [2021-11-09 09:53:40,485 INFO L226 Difference]: Without dead ends: 87 [2021-11-09 09:53:40,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=322, Invalid=2540, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:53:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-09 09:53:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2021-11-09 09:53:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 66 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:53:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-11-09 09:53:40,490 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 63 [2021-11-09 09:53:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:40,491 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-11-09 09:53:40,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 23 states have internal predecessors, (52), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:53:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-11-09 09:53:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:53:40,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:40,492 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:40,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-09 09:53:40,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:40,696 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:53:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash -680253692, now seen corresponding path program 1 times [2021-11-09 09:53:40,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:40,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216715373] [2021-11-09 09:53:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:40,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:41,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:53:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:53:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:42,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 09:53:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-09 09:53:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:53:43,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:43,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216715373] [2021-11-09 09:53:43,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216715373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:43,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461940909] [2021-11-09 09:53:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:43,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:43,183 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:43,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:53:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:43,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 09:53:43,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:43,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 09:53:43,991 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:53:43,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:53:44,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-09 09:53:44,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 09:53:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:53:44,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:53:44,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,747 INFO L354 Elim1Store]: treesize reduction 92, result has 17.1 percent of original size [2021-11-09 09:53:44,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 85 [2021-11-09 09:53:44,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,805 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-09 09:53:44,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 87 [2021-11-09 09:53:48,581 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_update_at_~head.base Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| dll_update_at_~head.base (let ((.cse0 (select (select |c_old(#memory_$Pointer$.offset)| |c_dll_update_at_#in~head.base|) (+ 4 |c_dll_update_at_#in~head.offset|)))) (store (select |c_old(#memory_$Pointer$.base)| dll_update_at_~head.base) .cse0 (select (select |c_#memory_$Pointer$.base| dll_update_at_~head.base) .cse0)))))) is different from true [2021-11-09 09:53:48,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:48,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:53:48,651 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 09:53:48,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 54 [2021-11-09 09:53:48,658 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:53:48,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 35 [2021-11-09 09:53:49,372 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:53:49,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 35 [2021-11-09 09:53:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-09 09:53:53,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461940909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:53,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:53,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-11-09 09:53:53,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025211597] [2021-11-09 09:53:53,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 09:53:53,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 09:53:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2662, Unknown=2, NotChecked=104, Total=2970 [2021-11-09 09:53:53,126 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 46 states have internal predecessors, (98), 6 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-09 09:54:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:54:16,038 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-11-09 09:54:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:54:16,039 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 46 states have internal predecessors, (98), 6 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 63 [2021-11-09 09:54:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:54:16,040 INFO L225 Difference]: With dead ends: 88 [2021-11-09 09:54:16,041 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 09:54:16,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=644, Invalid=6163, Unknown=3, NotChecked=162, Total=6972 [2021-11-09 09:54:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 09:54:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-11-09 09:54:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:54:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-11-09 09:54:16,047 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 63 [2021-11-09 09:54:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:54:16,048 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-11-09 09:54:16,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 46 states have internal predecessors, (98), 6 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-09 09:54:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-11-09 09:54:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:54:16,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:54:16,049 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:54:16,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:54:16,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:16,252 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_destroyErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:54:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:54:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2050551616, now seen corresponding path program 2 times [2021-11-09 09:54:16,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:54:16,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001672179] [2021-11-09 09:54:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:54:16,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:54:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:17,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:54:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:17,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:54:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:54:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:20,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 09:54:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:54:20,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:54:20,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001672179] [2021-11-09 09:54:20,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001672179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:20,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334944862] [2021-11-09 09:54:20,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:54:20,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:20,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:54:20,891 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:54:20,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:54:21,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:54:21,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:54:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-09 