./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU --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 e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:24:30,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:24:30,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:24:30,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:24:30,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:24:30,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:24:30,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:24:30,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:24:30,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:24:30,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:24:30,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:24:30,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:24:30,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:24:30,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:24:30,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:24:30,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:24:30,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:24:30,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:24:30,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:24:30,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:24:30,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:24:30,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:24:30,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:24:30,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:24:30,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:24:30,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:24:30,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:24:30,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:24:30,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:24:30,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:24:30,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:24:30,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:24:30,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:24:30,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:24:30,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:24:30,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:24:30,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:24:30,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:24:30,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:24:30,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:24:30,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:24:30,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:24:30,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:24:30,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:24:30,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:24:30,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:24:30,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:24:30,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:24:30,777 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:24:30,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:24:30,778 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:24:30,778 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:24:30,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:24:30,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:24:30,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:24:30,780 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:24:30,780 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:24:30,780 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:24:30,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:24:30,781 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:24:30,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:24:30,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:24:30,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:24:30,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:24:30,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:24:30,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:24:30,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:24:30,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:24:30,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:24:30,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:24:30,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:24:30,785 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_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-11-02 22:24:31,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:24:31,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:24:31,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:24:31,097 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:24:31,098 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:24:31,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-02 22:24:31,168 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/data/c0f8dc536/99018b67214d45a38c775d35558336a5/FLAG67bff0535 [2021-11-02 22:24:31,685 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:24:31,685 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-02 22:24:31,700 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/data/c0f8dc536/99018b67214d45a38c775d35558336a5/FLAG67bff0535 [2021-11-02 22:24:32,006 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/data/c0f8dc536/99018b67214d45a38c775d35558336a5 [2021-11-02 22:24:32,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:24:32,010 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:24:32,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:24:32,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:24:32,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:24:32,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7174b4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32, skipping insertion in model container [2021-11-02 22:24:32,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:24:32,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:24:32,430 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_be942863-23fe-43ce-98bc-8af657849b57/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-02 22:24:32,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:24:32,452 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:24:32,509 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_be942863-23fe-43ce-98bc-8af657849b57/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-02 22:24:32,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:24:32,545 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:24:32,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32 WrapperNode [2021-11-02 22:24:32,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:24:32,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:24:32,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:24:32,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:24:32,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:24:32,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:24:32,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:24:32,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:24:32,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32" (1/1) ... [2021-11-02 22:24:32,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:24:32,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:32,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:24:32,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:24:32,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:24:32,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:24:32,734 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:24:32,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:24:32,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:24:32,735 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 22:24:32,735 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-02 22:24:32,735 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-11-02 22:24:32,736 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2021-11-02 22:24:32,736 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_prepend [2021-11-02 22:24:32,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:24:32,736 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:24:32,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:24:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:24:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:24:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:24:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:24:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:24:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:24:32,738 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:24:32,738 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:24:32,738 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:24:32,738 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:24:32,738 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:24:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:24:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:24:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:24:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:24:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:24:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:24:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:24:32,741 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:24:32,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:24:32,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:24:32,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:24:32,741 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:24:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:24:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:24:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:24:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:24:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:24:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:24:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:24:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:24:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:24:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:24:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:24:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:24:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:24:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:24:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:24:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:24:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:24:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:24:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:24:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:24:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:24:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:24:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:24:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:24:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:24:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:24:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:24:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:24:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:24:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:24:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:24:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:24:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:24:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:24:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:24:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:24:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:24:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:24:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:24:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:24:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:24:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:24:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:24:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:24:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:24:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:24:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:24:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:24:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:24:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:24:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:24:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:24:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:24:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:24:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:24:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:24:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:24:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:24:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:24:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:24:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:24:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:24:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:24:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:24:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:24:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:24:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:24:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:24:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:24:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:24:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:24:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:24:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:24:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:24:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:24:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 22:24:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-02 22:24:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:24:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:24:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:24:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-11-02 22:24:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2021-11-02 22:24:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:24:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:24:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_prepend [2021-11-02 22:24:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:24:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:24:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:24:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:24:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:24:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:24:33,197 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 22:24:33,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:24:33,502 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-02 22:24:33,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:24:33 BoogieIcfgContainer [2021-11-02 22:24:33,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:24:33,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:24:33,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:24:33,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:24:33,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:24:32" (1/3) ... [2021-11-02 22:24:33,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2d8021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:24:33, skipping insertion in model container [2021-11-02 22:24:33,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:32" (2/3) ... [2021-11-02 22:24:33,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2d8021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:24:33, skipping insertion in model container [2021-11-02 22:24:33,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:24:33" (3/3) ... [2021-11-02 22:24:33,517 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-11-02 22:24:33,527 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:24:33,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2021-11-02 22:24:33,564 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:24:33,570 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 [2021-11-02 22:24:33,570 INFO L340 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2021-11-02 22:24:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 131 states have internal predecessors, (143), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:24:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:24:33,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:33,596 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:33,596 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1242111983, now seen corresponding path program 1 times [2021-11-02 22:24:33,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:33,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608961825] [2021-11-02 22:24:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:33,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:33,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:33,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:33,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608961825] [2021-11-02 22:24:33,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608961825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:33,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:33,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:24:33,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932995463] [2021-11-02 22:24:33,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:24:33,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:33,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:24:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:24:33,950 INFO L87 Difference]: Start difference. First operand has 147 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 131 states have internal predecessors, (143), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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, (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) [2021-11-02 22:24:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:34,400 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2021-11-02 22:24:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:24:34,401 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, (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 12 [2021-11-02 22:24:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:34,412 INFO L225 Difference]: With dead ends: 163 [2021-11-02 22:24:34,412 INFO L226 Difference]: Without dead ends: 157 [2021-11-02 22:24:34,414 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 [2021-11-02 22:24:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-02 22:24:34,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2021-11-02 22:24:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 124 states have internal predecessors, (131), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:24:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2021-11-02 22:24:34,488 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 12 [2021-11-02 22:24:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:34,488 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2021-11-02 22:24:34,488 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, (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) [2021-11-02 22:24:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2021-11-02 22:24:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:24:34,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:34,490 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:34,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:24:34,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:34,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:34,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1242111984, now seen corresponding path program 1 times [2021-11-02 22:24:34,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:34,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888551279] [2021-11-02 22:24:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:34,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:34,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:34,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:34,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888551279] [2021-11-02 22:24:34,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888551279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:34,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:34,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:24:34,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512003430] [2021-11-02 22:24:34,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:24:34,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:24:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:24:34,654 INFO L87 Difference]: Start difference. First operand 138 states and 146 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, (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) [2021-11-02 22:24:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:34,932 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2021-11-02 22:24:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:24:34,933 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, (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 12 [2021-11-02 22:24:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:34,938 INFO L225 Difference]: With dead ends: 154 [2021-11-02 22:24:34,938 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 22:24:34,939 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 [2021-11-02 22:24:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 22:24:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 135. [2021-11-02 22:24:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 68 states have (on average 1.8823529411764706) internal successors, (128), 121 states have internal predecessors, (128), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:24:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 143 transitions. [2021-11-02 22:24:34,967 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 143 transitions. Word has length 12 [2021-11-02 22:24:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:34,968 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 143 transitions. [2021-11-02 22:24:34,968 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, (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) [2021-11-02 22:24:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 143 transitions. [2021-11-02 22:24:34,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:24:34,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:34,969 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:34,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:24:34,970 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:34,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:34,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2504775, now seen corresponding path program 1 times [2021-11-02 22:24:34,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:34,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126342011] [2021-11-02 22:24:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:34,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:35,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:35,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:35,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:35,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126342011] [2021-11-02 22:24:35,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126342011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:35,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:35,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:24:35,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573504897] [2021-11-02 22:24:35,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:24:35,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:24:35,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:24:35,186 INFO L87 Difference]: Start difference. First operand 135 states and 143 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-02 22:24:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:35,676 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2021-11-02 22:24:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:24:35,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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 20 [2021-11-02 22:24:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:35,679 INFO L225 Difference]: With dead ends: 165 [2021-11-02 22:24:35,679 INFO L226 Difference]: Without dead ends: 165 [2021-11-02 22:24:35,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:24:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-02 22:24:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 136. [2021-11-02 22:24:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 69 states have (on average 1.8695652173913044) internal successors, (129), 122 states have internal predecessors, (129), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:24:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2021-11-02 22:24:35,693 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 20 [2021-11-02 22:24:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:35,694 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2021-11-02 22:24:35,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-02 22:24:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2021-11-02 22:24:35,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:24:35,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:35,695 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] [2021-11-02 22:24:35,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:24:35,696 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1485368204, now seen corresponding path program 1 times [2021-11-02 22:24:35,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:35,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409846962] [2021-11-02 22:24:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:35,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:35,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:35,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:35,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:24:35,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:35,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409846962] [2021-11-02 22:24:35,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409846962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:35,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:35,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:24:35,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675832181] [2021-11-02 22:24:35,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:24:35,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:24:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:24:35,890 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:24:36,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:36,373 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2021-11-02 22:24:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:24:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-02 22:24:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:36,375 INFO L225 Difference]: With dead ends: 155 [2021-11-02 22:24:36,375 INFO L226 Difference]: Without dead ends: 155 [2021-11-02 22:24:36,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:24:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-02 22:24:36,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2021-11-02 22:24:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 69 states have (on average 1.855072463768116) internal successors, (128), 121 states have internal predecessors, (128), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:24:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 143 transitions. [2021-11-02 22:24:36,382 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 143 transitions. Word has length 30 [2021-11-02 22:24:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:36,382 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 143 transitions. [2021-11-02 22:24:36,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:24:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 143 transitions. [2021-11-02 22:24:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:24:36,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:36,399 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] [2021-11-02 22:24:36,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:24:36,400 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1485368205, now seen corresponding path program 1 times [2021-11-02 22:24:36,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:36,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295900750] [2021-11-02 22:24:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:36,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:36,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:36,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:36,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:36,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:36,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295900750] [2021-11-02 22:24:36,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295900750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:36,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:36,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:24:36,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090293270] [2021-11-02 22:24:36,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:24:36,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:24:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:24:36,596 INFO L87 Difference]: Start difference. First operand 135 states and 143 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:24:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:37,108 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2021-11-02 22:24:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:24:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-02 22:24:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:37,110 INFO L225 Difference]: With dead ends: 154 [2021-11-02 22:24:37,110 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 22:24:37,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:24:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 22:24:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2021-11-02 22:24:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 69 states have (on average 1.8405797101449275) internal successors, (127), 120 states have internal predecessors, (127), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:24:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2021-11-02 22:24:37,117 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 30 [2021-11-02 22:24:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:37,118 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2021-11-02 22:24:37,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:24:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2021-11-02 22:24:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:24:37,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:37,119 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] [2021-11-02 22:24:37,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:24:37,120 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1509701645, now seen corresponding path program 1 times [2021-11-02 22:24:37,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:37,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157459668] [2021-11-02 22:24:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:37,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:37,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:37,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:37,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:37,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:37,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157459668] [2021-11-02 22:24:37,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157459668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:37,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775510855] [2021-11-02 22:24:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:37,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:37,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:37,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:37,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:24:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:24:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:37,551 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 [2021-11-02 22:24:37,808 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:24:37,808 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 [2021-11-02 22:24:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:37,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775510855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:37,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:37,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-11-02 22:24:37,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570023373] [2021-11-02 22:24:37,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:24:37,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:24:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:24:37,946 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-02 22:24:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:38,663 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2021-11-02 22:24:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:24:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-11-02 22:24:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:38,665 INFO L225 Difference]: With dead ends: 161 [2021-11-02 22:24:38,665 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 22:24:38,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:24:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 22:24:38,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 139. [2021-11-02 22:24:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 73 states have (on average 1.821917808219178) internal successors, (133), 124 states have internal predecessors, (133), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:24:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-11-02 22:24:38,673 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 32 [2021-11-02 22:24:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:38,673 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-11-02 22:24:38,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-02 22:24:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-11-02 22:24:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:24:38,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:38,675 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] [2021-11-02 22:24:38,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:38,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:38,895 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:38,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:38,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1509701646, now seen corresponding path program 1 times [2021-11-02 