09:54:21,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:54:21,387 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 [2021-11-09 09:54:21,469 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 [2021-11-09 09:54:21,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 09:54:21,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 09:54:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:54:21,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:54:21,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-11-09 09:54:21,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 09:54:21,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:54:21,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:54:21,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-11-09 09:54:22,197 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:54:22,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:54:22,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-09 09:54:22,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-09 09:54:22,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-09 09:54:22,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-09 09:54:22,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:54:22,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-09 09:54:22,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:54:22,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-09 09:54:23,453 INFO L354 Elim1Store]: treesize reduction 136, result has 21.4 percent of original size [2021-11-09 09:54:23,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 124 treesize of output 111 [2021-11-09 09:54:23,548 INFO L354 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2021-11-09 09:54:23,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 124 treesize of output 119 [2021-11-09 09:54:28,431 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_update_at_~head.offset Int)) (let ((.cse0 (+ 4 |c_dll_update_at_#in~head.offset|))) (let ((.cse1 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_update_at_#in~head.base|) .cse0))) (and (<= dll_update_at_~head.offset (select (select |c_old(#memory_$Pointer$.offset)| |c_dll_update_at_#in~head.base|) .cse0)) (= (store |c_old(#memory_$Pointer$.base)| .cse1 (store (select |c_old(#memory_$Pointer$.base)| .cse1) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.base| .cse1) dll_update_at_~head.offset))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| .cse1 (store (select |c_old(#memory_$Pointer$.offset)| .cse1) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.offset| .cse1) dll_update_at_~head.offset)))))))) is different from true [2021-11-09 09:54:28,997 INFO L354 Elim1Store]: treesize reduction 264, result has 32.5 percent of original size [2021-11-09 09:54:28,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 191 treesize of output 233 [2021-11-09 09:54:29,475 INFO L354 Elim1Store]: treesize reduction 234, result has 30.6 percent of original size [2021-11-09 09:54:29,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 207 treesize of output 251 [2021-11-09 09:55:09,970 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_dll_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_dll_update_at_#in~head.base|) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.offset| |c_dll_update_at_#in~head.base|) dll_update_at_~head.offset)))) (<= dll_update_at_~head.offset |c_dll_update_at_#in~head.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_dll_update_at_#in~head.base|) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.base| |c_dll_update_at_#in~head.base|) dll_update_at_~head.offset)))))) is different from true [2021-11-09 09:55:10,361 INFO L354 Elim1Store]: treesize reduction 276, result has 16.6 percent of original size [2021-11-09 09:55:10,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 482 treesize of output 385 [2021-11-09 09:55:10,557 INFO L354 Elim1Store]: treesize reduction 276, result has 16.6 percent of original size [2021-11-09 09:55:10,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 449 treesize of output 382 [2021-11-09 09:59:13,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_destroy_~head.base] [2021-11-09 09:59:13,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:59:13,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-09 09:59:13,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078846153] [2021-11-09 09:59:13,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:59:13,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:59:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:59:13,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3038, Unknown=2, NotChecked=222, Total=3422 [2021-11-09 09:59:13,526 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 30 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:59:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:59:24,205 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-11-09 09:59:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:59:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 30 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 66 [2021-11-09 09:59:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:59:24,208 INFO L225 Difference]: With dead ends: 121 [2021-11-09 09:59:24,208 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 09:59:24,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=395, Invalid=6253, Unknown=2, NotChecked=322, Total=6972 [2021-11-09 09:59:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 09:59:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2021-11-09 09:59:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 100 states have internal predecessors, (104), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 09:59:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2021-11-09 09:59:24,218 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 66 [2021-11-09 09:59:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:59:24,219 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2021-11-09 09:59:24,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 30 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:59:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2021-11-09 09:59:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 09:59:24,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:59:24,221 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:59:24,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:59:24,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:59:24,428 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 09:59:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:59:24,428 INFO L85 PathProgramCache]: Analyzing trace with hash 662049375, now seen corresponding path program 2 times [2021-11-09 09:59:24,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:59:24,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315664362] [2021-11-09 09:59:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:59:24,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:59:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:59:24,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:59:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:59:24,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 09:59:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:59:26,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-09 09:59:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:59:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 09:59:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:59:27,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-09 09:59:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:59:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:59:28,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:59:28,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315664362] [2021-11-09 09:59:28,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315664362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:59:28,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427789961] [2021-11-09 09:59:28,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:59:28,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:59:28,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:59:28,142 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:59:28,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:59:29,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:59:29,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:59:29,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 09:59:29,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:59:29,852 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 [2021-11-09 09:59:29,869 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 [2021-11-09 09:59:30,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:59:30,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:59:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:59:30,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:59:30,453 