22:24:38,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:38,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343573890] [2021-11-02 22:24:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:38,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:39,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:39,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:39,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:39,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:39,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343573890] [2021-11-02 22:24:39,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343573890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:39,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488623355] [2021-11-02 22:24:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:39,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:39,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:39,222 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:39,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:24:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:39,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:24:39,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:39,417 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 [2021-11-02 22:24:39,421 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 [2021-11-02 22:24:39,734 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:24:39,734 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 [2021-11-02 22:24:39,743 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:24:39,743 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 [2021-11-02 22:24:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:39,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488623355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:39,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:39,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2021-11-02 22:24:39,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585274511] [2021-11-02 22:24:39,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:24:39,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:39,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:24:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:24:39,846 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-02 22:24:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:40,706 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2021-11-02 22:24:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:24:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-11-02 22:24:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:40,710 INFO L225 Difference]: With dead ends: 160 [2021-11-02 22:24:40,710 INFO L226 Difference]: Without dead ends: 160 [2021-11-02 22:24:40,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:24:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-02 22:24:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 139. [2021-11-02 22:24:40,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 73 states have (on average 1.8082191780821917) internal successors, (132), 124 states have internal predecessors, (132), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:24:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2021-11-02 22:24:40,718 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 32 [2021-11-02 22:24:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:40,718 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2021-11-02 22:24:40,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-02 22:24:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2021-11-02 22:24:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:24:40,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:40,720 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, 1, 1] [2021-11-02 22:24:40,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:40,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:24:40,935 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash -875510909, now seen corresponding path program 1 times [2021-11-02 22:24:40,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:40,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346271553] [2021-11-02 22:24:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:40,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:41,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:41,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:41,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:41,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346271553] [2021-11-02 22:24:41,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346271553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:41,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780674627] [2021-11-02 22:24:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:41,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:41,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:41,068 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:41,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:24:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:41,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:24:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:41,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780674627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:41,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:41,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-11-02 22:24:41,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005988653] [2021-11-02 22:24:41,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:24:41,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:24:41,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:24:41,392 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:24:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:41,761 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2021-11-02 22:24:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:24:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-02 22:24:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:41,763 INFO L225 Difference]: With dead ends: 159 [2021-11-02 22:24:41,764 INFO L226 Difference]: Without dead ends: 159 [2021-11-02 22:24:41,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:24:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-02 22:24:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 139. [2021-11-02 22:24:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 73 states have (on average 1.7945205479452055) internal successors, (131), 124 states have internal predecessors, (131), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:24:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2021-11-02 22:24:41,769 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 34 [2021-11-02 22:24:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:41,769 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2021-11-02 22:24:41,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:24:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2021-11-02 22:24:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:24:41,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:41,771 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, 1, 1, 1] [2021-11-02 22:24:41,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:41,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:24:41,971 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1375815061, now seen corresponding path program 1 times [2021-11-02 22:24:41,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:41,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333202977] [2021-11-02 22:24:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:41,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:42,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:42,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:42,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:24:42,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:42,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333202977] [2021-11-02 22:24:42,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333202977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:42,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728187865] [2021-11-02 22:24:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:42,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:42,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:42,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:42,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:24:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:24:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:24:42,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728187865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:42,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:42,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 6 [2021-11-02 22:24:42,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256373241] [2021-11-02 22:24:42,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:24:42,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:42,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:24:42,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:24:42,365 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-02 22:24:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:42,737 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2021-11-02 22:24:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:24:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-02 22:24:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:42,739 INFO L225 Difference]: With dead ends: 163 [2021-11-02 22:24:42,739 INFO L226 Difference]: Without dead ends: 163 [2021-11-02 22:24:42,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:24:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-02 22:24:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 142. [2021-11-02 22:24:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.7894736842105263) internal successors, (136), 127 states have internal predecessors, (136), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:24:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2021-11-02 22:24:42,744 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 35 [2021-11-02 22:24:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:42,745 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2021-11-02 22:24:42,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-02 22:24:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2021-11-02 22:24:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:24:42,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:42,746 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, 1, 1, 1] [2021-11-02 22:24:42,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:42,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:42,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr5REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1375815060, now seen corresponding path program 1 times [2021-11-02 22:24:42,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:42,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355135004] [2021-11-02 22:24:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:42,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:43,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:43,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:43,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:43,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:43,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355135004] [2021-11-02 22:24:43,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355135004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:43,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137756550] [2021-11-02 22:24:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:43,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:43,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:43,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:43,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:24:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:43,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:24:43,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:43,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137756550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:43,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:43,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-11-02 22:24:43,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016592369] [2021-11-02 22:24:43,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:24:43,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:43,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:24:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:24:43,584 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 22:24:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:44,145 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2021-11-02 22:24:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:24:44,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-11-02 22:24:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:44,147 INFO L225 Difference]: With dead ends: 168 [2021-11-02 22:24:44,147 INFO L226 Difference]: Without dead ends: 168 [2021-11-02 22:24:44,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:24:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-02 22:24:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2021-11-02 22:24:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.7763157894736843) internal successors, (135), 127 states have internal predecessors, (135), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:24:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2021-11-02 22:24:44,153 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 35 [2021-11-02 22:24:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:44,153 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2021-11-02 22:24:44,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 22:24:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2021-11-02 22:24:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:24:44,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:44,155 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, 1, 1, 1, 1] [2021-11-02 22:24:44,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:44,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:24:44,355 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_circular_createErr6REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:44,356 INFO L85 PathProgramCache]: Analyzing trace with hash 299406079, now seen corresponding path program 1 times [2021-11-02 22:24:44,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:44,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246097251] [2021-11-02 22:24:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:44,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:44,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:44,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:44,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:24:44,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:44,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246097251] [2021-11-02 22:24:44,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246097251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:44,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:44,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:24:44,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547028178] [2021-11-02 22:24:44,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:24:44,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:44,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:24:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:24:44,463 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:24:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:44,937 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2021-11-02 22:24:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:24:44,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-02 22:24:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:44,939 INFO L225 Difference]: With dead ends: 161 [2021-11-02 22:24:44,939 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 22:24:44,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:24:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 22:24:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2021-11-02 22:24:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 76 states have (on average 1.763157894736842) internal successors, (134), 126 states have internal predecessors, (134), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:24:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2021-11-02 22:24:44,945 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 36 [2021-11-02 22:24:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:44,945 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2021-11-02 22:24:44,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:24:44,946 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2021-11-02 22:24:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:24:44,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:44,948 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, 1, 1, 1, 1] [2021-11-02 22:24:44,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:24:44,948 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 299406080, now seen corresponding path program 1 times [2021-11-02 22:24:44,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:44,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446037236] [2021-11-02 22:24:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:44,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:45,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:45,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:45,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:45,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446037236] [2021-11-02 22:24:45,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446037236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:45,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:45,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:24:45,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245093256] [2021-11-02 22:24:45,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:24:45,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:24:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:24:45,167 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:24:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:45,651 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-11-02 22:24:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:24:45,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-02 22:24:45,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:45,653 INFO L225 Difference]: With dead ends: 159 [2021-11-02 22:24:45,653 INFO L226 Difference]: Without dead ends: 159 [2021-11-02 22:24:45,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:24:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-02 22:24:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 140. [2021-11-02 22:24:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 76 states have (on average 1.75) internal successors, (133), 125 states have internal predecessors, (133), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:24:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2021-11-02 22:24:45,659 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 36 [2021-11-02 22:24:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:45,659 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2021-11-02 22:24:45,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:24:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2021-11-02 22:24:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:24:45,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:45,660 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:45,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:24:45,661 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:45,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1520390209, now seen corresponding path program 1 times [2021-11-02 22:24:45,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:45,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606444651] [2021-11-02 22:24:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:45,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:45,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:45,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:24:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:45,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-02 22:24:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:45,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-02 22:24:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 22:24:45,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:45,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606444651] [2021-11-02 22:24:45,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606444651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:45,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342475422] [2021-11-02 22:24:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:45,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:45,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:45,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:45,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:24:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:46,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:24:46,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:24:46,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342475422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:46,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:24:46,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-11-02 22:24:46,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105086134] [2021-11-02 22:24:46,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:24:46,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:46,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:24:46,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:24:46,205 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:24:46,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:46,245 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-11-02 22:24:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:24:46,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2021-11-02 22:24:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:46,249 INFO L225 Difference]: With dead ends: 128 [2021-11-02 22:24:46,250 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 22:24:46,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:24:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 22:24:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-11-02 22:24:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 114 states have internal predecessors, (119), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:24:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2021-11-02 22:24:46,256 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 47 [2021-11-02 22:24:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:46,257 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2021-11-02 22:24:46,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:24:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2021-11-02 22:24:46,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:24:46,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:46,260 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:46,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:46,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:24:46,483 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_circular_prependErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:46,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1434175165, now seen corresponding path program 1 times [2021-11-02 22:24:46,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:46,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919313590] [2021-11-02 22:24:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:46,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:46,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:46,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:24:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:46,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:24:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:46,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:24:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:46,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:24:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:24:47,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:47,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919313590] [2021-11-02 22:24:47,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919313590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:47,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888467532] [2021-11-02 22:24:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:47,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:47,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:47,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:47,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:24:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:47,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:24:47,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:47,300 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 [2021-11-02 22:24:47,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-02 22:24:47,775 INFO L354 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2021-11-02 22:24:47,776 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 2 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:24:47,966 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:24:47,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2021-11-02 22:24:48,047 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 22:24:48,048 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 27 treesize of output 32 [2021-11-02 22:24:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:24:48,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888467532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:48,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:48,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-02 22:24:48,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304694443] [2021-11-02 22:24:48,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:24:48,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:24:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:24:48,112 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 26 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:24:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:49,439 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2021-11-02 22:24:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:24:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 53 [2021-11-02 22:24:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:49,441 INFO L225 Difference]: With dead ends: 141 [2021-11-02 22:24:49,441 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 22:24:49,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:24:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 22:24:49,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2021-11-02 22:24:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 69 states have (on average 1.608695652173913) internal successors, (111), 106 states have internal predecessors, (111), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:24:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2021-11-02 22:24:49,447 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 53 [2021-11-02 22:24:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:49,447 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2021-11-02 22:24:49,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:24:49,448 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2021-11-02 22:24:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:24:49,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:49,449 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:49,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:49,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:24:49,667 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_circular_prependErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:49,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:49,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1434175164, now seen corresponding path program 1 times [2021-11-02 22:24:49,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:49,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586004095] [2021-11-02 22:24:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:49,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:49,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:49,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:24:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:50,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:24:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:50,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:24:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:50,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:24:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:24:50,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:50,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586004095] [2021-11-02 22:24:50,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586004095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:50,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656232737] [2021-11-02 22:24:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:50,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:50,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:50,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:50,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:24:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:50,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 22:24:50,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:50,561 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 [2021-11-02 22:24:50,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-02 22:24:50,604 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 [2021-11-02 22:24:50,874 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:24:50,875 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 20 treesize of output 20 [2021-11-02 22:24:51,091 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-02 22:24:51,092 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 2 case distinctions, treesize of input 19 treesize of output 30 [2021-11-02 22:24:51,752 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-02 22:24:51,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2021-11-02 22:24:51,939 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-02 22:24:51,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 46 [2021-11-02 22:24:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:24:52,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656232737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:52,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:52,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-11-02 22:24:52,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898888454] [2021-11-02 22:24:52,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:24:52,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:52,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:24:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:24:52,206 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 29 states, 25 states have (on average 2.96) internal successors, (74), 22 states have internal predecessors, (74), 9 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:24:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:54,252 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2021-11-02 22:24:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:24:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.96) internal successors, (74), 22 states have internal predecessors, (74), 9 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2021-11-02 22:24:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:54,254 INFO L225 Difference]: With dead ends: 141 [2021-11-02 22:24:54,254 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 22:24:54,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=283, Invalid=1787, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:24:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 22:24:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2021-11-02 22:24:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 105 states have internal predecessors, (110), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:24:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2021-11-02 22:24:54,260 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 53 [2021-11-02 22:24:54,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:54,261 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2021-11-02 22:24:54,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.96) internal successors, (74), 22 states have internal predecessors, (74), 9 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:24:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2021-11-02 22:24:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:24:54,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:54,262 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:54,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:54,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:24:54,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_circular_prependErr11REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:24:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash 822475037, now seen corresponding path program 1 times [2021-11-02 22:24:54,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:54,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212465324] [2021-11-02 22:24:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:54,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:54,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:54,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:24:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:54,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:24:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:54,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:24:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:54,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:24:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:24:55,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:55,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212465324] [2021-11-02 22:24:55,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212465324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:55,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081877113] [2021-11-02 22:24:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:55,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:55,650 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:55,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:24:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:55,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-02 