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:59:30,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 75 [2021-11-09 09:59:30,487 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:59:30,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 84 [2021-11-09 09:59:31,976 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:59:31,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 53 [2021-11-09 09:59:32,015 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-09 09:59:32,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 42 [2021-11-09 09:59:32,025 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:59:32,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 24 [2021-11-09 10:00:18,678 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-09 10:00:18,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 93 [2021-11-09 10:00:18,886 INFO L354 Elim1Store]: treesize reduction 68, result has 40.4 percent of original size [2021-11-09 10:00:18,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 93 [2021-11-09 10:00:22,793 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:00:22,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 73 [2021-11-09 10:00:22,836 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-09 10:00:22,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 71 [2021-11-09 10:00:26,097 INFO L354 Elim1Store]: treesize reduction 68, result has 30.6 percent of original size [2021-11-09 10:00:26,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 102 [2021-11-09 10:00:30,404 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:00:30,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 84 [2021-11-09 10:01:08,121 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-11-09 10:01:08,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 70 [2021-11-09 10:01:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 27 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:01:10,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427789961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:01:10,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:01:10,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 55 [2021-11-09 10:01:10,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492840855] [2021-11-09 10:01:10,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 10:01:10,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:01:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 10:01:10,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2840, Unknown=35, NotChecked=0, Total=3080 [2021-11-09 10:01:10,593 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 56 states, 55 states have (on average 2.036363636363636) internal successors, (112), 48 states have internal predecessors, (112), 6 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-09 10:04:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:04:39,792 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2021-11-09 10:04:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 10:04:39,793 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.036363636363636) internal successors, (112), 48 states have internal predecessors, (112), 6 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 69 [2021-11-09 10:04:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:04:39,795 INFO L225 Difference]: With dead ends: 144 [2021-11-09 10:04:39,795 INFO L226 Difference]: Without dead ends: 99 [2021-11-09 10:04:39,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 183.6s TimeCoverageRelationStatistics Valid=663, Invalid=7834, Unknown=59, NotChecked=0, Total=8556 [2021-11-09 10:04:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-09 10:04:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-11-09 10:04:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:04:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-11-09 10:04:39,803 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 69 [2021-11-09 10:04:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:04:39,804 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-11-09 10:04:39,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.036363636363636) internal successors, (112), 48 states have internal predecessors, (112), 6 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-09 10:04:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-11-09 10:04:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 10:04:39,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:04:39,806 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:04:39,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:04:40,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:04:40,012 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting dll_destroyErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-09 10:04:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:04:40,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2140772564, now seen corresponding path program 3 times [2021-11-09 10:04:40,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:04:40,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536963334] [2021-11-09 10:04:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:04:40,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:04:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:04:40,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:04:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:04:40,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 10:04:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:04:40,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-09 10:04:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:04:40,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-09 10:04:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:04:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:04:40,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:04:40,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536963334] [2021-11-09 10:04:40,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536963334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:04:40,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209846138] [2021-11-09 10:04:40,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:04:40,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:04:40,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:04:40,536 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:04:40,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:04:42,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:04:42,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:04:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:04:42,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:04:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:04:42,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209846138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:04:42,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:04:42,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-11-09 10:04:42,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704685009] [2021-11-09 10:04:42,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:04:42,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:04:42,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:04:42,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:04:42,743 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 12 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-09 10:04:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:04:43,420 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-11-09 10:04:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:04:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 74 [2021-11-09 10:04:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:04:43,421 INFO L225 Difference]: With dead ends: 35 [2021-11-09 10:04:43,421 INFO L226 Difference]: Without dead ends: 0 [2021-11-09 10:04:43,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:04:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-09 10:04:43,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-09 10:04:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:04:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-09 10:04:43,422 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2021-11-09 10:04:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:04:43,422 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 10:04:43,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-09 10:04:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-09 10:04:43,423 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-09 10:04:43,425 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_destroyErr0REQUIRES_VIOLATION [2021-11-09 10:04:43,426 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_destroyErr1REQUIRES_VIOLATION [2021-11-09 10:04:43,426 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:04:43,426 