22:24:55,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:56,034 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 [2021-11-02 22:24:56,039 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 [2021-11-02 22:24:56,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-02 22:24:56,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:25:04,409 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-02 22:25:04,409 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 3 case distinctions, treesize of input 96 treesize of output 84 [2021-11-02 22:25:04,426 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 22:25:04,427 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 85 treesize of output 87 [2021-11-02 22:25:04,477 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-02 22:25:04,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 76 [2021-11-02 22:25:04,488 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 22:25:04,488 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 73 treesize of output 73 [2021-11-02 22:25:04,838 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-02 22:25:04,838 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 59 [2021-11-02 22:25:04,849 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-02 22:25:04,849 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2021-11-02 22:25:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:25:04,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081877113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:04,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:04,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 32 [2021-11-02 22:25:04,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463397065] [2021-11-02 22:25:04,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 22:25:04,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 22:25:04,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=960, Unknown=2, NotChecked=0, Total=1056 [2021-11-02 22:25:04,916 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 33 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:25:23,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:23,380 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2021-11-02 22:25:23,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:25:23,380 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 56 [2021-11-02 22:25:23,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:23,381 INFO L225 Difference]: With dead ends: 138 [2021-11-02 22:25:23,381 INFO L226 Difference]: Without dead ends: 138 [2021-11-02 22:25:23,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=187, Invalid=1787, Unknown=6, NotChecked=0, Total=1980 [2021-11-02 22:25:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-02 22:25:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2021-11-02 22:25:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 104 states have internal predecessors, (109), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:25:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-11-02 22:25:23,387 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 56 [2021-11-02 22:25:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:23,388 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-11-02 22:25:23,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:25:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-11-02 22:25:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:25:23,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:23,389 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:23,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:23,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:25:23,603 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_circular_prependErr10REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:25:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash 822475036, now seen corresponding path program 1 times [2021-11-02 22:25:23,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:23,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783875855] [2021-11-02 22:25:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:23,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:23,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:25:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:23,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:25:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:23,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:25:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:23,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:25:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:23,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:25:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:25:24,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:24,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783875855] [2021-11-02 22:25:24,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783875855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:24,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962947144] [2021-11-02 22:25:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:24,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:24,203 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:24,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:25:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 22:25:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:24,772 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 [2021-11-02 22:25:25,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:25:29,409 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-02 22:25:29,409 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 3 case distinctions, treesize of input 53 treesize of output 45 [2021-11-02 22:25:29,426 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-02 22:25:29,426 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 42 treesize of output 50 [2021-11-02 22:25:29,636 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-02 22:25:29,637 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 29 [2021-11-02 22:25:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:25:29,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962947144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:29,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:29,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-11-02 22:25:29,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040685800] [2021-11-02 22:25:29,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:25:29,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:25:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=896, Unknown=2, NotChecked=0, Total=992 [2021-11-02 22:25:29,685 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 32 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:25:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:45,737 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2021-11-02 22:25:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:25:45,742 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 56 [2021-11-02 22:25:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:45,744 INFO L225 Difference]: With dead ends: 137 [2021-11-02 22:25:45,744 INFO L226 Difference]: Without dead ends: 137 [2021-11-02 22:25:45,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=175, Invalid=1545, Unknown=2, NotChecked=0, Total=1722 [2021-11-02 22:25:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-02 22:25:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2021-11-02 22:25:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 103 states have internal predecessors, (108), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:25:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2021-11-02 22:25:45,759 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 56 [2021-11-02 22:25:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:45,759 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2021-11-02 22:25:45,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:25:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2021-11-02 22:25:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:25:45,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:45,760 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:45,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:45,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:25:45,975 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_circular_prependErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:25:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:45,975 INFO L85 PathProgramCache]: Analyzing trace with hash 822464113, now seen corresponding path program 1 times [2021-11-02 22:25:45,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:45,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512310013] [2021-11-02 22:25:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:45,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:25:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:25:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:25:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:25:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:25:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 22:25:46,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:46,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512310013] [2021-11-02 22:25:46,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512310013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:46,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:46,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:46,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918067370] [2021-11-02 22:25:46,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:25:46,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:46,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:25:46,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:25:46,098 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:25:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:46,525 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2021-11-02 22:25:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 56 [2021-11-02 22:25:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:46,526 INFO L225 Difference]: With dead ends: 133 [2021-11-02 22:25:46,526 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 22:25:46,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:25:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 22:25:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2021-11-02 22:25:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 76 states have (on average 1.368421052631579) internal successors, (104), 99 states have internal predecessors, (104), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:25:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-11-02 22:25:46,531 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 56 [2021-11-02 22:25:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:46,531 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-11-02 22:25:46,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:25:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-11-02 22:25:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:25:46,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:46,532 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:46,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:25:46,533 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_circular_prependErr5REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:25:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash 822464114, now seen corresponding path program 1 times [2021-11-02 22:25:46,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:46,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279537362] [2021-11-02 22:25:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:46,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:25:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:25:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:25:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:25:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:25:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 22:25:46,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:46,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279537362] [2021-11-02 22:25:46,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279537362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:46,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:46,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:46,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141892623] [2021-11-02 22:25:46,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:25:46,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:25:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:25:46,703 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:25:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:47,103 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2021-11-02 22:25:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 56 [2021-11-02 22:25:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:47,105 INFO L225 Difference]: With dead ends: 129 [2021-11-02 22:25:47,105 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 22:25:47,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:25:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 22:25:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2021-11-02 22:25:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 95 states have internal predecessors, (100), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:25:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2021-11-02 22:25:47,109 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 56 [2021-11-02 22:25:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:47,109 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2021-11-02 22:25:47,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:25:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2021-11-02 22:25:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:25:47,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:47,111 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:47,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:25:47,111 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_circular_prependErr18REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:25:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1905337857, now seen corresponding path program 1 times [2021-11-02 22:25:47,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:47,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488121958] [2021-11-02 22:25:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:47,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:47,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:25:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:47,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:25:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:47,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:25:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:47,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:25:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:47,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:25:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:25:47,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:47,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488121958] [2021-11-02 22:25:47,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488121958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:47,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:47,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:47,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853065937] [2021-11-02 22:25:47,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:25:47,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:47,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:25:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:25:47,241 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:25:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:47,647 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2021-11-02 22:25:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:25:47,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 62 [2021-11-02 22:25:47,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:47,648 INFO L225 Difference]: With dead ends: 130 [2021-11-02 22:25:47,648 INFO L226 Difference]: Without dead ends: 130 [2021-11-02 22:25:47,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:25:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-02 22:25:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-11-02 22:25:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 94 states have internal predecessors, (99), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:25:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-11-02 22:25:47,653 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 62 [2021-11-02 22:25:47,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:47,654 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-11-02 22:25:47,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:25:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-11-02 22:25:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:25:47,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:47,655 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:47,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:25:47,655 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_circular_prependErr19REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:25:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1905337858, now seen corresponding path program 1 times [2021-11-02 22:25:47,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:47,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087176650] [2021-11-02 22:25:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:47,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:47,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:25:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:47,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:25:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:47,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:25:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:48,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:25:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:48,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:25:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:25:48,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:48,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087176650] [2021-11-02 22:25:48,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087176650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:48,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812700831] [2021-11-02 22:25:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:48,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:48,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:48,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:25:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:25:48,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:48,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-11-02 22:25:48,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-11-02 22:25:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:25:49,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812700831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:49,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:25:49,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [22] total 26 [2021-11-02 22:25:49,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048354064] [2021-11-02 22:25:49,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:25:49,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:25:49,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:25:49,030 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:25:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:49,259 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2021-11-02 22:25:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:25:49,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 62 [2021-11-02 22:25:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:49,263 INFO L225 Difference]: With dead ends: 110 [2021-11-02 22:25:49,263 INFO L226 Difference]: Without dead ends: 110 [2021-11-02 22:25:49,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:25:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-02 22:25:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-11-02 22:25:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 93 states have internal predecessors, (98), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:25:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-11-02 22:25:49,269 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 62 [2021-11-02 22:25:49,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:49,270 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-11-02 22:25:49,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:25:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-11-02 22:25:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:25:49,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:49,271 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:49,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:49,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:49,491 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:25:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:49,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1148051330, now seen corresponding path program 1 times [2021-11-02 22:25:49,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:49,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768958804] [2021-11-02 22:25:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:49,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:49,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:25:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:49,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:25:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:49,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:25:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:49,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:25:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:49,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-02 22:25:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:49,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:25:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:25:50,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:50,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768958804] [2021-11-02 22:25:50,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768958804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:50,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357397992] [2021-11-02 22:25:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:50,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:50,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:50,106 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:50,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:25:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:50,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 22:25:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:50,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-02 22:25:53,094 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (let ((.cse0 (+ node_create_~temp~0.offset 8))) (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) node_create_~temp~0.offset 0) (+ node_create_~temp~0.offset 4) 0) .cse0 (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) .cse0))))))) is different from true [2021-11-02 22:26:04,263 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_1 Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= |c_dll_circular_prepend_#t~mem12.base| (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) node_create_~temp~0.offset 0) (+ node_create_~temp~0.offset 4) 0) (+ node_create_~temp~0.offset 8) v_DerPreprocessor_1)) |c_dll_circular_prepend_#in~head.base|) |c_dll_circular_prepend_#in~head.offset|)))) is different from true [2021-11-02 22:26:06,281 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_1 Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) node_create_~temp~0.offset 0) (+ node_create_~temp~0.offset 4) 0) (+ node_create_~temp~0.offset 8) v_DerPreprocessor_1)) |c_dll_circular_prepend_#in~head.base|) |c_dll_circular_prepend_#in~head.offset|) 0))) is different from true [2021-11-02 22:26:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-02 22:26:06,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357397992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:06,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:06,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2021-11-02 22:26:06,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466936407] [2021-11-02 22:26:06,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:26:06,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:26:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=725, Unknown=8, NotChecked=168, Total=992 [2021-11-02 22:26:06,387 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 32 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:26:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:32,952 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-11-02 22:26:32,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:26:32,953 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 62 [2021-11-02 22:26:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:32,954 INFO L225 Difference]: With dead ends: 129 [2021-11-02 22:26:32,954 INFO L226 Difference]: Without dead ends: 124 [2021-11-02 22:26:32,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=172, Invalid=1549, Unknown=13, NotChecked=246, Total=1980 [2021-11-02 22:26:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-02 22:26:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2021-11-02 22:26:32,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 90 states have internal predecessors, (94), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:26:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-11-02 22:26:32,959 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 62 [2021-11-02 22:26:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:32,959 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-11-02 22:26:32,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:26:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-11-02 22:26:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:26:32,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:32,960 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:26:32,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:33,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 22:26:33,171 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_circular_prependErr20REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:26:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1064068400, now seen corresponding path program 1 times [2021-11-02 22:26:33,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:33,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880012497] [2021-11-02 22:26:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:33,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:33,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:26:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:33,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:26:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:33,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:26:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:33,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:26:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:33,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:26:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:26:34,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:34,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880012497] [2021-11-02 22:26:34,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880012497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:34,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285371433] [2021-11-02 22:26:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:34,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:34,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:34,720 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:34,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:26:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:35,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-02 22:26:35,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:35,249 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 [2021-11-02 22:26:35,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-02 22:26:35,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:26:35,802 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-11-02 22:26:35,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:26:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:26:44,353 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-02 22:26:44,353 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 89 [2021-11-02 22:26:44,396 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-02 22:26:44,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 107 [2021-11-02 22:26:44,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:26:44,426 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-11-02 22:26:44,427 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 2 case distinctions, treesize of input 98 treesize of output 90 [2021-11-02 22:26:44,892 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-02 22:26:44,893 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 83 [2021-11-02 22:26:45,045 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-02 22:26:45,045 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 36 [2021-11-02 22:26:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:26:45,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285371433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:45,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:45,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 41 [2021-11-02 22:26:45,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706614835] [2021-11-02 22:26:45,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:26:45,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:45,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:26:45,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1606, Unknown=2, NotChecked=0, Total=1722 [2021-11-02 22:26:45,341 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 42 states, 35 states have (on average 2.257142857142857) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:27:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:22,886 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-11-02 22:27:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:27:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.257142857142857) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 63 [2021-11-02 22:27:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:22,887 INFO L225 Difference]: With dead ends: 123 [2021-11-02 22:27:22,887 INFO L226 Difference]: Without dead ends: 123 [2021-11-02 22:27:22,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=274, Invalid=3260, Unknown=6, NotChecked=0, Total=3540 [2021-11-02 22:27:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-02 22:27:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-11-02 22:27:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 73 states have (on average 1.273972602739726) internal successors, (93), 89 states have internal predecessors, (93), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:27:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-11-02 22:27:22,892 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 63 [2021-11-02 22:27:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:22,893 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-11-02 22:27:22,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.257142857142857) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:27:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-11-02 22:27:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:27:22,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:22,894 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:22,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:23,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:23,099 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_circular_prependErr21REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:27:23,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1064068399, now seen corresponding path program 1 times [2021-11-02 22:27:23,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:23,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703981461] [2021-11-02 22:27:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:23,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:23,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:23,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:27:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:23,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:27:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:23,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:27:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:24,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-02 22:27:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:27:25,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:25,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703981461] [2021-11-02 22:27:25,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703981461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:25,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738891990] [2021-11-02 22:27:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:25,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:25,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:25,068 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:25,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:27:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:25,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-02 22:27:25,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:25,707 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 [2021-11-02 22:27:26,142 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 42 treesize of output 38 [2021-11-02 22:27:26,146 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 41 treesize of output 37 [2021-11-02 22:27:26,725 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-02 22:27:26,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 54 [2021-11-02 22:27:26,738 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:27:26,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 32 [2021-11-02 22:27:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:35,334 INFO L354 Elim1Store]: treesize reduction 283, result has 9.6 percent of original size [2021-11-02 22:27:35,335 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 4 case distinctions, treesize of input 153 treesize of output 125 [2021-11-02 22:27:35,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:35,380 INFO L354 Elim1Store]: treesize reduction 257, result has 9.8 percent of original size [2021-11-02 22:27:35,381 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 4 case distinctions, treesize of input 142 treesize of output 114 [2021-11-02 22:27:35,393 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-02 22:27:35,393 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 107 treesize of output 109 [2021-11-02 22:27:35,407 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-02 22:27:35,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 108 [2021-11-02 22:27:36,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:36,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:27:36,118 INFO L354 Elim1Store]: treesize reduction 106, result has 2.8 percent of original size [2021-11-02 22:27:36,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 131 treesize of output 84 [2021-11-02 22:27:36,480 INFO L354 Elim1Store]: treesize reduction 106, result has 2.8 percent of original size [2021-11-02 22:27:36,480 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 80 treesize of output 52 [2021-11-02 22:27:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:27:36,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738891990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:36,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:27:36,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 56 [2021-11-02 22:27:36,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939338139] [2021-11-02 22:27:36,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 22:27:36,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 22:27:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3036, Unknown=2, NotChecked=0, Total=3192 [2021-11-02 22:27:36,725 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 57 states, 50 states have (on average 2.02) internal successors, (101), 46 states have internal predecessors, (101), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:28:05,608 WARN L207 SmtUtils]: Spent 8.70 s on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2021-11-02 22:28:39,424 WARN L207 SmtUtils]: Spent 5.54 s on a formula simplification. DAG size of input: 160 DAG size of output: 152 [2021-11-02 22:28:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:48,082 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-11-02 22:28:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:28:48,082 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 50 states have (on average 2.02) internal successors, (101), 46 states have internal predecessors, (101), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 63 [2021-11-02 22:28:48,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:48,083 INFO L225 Difference]: With dead ends: 122 [2021-11-02 22:28:48,083 INFO L226 Difference]: Without dead ends: 122 [2021-11-02 22:28:48,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=377, Invalid=6423, Unknown=6, NotChecked=0, Total=6806 [2021-11-02 22:28:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-02 22:28:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-11-02 22:28:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 88 states have internal predecessors, (92), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:28:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-11-02 22:28:48,089 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 63 [2021-11-02 22:28:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:48,090 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-11-02 22:28:48,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 50 states have (on average 2.02) internal successors, (101), 46 states have internal predecessors, (101), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:28:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-11-02 22:28:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:28:48,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:48,091 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:48,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:48,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:28:48,291 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:28:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:48,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2125093381, now seen corresponding path program 1 times [2021-11-02 22:28:48,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:48,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585818877] [2021-11-02 22:28:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:48,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:48,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:28:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:48,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:28:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:48,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:28:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:48,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:28:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:48,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-02 22:28:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:49,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:28:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:28:49,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:49,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585818877] [2021-11-02 22:28:49,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585818877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:49,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:49,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-02 22:28:49,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733270564] [2021-11-02 22:28:49,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 22:28:49,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:49,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 22:28:49,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=804, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:28:49,976 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 30 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 24 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:28:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:51,849 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2021-11-02 22:28:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:28:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 24 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 69 [2021-11-02 22:28:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:51,851 INFO L225 Difference]: With dead ends: 126 [2021-11-02 22:28:51,851 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 22:28:51,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:28:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 22:28:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 103. [2021-11-02 22:28:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 88 states have internal predecessors, (93), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:28:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-11-02 22:28:51,856 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 69 [2021-11-02 22:28:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:51,856 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-11-02 22:28:51,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 24 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:28:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-11-02 22:28:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:28:51,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:51,858 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:51,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 22:28:51,858 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:28:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:51,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2125093382, now seen corresponding path program 1 times [2021-11-02 22:28:51,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:51,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789232211] [2021-11-02 22:28:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:51,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:52,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:28:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:52,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:28:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:52,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:28:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:28:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:52,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-02 22:28:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:53,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:28:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:28:53,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:53,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789232211] [2021-11-02 22:28:53,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789232211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:53,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:53,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-02 22:28:53,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222761789] [2021-11-02 22:28:53,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 22:28:53,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:53,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 22:28:53,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:28:53,879 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 30 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 24 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:28:55,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:55,664 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-11-02 22:28:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:28:55,664 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 24 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 69 [2021-11-02 22:28:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:55,665 INFO L225 Difference]: With dead ends: 127 [2021-11-02 22:28:55,665 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 22:28:55,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=1514, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:28:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 22:28:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2021-11-02 22:28:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 76 states have (on average 1.25) internal successors, (95), 90 states have internal predecessors, (95), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:28:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-11-02 22:28:55,669 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 69 [2021-11-02 22:28:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:55,669 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-11-02 22:28:55,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 24 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:28:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-11-02 22:28:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:28:55,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:55,670 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:55,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-02 22:28:55,671 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 57 more)] === [2021-11-02 22:28:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:55,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2105275457, now seen corresponding path program 1 times [2021-11-02 22:28:55,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:55,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279747192] [2021-11-02 22:28:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:55,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:55,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:28:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:55,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:28:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:56,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:28:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:56,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-02 22:28:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:56,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-02 22:28:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:59,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:28:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:29:00,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:00,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279747192] [2021-11-02 22:29:00,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279747192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:00,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377094636] [2021-11-02 22:29:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:00,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:00,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:00,151 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:00,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be942863-23fe-43ce-98bc-8af657849b57/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:29:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:00,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-02 22:29:00,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:00,889 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 [2021-11-02 22:29:00,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-02 22:29:01,786 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 34 treesize of output 30 [2021-11-02 22:29:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:02,016 INFO L354 Elim1Store]: treesize reduction 50, result has 29.6 percent of original size [2021-11-02 22:29:02,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 42 [2021-11-02 22:29:02,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:29:02,317 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 40 [2021-11-02 22:29:02,325 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 22:29:02,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2021-11-02 22:29:02,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:29:02,897 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 [2021-11-02 22:29:07,204 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-02 22:29:07,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 221 treesize of output 219 [2021-11-02 22:29:13,985 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 22:29:13,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 323 [2021-11-02 22:29:17,177 INFO L354 Elim1Store]: treesize reduction 75, result has 35.3 percent of original size [2021-11-02 22:29:17,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 724 treesize of output 674 [2021-11-02 22:29:27,361 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-02 22:29:27,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1237 treesize of output 1235 [2021-11-02 22:29:44,094 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-02 22:29:44,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 2978 treesize of output 2962 [2021-11-02 22:34:42,188 WARN L207 SmtUtils]: Spent 3.52 m on a formula simplification. DAG size of input: 1427 DAG size of output: 334 [2021-11-02 22:34:42,190 INFO L354 Elim1Store]: treesize reduction 56797, result has 4.7 percent of original size [2021-11-02 22:34:42,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 9 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 18 new quantified variables, introduced 118 case distinctions, treesize of input 101313 treesize of output 57899 [2021-11-02 22:34:50,026 WARN L207 SmtUtils]: Spent 7.47 s on a formula simplification. DAG size of input: 820 DAG size of output: 224 [2021-11-02 22:34:50,027 INFO L354 Elim1Store]: treesize reduction 16809, result has 8.1 percent of original size [2021-11-02 22:34:50,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 9 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 10 new quantified variables, introduced 72 case distinctions, treesize of input 166285 treesize of output 95021 [2021-11-02 22:34:51,542 INFO L354 Elim1Store]: treesize reduction 82, result has 32.2 percent of original size [2021-11-02 22:34:51,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116675 treesize of output 116681 [2021-11-02 22:34:58,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:58,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:58,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:59,014 INFO L354 Elim1Store]: treesize reduction 109, result has 19.3 percent of original size [2021-11-02 22:34:59,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 162 treesize of output 102 [2021-11-02 22:35:02,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:02,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:02,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:03,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:03,034 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-02 22:35:03,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 55 [2021-11-02 22:35:07,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:35:12,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:12,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:12,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:12,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:12,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:12,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:12,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 55 [2021-11-02 22:35:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:17,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:17,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:17,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:17,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:17,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:17,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:17,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:17,509 INFO L354 Elim1Store]: treesize reduction 129, result has 16.8 percent of original size [2021-11-02 22:35:17,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 162 treesize of output 102 [2021-11-02 22:35:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:22,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:22,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:22,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:22,115 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-11-02 22:35:22,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 55 [2021-11-02 22:35:30,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:30,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:30,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:30,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:30,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:30,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:30,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:30,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:30,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:31,001 INFO L354 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2021-11-02 22:35:31,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 189 treesize of output 91 [2021-11-02 22:35:34,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:34,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:34,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:34,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:34,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:34,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:34,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:34,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:34,238 INFO L354 Elim1Store]: treesize reduction 100, result has 1.0 percent of original size [2021-11-02 22:35:34,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 189 treesize of output 91 [2021-11-02 22:35:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:37,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:37,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:37,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:37,540 INFO L354 Elim1Store]: treesize reduction 434, result has 14.7 percent of original size [2021-11-02 22:35:37,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 9 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 26 case distinctions, treesize of input 214 treesize of output 186 [2021-11-02 22:35:43,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:43,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:43,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:43,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:43,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:43,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:43,640 INFO L354 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2021-11-02 22:35:43,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 164 treesize of output 112 [2021-11-02 22:35:46,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:35:46,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:46,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:46,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:46,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:46,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:46,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:46,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:46,757 INFO L354 Elim1Store]: treesize reduction 280, result has 18.4 percent of original size [2021-11-02 22:35:46,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 189 treesize of output 153 [2021-11-02 22:35:50,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:50,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:50,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:50,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:50,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:50,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:50,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:50,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:50,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:50,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:50,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:50,854 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-02 22:35:50,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 164 treesize of output 1 [2021-11-02 22:35:53,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:53,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:53,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:53,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:53,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:54,021 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-02 22:35:54,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 164 treesize of output 1 [2021-11-02 22:35:56,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:35:56,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:56,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:56,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:56,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:56,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:56,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:35:56,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:35:56,618 INFO L354 Elim1Store]: treesize reduction 180, result has 27.1 percent of original size [2021-11-02 22:35:56,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 189 treesize of output 157 [2021-11-02 22:36:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:00,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:00,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:00,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:00,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:00,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:00,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:00,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:00,772 INFO L354 Elim1Store]: treesize reduction 58, result has 42.6 percent of original size [2021-11-02 22:36:00,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 164 treesize of output 112 [2021-11-02 22:36:04,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:36:04,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:04,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:04,543 INFO L354 Elim1Store]: treesize reduction 200, result has 17.7 percent of original size [2021-11-02 22:36:04,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 189 treesize of output 133 [2021-11-02 22:36:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:09,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 40 [2021-11-02 22:36:11,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 49 [2021-11-02 22:36:14,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:14,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:14,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:14,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:14,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:14,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:14,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:14,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:14,327 INFO L354 Elim1Store]: treesize reduction 196, result has 0.5 percent of original size [2021-11-02 22:36:14,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 152 treesize of output 70 [2021-11-02 22:36:17,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:17,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:17,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:17,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:17,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:17,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:17,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 49 [2021-11-02 22:36:18,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:36:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:21,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:21,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:21,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:21,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:21,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:21,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:21,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:21,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:21,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:21,420 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-11-02 22:36:21,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 152 treesize of output 70 [2021-11-02 22:36:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:24,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:24,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:24,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:24,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:24,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:24,891 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-11-02 22:36:24,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 70 [2021-11-02 22:36:28,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:28,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:28,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:28,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:28,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:28,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:28,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:28,747 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-11-02 22:36:28,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 177 treesize of output 91 [2021-11-02 22:36:37,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:37,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:37,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:37,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:37,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:37,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:37,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:37,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 40 [2021-11-02 22:36:39,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:39,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:39,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:39,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:39,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 49 [2021-11-02 22:36:41,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:41,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:41,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:41,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:41,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:41,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:42,020 INFO L354 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2021-11-02 22:36:42,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 70 [2021-11-02 22:36:44,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:36:46,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:36:48,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:36:52,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:36:56,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:04,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:06,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:08,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:10,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:10,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:10,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:10,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:10,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:10,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:10,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:10,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 49 [2021-11-02 22:37:12,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:14,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:14,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:14,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:14,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:14,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:14,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:14,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:14,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:14,706 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:37:14,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 70 [2021-11-02 22:37:17,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:21,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:29,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:29,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:29,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:30,078 INFO L354 Elim1Store]: treesize reduction 104, result has 51.6 percent of original size [2021-11-02 22:37:30,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 162 [2021-11-02 22:37:30,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:31,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:31,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:31,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:32,020 INFO L354 Elim1Store]: treesize reduction 74, result has 34.5 percent of original size [2021-11-02 22:37:32,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 90 [2021-11-02 22:37:32,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:34,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:34,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:34,359 INFO L354 Elim1Store]: treesize reduction 200, result has 43.7 percent of original size [2021-11-02 22:37:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 157 treesize of output 221 [2021-11-02 22:37:35,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:38,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:38,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:39,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:39,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:39,284 INFO L354 Elim1Store]: treesize reduction 3, result has 97.5 percent of original size [2021-11-02 22:37:39,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 142 treesize of output 173 [2021-11-02 22:37:40,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:40,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:40,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:40,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 43 [2021-11-02 22:37:43,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:44,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:44,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:44,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:44,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:44,269 INFO L354 Elim1Store]: treesize reduction 67, result has 23.0 percent of original size [2021-11-02 22:37:44,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 144 treesize of output 84 [2021-11-02 22:37:45,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:45,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:45,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 49 [2021-11-02 22:37:47,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:47,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:49,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:49,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:49,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:49,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:49,783 INFO L354 Elim1Store]: treesize reduction 101, result has 53.5 percent of original size [2021-11-02 22:37:49,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 144 treesize of output 179 [2021-11-02 22:37:51,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:51,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:51,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:51,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:51,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:51,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 49 [2021-11-02 22:37:53,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:55,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:55,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:55,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:55,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:55,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 43 [2021-11-02 22:37:55,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:56,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:56,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:56,764 INFO L354 Elim1Store]: treesize reduction 46, result has 45.9 percent of original size [2021-11-02 22:37:56,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 108 treesize of output 96 [2021-11-02 22:37:57,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:58,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:37:59,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 49 [2021-11-02 22:37:59,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:38:00,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:38:02,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:38:02,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 55 [2021-11-02 22:38:02,988 WARN L234 Elim1Store]: Array PQE input equivalent to false