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:04:43,426 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:04:43,426 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_get_data_atErr0REQUIRES_VIOLATION [2021-11-09 10:04:43,426 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_get_data_atErr1REQUIRES_VIOLATION [2021-11-09 10:04:43,426 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_get_data_atErr2REQUIRES_VIOLATION [2021-11-09 10:04:43,427 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_get_data_atErr3REQUIRES_VIOLATION [2021-11-09 10:04:43,427 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-11-09 10:04:43,427 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-11-09 10:04:43,427 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-11-09 10:04:43,427 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-11-09 10:04:43,427 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr4REQUIRES_VIOLATION [2021-11-09 10:04:43,427 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr5REQUIRES_VIOLATION [2021-11-09 10:04:43,427 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_update_atErr0REQUIRES_VIOLATION [2021-11-09 10:04:43,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_update_atErr1REQUIRES_VIOLATION [2021-11-09 10:04:43,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_update_atErr2REQUIRES_VIOLATION [2021-11-09 10:04:43,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_update_atErr3REQUIRES_VIOLATION [2021-11-09 10:04:43,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-11-09 10:04:43,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-11-09 10:04:43,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr0REQUIRES_VIOLATION [2021-11-09 10:04:43,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr1REQUIRES_VIOLATION [2021-11-09 10:04:43,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr2REQUIRES_VIOLATION [2021-11-09 10:04:43,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr3REQUIRES_VIOLATION [2021-11-09 10:04:43,429 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr4REQUIRES_VIOLATION [2021-11-09 10:04:43,429 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr5REQUIRES_VIOLATION [2021-11-09 10:04:43,429 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr6REQUIRES_VIOLATION [2021-11-09 10:04:43,429 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr7REQUIRES_VIOLATION [2021-11-09 10:04:43,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:04:43,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:04:43,633 INFO L731 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:04:43,635 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 10:04:43,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:04:43 BoogieIcfgContainer [2021-11-09 10:04:43,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 10:04:43,640 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 10:04:43,640 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 10:04:43,640 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 10:04:43,641 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:52:10" (3/4) ... [2021-11-09 10:04:43,644 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-09 10:04:43,652 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-11-09 10:04:43,653 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_update_at [2021-11-09 10:04:43,653 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-11-09 10:04:43,653 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-11-09 10:04:43,653 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_create [2021-11-09 10:04:43,653 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-11-09 10:04:43,654 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-11-09 10:04:43,654 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_get_data_at [2021-11-09 10:04:43,654 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-11-09 10:04:43,654 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_destroy [2021-11-09 10:04:43,655 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-11-09 10:04:43,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-11-09 10:04:43,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-09 10:04:43,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-09 10:04:43,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 10:04:43,718 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 10:04:43,719 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 10:04:43,720 INFO L168 Benchmark]: Toolchain (without parser) took 754754.76 ms. Allocated memory was 104.9 MB in the beginning and 195.0 MB in the end (delta: 90.2 MB). Free memory was 72.0 MB in the beginning and 67.4 MB in the end (delta: 4.6 MB). Peak memory consumption was 94.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:04:43,720 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 104.9 MB. Free memory is still 59.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:04:43,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 580.61 ms. Allocated memory is still 104.9 MB. Free memory was 71.8 MB in the beginning and 72.3 MB in the end (delta: -504.1 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:04:43,721 INFO L168 Benchmark]: Boogie Preprocessor took 111.81 ms. Allocated memory is still 104.9 MB. Free memory was 72.3 MB in the beginning and 69.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:04:43,722 INFO L168 Benchmark]: RCFGBuilder took 792.46 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 69.4 MB in the beginning and 105.7 MB in the end (delta: -36.3 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.1 GB. [2021-11-09 10:04:43,722 INFO L168 Benchmark]: TraceAbstraction took 753175.43 ms. Allocated memory was 134.2 MB in the beginning and 195.0 MB in the end (delta: 60.8 MB). Free memory was 105.0 MB in the beginning and 71.3 MB in the end (delta: 33.7 MB). Peak memory consumption was 94.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:04:43,723 INFO L168 Benchmark]: Witness Printer took 79.21 ms. Allocated memory is still 195.0 MB. Free memory was 71.3 MB in the beginning and 67.4 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-09 10:04:43,725 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 104.9 MB. Free memory is still 59.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 580.61 ms. Allocated memory is still 104.9 MB. Free memory was 71.8 MB in the beginning and 72.3 MB in the end (delta: -504.1 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 111.81 ms. Allocated memory is still 104.9 MB. Free memory was 72.3 MB in the beginning and 69.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 792.46 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 69.4 MB in the beginning and 105.7 MB in the end (delta: -36.3 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 753175.43 ms. Allocated memory was 134.2 MB in the beginning and 195.0 MB in the end (delta: 60.8 MB). Free memory was 105.0 MB in the beginning and 71.3 MB in the end (delta: 33.7 MB). Peak memory consumption was 94.5 MB. Max. memory is 16.1 GB. * Witness Printer took 79.21 ms. Allocated memory is still 195.0 MB. Free memory was 71.3 MB in the beginning and 67.4 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 612]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 622]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 622]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 641]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 624]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 111 locations, 29 error locations. Started 1 CEGAR loops. OverallTime: 753.1s, OverallIterations: 27, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 282.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1093 SDtfs, 2760 SDslu, 4034 SDs, 0 SdLazy, 17385 SolverSat, 839 SolverUnsat, 69 SolverUnknown, 0 SolverNotchecked, 152.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1386 GetRequests, 641 SyntacticMatches, 14 SemanticMatches, 731 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 7260 ImplicationChecksByTransitivity, 282.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=25, InterpolantAutomatonStates: 419, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 27 MinimizatonAttempts, 326 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 166.2s InterpolantComputationTime, 1655 NumberOfCodeBlocks, 1641 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1616 ConstructedInterpolants, 78 QuantifiedInterpolants, 18965 SizeOfPredicates, 90 NumberOfNonLiveVariables, 3045 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 39 InterpolantComputations, 13 PerfectInterpolantSequences, 296/584 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 29 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-09 10:04:43,940 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-09 10:04:43,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47363e9-c2e2-42bb-bacf-5ef10661add7/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE