./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be --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 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:22:45,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:22:45,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:22:45,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:22:45,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:22:45,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:22:45,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:22:45,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:22:45,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:22:45,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:22:45,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:22:45,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:22:45,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:22:45,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:22:45,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:22:45,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:22:45,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:22:45,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:22:45,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:22:45,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:22:45,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:22:45,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:22:45,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:22:45,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:22:45,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:22:45,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:22:45,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:22:45,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:22:45,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:22:45,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:22:45,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:22:45,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:22:45,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:22:45,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:22:45,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:22:45,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:22:45,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:22:45,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:22:45,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:22:45,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:22:45,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:22:45,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:22:45,811 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:22:45,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:22:45,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:22:45,813 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:22:45,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:22:45,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:22:45,815 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:22:45,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:22:45,815 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:22:45,816 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:22:45,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:22:45,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:22:45,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:22:45,818 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:22:45,818 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:22:45,818 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:22:45,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:22:45,819 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:22:45,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:22:45,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:22:45,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:22:45,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:22:45,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:22:45,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:22:45,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:22:45,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:22:45,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:22:45,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:22:45,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:22:45,824 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_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 [2021-10-21 19:22:46,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:22:46,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:22:46,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:22:46,162 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:22:46,163 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:22:46,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2021-10-21 19:22:46,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/data/5f87f48c5/76ad2409152f4677bb446bf76ec66489/FLAGd46f9f180 [2021-10-21 19:22:46,844 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:22:46,845 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/sv-benchmarks/c/list-simple/dll2c_update_all.i [2021-10-21 19:22:46,861 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/data/5f87f48c5/76ad2409152f4677bb446bf76ec66489/FLAGd46f9f180 [2021-10-21 19:22:47,124 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/data/5f87f48c5/76ad2409152f4677bb446bf76ec66489 [2021-10-21 19:22:47,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:22:47,138 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:22:47,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:22:47,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:22:47,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:22:47,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:47,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4cca89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47, skipping insertion in model container [2021-10-21 19:22:47,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:47,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:22:47,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:22:47,727 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_e51a1958-252c-4a14-8929-4b4352ca703f/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2021-10-21 19:22:47,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:22:47,751 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:22:47,814 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_e51a1958-252c-4a14-8929-4b4352ca703f/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2021-10-21 19:22:47,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:22:47,865 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:22:47,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47 WrapperNode [2021-10-21 19:22:47,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:22:47,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:22:47,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:22:47,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:22:47,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:47,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:47,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:47,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:47,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:47,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:47,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:47,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:22:47,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:22:47,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:22:47,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:22:47,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47" (1/1) ... [2021-10-21 19:22:48,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:22:48,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:48,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:22:48,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:22:48,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:22:48,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:22:48,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:22:48,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:22:48,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:22:48,111 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:22:48,111 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-21 19:22:48,111 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-10-21 19:22:48,111 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2021-10-21 19:22:48,114 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_get_data_at [2021-10-21 19:22:48,115 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_update_at [2021-10-21 19:22:48,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:22:48,115 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:22:48,115 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:22:48,115 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:22:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:22:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:22:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:22:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:22:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:22:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:22:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:22:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:22:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:22:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:22:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:22:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:22:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:22:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:22:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:22:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:22:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:22:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:22:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:22:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:22:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:22:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:22:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:22:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:22:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:22:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:22:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:22:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:22:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:22:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:22:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:22:48,123 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:22:48,123 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:22:48,123 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:22:48,124 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:22:48,124 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:22:48,125 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:22:48,125 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:22:48,125 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:22:48,126 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:22:48,126 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:22:48,126 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:22:48,126 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:22:48,126 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:22:48,127 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:22:48,127 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:22:48,127 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:22:48,127 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:22:48,127 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:22:48,128 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:22:48,128 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:22:48,130 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:22:48,130 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:22:48,131 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:22:48,131 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:22:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:22:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:22:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:22:48,133 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:22:48,133 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:22:48,133 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:22:48,133 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:22:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:22:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:22:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:22:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:22:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:22:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:22:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:22:48,136 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:22:48,136 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:22:48,136 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:22:48,137 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:22:48,137 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:22:48,137 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:22:48,137 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:22:48,137 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:22:48,137 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:22:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:22:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:22:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:22:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:22:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:22:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:22:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:22:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:22:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:22:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:22:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:22:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:22:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:22:48,141 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:22:48,141 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:22:48,141 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:22:48,141 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:22:48,141 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:22:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:22:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:22:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:22:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:22:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:22:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:22:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:22:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:22:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:22:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:22:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:22:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:22:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-21 19:22:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:22:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:22:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:22:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-10-21 19:22:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2021-10-21 19:22:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:22:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:22:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_get_data_at [2021-10-21 19:22:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:22:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_update_at [2021-10-21 19:22:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:22:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:22:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:22:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:22:48,712 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:22:48,952 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:22:48,965 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-21 19:22:48,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:22:48 BoogieIcfgContainer [2021-10-21 19:22:48,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:22:48,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:22:48,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:22:48,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:22:48,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:22:47" (1/3) ... [2021-10-21 19:22:48,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fc9d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:22:48, skipping insertion in model container [2021-10-21 19:22:48,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:22:47" (2/3) ... [2021-10-21 19:22:48,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fc9d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:22:48, skipping insertion in model container [2021-10-21 19:22:48,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:22:48" (3/3) ... [2021-10-21 19:22:48,993 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2021-10-21 19:22:49,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:22:49,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-10-21 19:22:49,096 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:22:49,105 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:22:49,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-10-21 19:22:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 63 states have (on average 1.7936507936507937) internal successors, (113), 97 states have internal predecessors, (113), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:22:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:22:49,186 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:49,187 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:22:49,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:22:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash 128365921, now seen corresponding path program 1 times [2021-10-21 19:22:49,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:49,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716601523] [2021-10-21 19:22:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:49,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:49,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:49,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:49,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716601523] [2021-10-21 19:22:49,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716601523] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:22:49,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:22:49,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:22:49,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406795487] [2021-10-21 19:22:49,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:22:49,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:22:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:22:49,564 INFO L87 Difference]: Start difference. First operand has 114 states, 63 states have (on average 1.7936507936507937) internal successors, (113), 97 states have internal predecessors, (113), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 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) [2021-10-21 19:22:49,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:49,965 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-10-21 19:22:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:22:49,967 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 [2021-10-21 19:22:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:49,981 INFO L225 Difference]: With dead ends: 130 [2021-10-21 19:22:49,981 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:22:49,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:22:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:22:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2021-10-21 19:22:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 90 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) [2021-10-21 19:22:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2021-10-21 19:22:50,038 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 12 [2021-10-21 19:22:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:50,039 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2021-10-21 19:22:50,039 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) [2021-10-21 19:22:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2021-10-21 19:22:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:22:50,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:50,041 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:22:50,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:22:50,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:22:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:50,042 INFO L82 PathProgramCache]: Analyzing trace with hash 128365922, now seen corresponding path program 1 times [2021-10-21 19:22:50,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:50,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251725355] [2021-10-21 19:22:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:50,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:50,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:50,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:50,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251725355] [2021-10-21 19:22:50,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251725355] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:22:50,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:22:50,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:22:50,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395799679] [2021-10-21 19:22:50,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:22:50,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:50,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:22:50,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:22:50,204 INFO L87 Difference]: Start difference. First operand 105 states and 113 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) [2021-10-21 19:22:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:50,593 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-10-21 19:22:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:22:50,594 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 [2021-10-21 19:22:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:50,600 INFO L225 Difference]: With dead ends: 121 [2021-10-21 19:22:50,600 INFO L226 Difference]: Without dead ends: 121 [2021-10-21 19:22:50,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:22:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-21 19:22:50,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-10-21 19:22:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 87 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) [2021-10-21 19:22:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-10-21 19:22:50,631 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 12 [2021-10-21 19:22:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:50,632 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-10-21 19:22:50,632 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) [2021-10-21 19:22:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-10-21 19:22:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:22:50,633 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:50,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:22:50,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:22:50,634 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:22:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1287918133, now seen corresponding path program 1 times [2021-10-21 19:22:50,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:50,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184175463] [2021-10-21 19:22:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:50,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:50,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:50,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:22:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:50,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:50,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184175463] [2021-10-21 19:22:50,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184175463] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:22:50,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:22:50,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:22:50,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189263111] [2021-10-21 19:22:50,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:22:50,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:50,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:22:50,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:22:50,934 INFO L87 Difference]: Start difference. First operand 102 states and 110 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) [2021-10-21 19:22:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:51,547 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-10-21 19:22:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:22:51,548 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 [2021-10-21 19:22:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:51,550 INFO L225 Difference]: With dead ends: 132 [2021-10-21 19:22:51,564 INFO L226 Difference]: Without dead ends: 132 [2021-10-21 19:22:51,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:22:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-21 19:22:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2021-10-21 19:22:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 88 states have internal predecessors, (96), 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) [2021-10-21 19:22:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2021-10-21 19:22:51,578 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 20 [2021-10-21 19:22:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:51,578 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2021-10-21 19:22:51,579 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) [2021-10-21 19:22:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2021-10-21 19:22:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:22:51,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:51,590 INFO L512 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] [2021-10-21 19:22:51,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:22:51,591 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:22:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:51,591 INFO L82 PathProgramCache]: Analyzing trace with hash 60501513, now seen corresponding path program 1 times [2021-10-21 19:22:51,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:51,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822078881] [2021-10-21 19:22:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:51,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:51,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:51,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:22:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:22:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:22:51,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:51,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822078881] [2021-10-21 19:22:51,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822078881] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:22:51,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:22:51,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:22:51,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555629096] [2021-10-21 19:22:51,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:22:51,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:22:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:22:51,863 INFO L87 Difference]: Start difference. First operand 103 states and 111 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) [2021-10-21 19:22:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:52,399 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-10-21 19:22:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:22:52,400 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 [2021-10-21 19:22:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:52,402 INFO L225 Difference]: With dead ends: 122 [2021-10-21 19:22:52,402 INFO L226 Difference]: Without dead ends: 122 [2021-10-21 19:22:52,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:22:52,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-21 19:22:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-10-21 19:22:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 87 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) [2021-10-21 19:22:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-10-21 19:22:52,413 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 30 [2021-10-21 19:22:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:52,413 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-10-21 19:22:52,414 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) [2021-10-21 19:22:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-10-21 19:22:52,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:22:52,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:52,416 INFO L512 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] [2021-10-21 19:22:52,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:22:52,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:22:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 60501514, now seen corresponding path program 1 times [2021-10-21 19:22:52,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:52,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080310261] [2021-10-21 19:22:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:52,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:52,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:52,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:22:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:22:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:22:52,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:52,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080310261] [2021-10-21 19:22:52,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080310261] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:22:52,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:22:52,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:22:52,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994833220] [2021-10-21 19:22:52,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:22:52,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:22:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:22:52,643 INFO L87 Difference]: Start difference. First operand 102 states and 110 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) [2021-10-21 19:22:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:53,167 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2021-10-21 19:22:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:22:53,168 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 [2021-10-21 19:22:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:53,169 INFO L225 Difference]: With dead ends: 121 [2021-10-21 19:22:53,170 INFO L226 Difference]: Without dead ends: 121 [2021-10-21 19:22:53,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:22:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-21 19:22:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-10-21 19:22:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.540983606557377) internal successors, (94), 86 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) [2021-10-21 19:22:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-10-21 19:22:53,180 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 30 [2021-10-21 19:22:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:53,181 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-10-21 19:22:53,181 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) [2021-10-21 19:22:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-10-21 19:22:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:22:53,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:53,183 INFO L512 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] [2021-10-21 19:22:53,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:22:53,184 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:22:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1987588278, now seen corresponding path program 1 times [2021-10-21 19:22:53,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:53,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344033112] [2021-10-21 19:22:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:53,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:53,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:22:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:53,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:22:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:22:53,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:53,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344033112] [2021-10-21 19:22:53,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344033112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:53,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846031479] [2021-10-21 19:22:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:53,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:53,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:53,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:22:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:22:53,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:22:54,204 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:22:54,204 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 [2021-10-21 19:22:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:54,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846031479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:54,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:54,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-10-21 19:22:54,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072695344] [2021-10-21 19:22:54,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:22:54,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:22:54,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:22:54,385 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 10 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) [2021-10-21 19:22:55,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:55,163 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-10-21 19:22:55,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:22:55,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 10 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 [2021-10-21 19:22:55,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:55,165 INFO L225 Difference]: With dead ends: 128 [2021-10-21 19:22:55,165 INFO L226 Difference]: Without dead ends: 128 [2021-10-21 19:22:55,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:22:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-21 19:22:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2021-10-21 19:22:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.5384615384615385) internal successors, (100), 90 states have internal predecessors, (100), 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) [2021-10-21 19:22:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-10-21 19:22:55,174 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 32 [2021-10-21 19:22:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:55,175 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-10-21 19:22:55,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 10 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) [2021-10-21 19:22:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-10-21 19:22:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:22:55,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:55,177 INFO L512 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] [2021-10-21 19:22:55,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-21 19:22:55,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:55,405 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:22:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:55,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1987588277, now seen corresponding path program 1 times [2021-10-21 19:22:55,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:55,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361350843] [2021-10-21 19:22:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:55,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:55,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:55,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:22:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:55,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:22:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:22:55,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:55,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361350843] [2021-10-21 19:22:55,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361350843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:55,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838936952] [2021-10-21 19:22:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:55,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:55,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:55,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:55,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:22:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:55,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:22:55,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:22:56,456 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:22:56,457 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 [2021-10-21 19:22:56,467 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:22:56,468 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 [2021-10-21 19:22:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:56,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838936952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:56,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:56,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-21 19:22:56,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45025038] [2021-10-21 19:22:56,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:22:56,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:56,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:22:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:22:56,603 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:22:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:57,850 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2021-10-21 19:22:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:22:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-10-21 19:22:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:57,853 INFO L225 Difference]: With dead ends: 127 [2021-10-21 19:22:57,853 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 19:22:57,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 558.6ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:22:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 19:22:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2021-10-21 19:22:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.523076923076923) internal successors, (99), 90 states have internal predecessors, (99), 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) [2021-10-21 19:22:57,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-10-21 19:22:57,871 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 32 [2021-10-21 19:22:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:57,872 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-10-21 19:22:57,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:22:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-10-21 19:22:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:22:57,874 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:57,874 INFO L512 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] [2021-10-21 19:22:57,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:22:58,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:22:58,077 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:22:58,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:58,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1188265856, now seen corresponding path program 1 times [2021-10-21 19:22:58,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:58,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892005054] [2021-10-21 19:22:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:58,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:58,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:22:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:22:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:22:58,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:58,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892005054] [2021-10-21 19:22:58,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892005054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:58,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575213713] [2021-10-21 19:22:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:58,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:58,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:58,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:58,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:22:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:58,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:22:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:22:58,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575213713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:58,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:58,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-10-21 19:22:58,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186549700] [2021-10-21 19:22:58,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:22:58,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:22:58,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:22:58,591 INFO L87 Difference]: Start difference. First operand 106 states and 116 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) [2021-10-21 19:22:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:59,046 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-10-21 19:22:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:22:59,047 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 [2021-10-21 19:22:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:59,048 INFO L225 Difference]: With dead ends: 126 [2021-10-21 19:22:59,049 INFO L226 Difference]: Without dead ends: 126 [2021-10-21 19:22:59,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:22:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-21 19:22:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2021-10-21 19:22:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 90 states have internal predecessors, (98), 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) [2021-10-21 19:22:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2021-10-21 19:22:59,055 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 34 [2021-10-21 19:22:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:59,056 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2021-10-21 19:22:59,056 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) [2021-10-21 19:22:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2021-10-21 19:22:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:22:59,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:59,057 INFO L512 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] [2021-10-21 19:22:59,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:22:59,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:59,258 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:22:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:59,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1823244786, now seen corresponding path program 1 times [2021-10-21 19:22:59,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:59,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874177813] [2021-10-21 19:22:59,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:59,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:59,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:59,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:22:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:59,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:22:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:22:59,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:59,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874177813] [2021-10-21 19:22:59,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874177813] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:59,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058865106] [2021-10-21 19:22:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:59,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:59,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:59,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:59,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:22:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:59,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:22:59,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:22:59,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058865106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:59,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:59,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 6 [2021-10-21 19:22:59,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567845045] [2021-10-21 19:22:59,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:22:59,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:59,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:22:59,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:22:59,788 INFO L87 Difference]: Start difference. First operand 106 states and 115 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) [2021-10-21 19:23:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:00,224 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2021-10-21 19:23:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:23:00,225 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 [2021-10-21 19:23:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:00,227 INFO L225 Difference]: With dead ends: 130 [2021-10-21 19:23:00,227 INFO L226 Difference]: Without dead ends: 130 [2021-10-21 19:23:00,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:23:00,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-21 19:23:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-10-21 19:23:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 93 states have internal predecessors, (103), 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) [2021-10-21 19:23:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-10-21 19:23:00,234 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 35 [2021-10-21 19:23:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:00,234 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-10-21 19:23:00,234 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) [2021-10-21 19:23:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-10-21 19:23:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:23:00,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:00,236 INFO L512 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] [2021-10-21 19:23:00,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:23:00,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:00,457 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr5REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:00,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1823244785, now seen corresponding path program 1 times [2021-10-21 19:23:00,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:00,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847803992] [2021-10-21 19:23:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:00,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:00,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:00,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:23:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:00,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:23:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:23:00,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:00,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847803992] [2021-10-21 19:23:00,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847803992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:00,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182539530] [2021-10-21 19:23:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:00,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:00,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:00,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:00,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:23:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:00,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:23:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:23:01,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182539530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:01,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:23:01,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-10-21 19:23:01,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748963796] [2021-10-21 19:23:01,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:23:01,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:23:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:23:01,173 INFO L87 Difference]: Start difference. First operand 109 states and 120 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) [2021-10-21 19:23:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:01,804 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-10-21 19:23:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:23:01,804 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 [2021-10-21 19:23:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:01,806 INFO L225 Difference]: With dead ends: 135 [2021-10-21 19:23:01,806 INFO L226 Difference]: Without dead ends: 135 [2021-10-21 19:23:01,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:23:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-21 19:23:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-10-21 19:23:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.5) internal successors, (102), 93 states have internal predecessors, (102), 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) [2021-10-21 19:23:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-10-21 19:23:01,814 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 35 [2021-10-21 19:23:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:01,815 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-10-21 19:23:01,815 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) [2021-10-21 19:23:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-10-21 19:23:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:23:01,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:01,817 INFO L512 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] [2021-10-21 19:23:01,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-21 19:23:02,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:23:02,033 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_circular_createErr6REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash -686013508, now seen corresponding path program 1 times [2021-10-21 19:23:02,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:02,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793650181] [2021-10-21 19:23:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:02,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:23:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:23:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:23:02,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:02,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793650181] [2021-10-21 19:23:02,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793650181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:23:02,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:23:02,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:23:02,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347889343] [2021-10-21 19:23:02,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:23:02,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:02,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:23:02,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:23:02,187 INFO L87 Difference]: Start difference. First operand 109 states and 119 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) [2021-10-21 19:23:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:02,674 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-10-21 19:23:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:23:02,675 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 [2021-10-21 19:23:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:02,677 INFO L225 Difference]: With dead ends: 128 [2021-10-21 19:23:02,677 INFO L226 Difference]: Without dead ends: 128 [2021-10-21 19:23:02,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:23:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-21 19:23:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2021-10-21 19:23:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 68 states have (on average 1.4852941176470589) internal successors, (101), 92 states have internal predecessors, (101), 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) [2021-10-21 19:23:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-10-21 19:23:02,685 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 36 [2021-10-21 19:23:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:02,686 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-10-21 19:23:02,686 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) [2021-10-21 19:23:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-10-21 19:23:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:23:02,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:02,688 INFO L512 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] [2021-10-21 19:23:02,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:23:02,688 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash -686013507, now seen corresponding path program 1 times [2021-10-21 19:23:02,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:02,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528968401] [2021-10-21 19:23:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:02,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:23:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:23:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:23:02,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:02,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528968401] [2021-10-21 19:23:02,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528968401] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:23:02,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:23:02,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:23:02,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337633459] [2021-10-21 19:23:02,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:23:02,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:23:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:23:02,917 INFO L87 Difference]: Start difference. First operand 108 states and 118 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) [2021-10-21 19:23:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:03,444 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-10-21 19:23:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:23:03,445 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 [2021-10-21 19:23:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:03,447 INFO L225 Difference]: With dead ends: 126 [2021-10-21 19:23:03,447 INFO L226 Difference]: Without dead ends: 126 [2021-10-21 19:23:03,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:23:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-21 19:23:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2021-10-21 19:23:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 91 states have internal predecessors, (100), 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) [2021-10-21 19:23:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-10-21 19:23:03,457 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 36 [2021-10-21 19:23:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:03,458 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-10-21 19:23:03,458 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) [2021-10-21 19:23:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-10-21 19:23:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:23:03,465 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:03,465 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:03,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:23:03,466 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1949112644, now seen corresponding path program 1 times [2021-10-21 19:23:03,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:03,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120405622] [2021-10-21 19:23:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:03,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:03,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:03,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:03,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:23:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:03,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:23:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:23:03,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:03,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120405622] [2021-10-21 19:23:03,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120405622] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:23:03,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:23:03,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-21 19:23:03,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537084008] [2021-10-21 19:23:03,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:23:03,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:03,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:23:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:23:03,903 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:23:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:04,919 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-10-21 19:23:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:23:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-10-21 19:23:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:04,921 INFO L225 Difference]: With dead ends: 134 [2021-10-21 19:23:04,921 INFO L226 Difference]: Without dead ends: 134 [2021-10-21 19:23:04,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:23:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-21 19:23:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2021-10-21 19:23:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 94 states have internal predecessors, (106), 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) [2021-10-21 19:23:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-10-21 19:23:04,928 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 45 [2021-10-21 19:23:04,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:04,929 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-10-21 19:23:04,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:23:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-10-21 19:23:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:23:04,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:04,931 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:04,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:23:04,932 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_circular_update_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:04,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1949112643, now seen corresponding path program 1 times [2021-10-21 19:23:04,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:04,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055648336] [2021-10-21 19:23:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:04,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:05,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:05,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:05,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:23:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:05,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:23:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:23:05,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:05,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055648336] [2021-10-21 19:23:05,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055648336] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:23:05,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:23:05,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-21 19:23:05,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371588519] [2021-10-21 19:23:05,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:23:05,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:23:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:23:05,189 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:23:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:06,018 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2021-10-21 19:23:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:23:06,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-10-21 19:23:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:06,020 INFO L225 Difference]: With dead ends: 133 [2021-10-21 19:23:06,020 INFO L226 Difference]: Without dead ends: 133 [2021-10-21 19:23:06,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:23:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-21 19:23:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2021-10-21 19:23:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 94 states have internal predecessors, (104), 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) [2021-10-21 19:23:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-10-21 19:23:06,026 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 45 [2021-10-21 19:23:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:06,026 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-10-21 19:23:06,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:23:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-10-21 19:23:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:23:06,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:06,028 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:06,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:23:06,029 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_circular_destroyErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:06,029 INFO L82 PathProgramCache]: Analyzing trace with hash 812961645, now seen corresponding path program 1 times [2021-10-21 19:23:06,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:06,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552596269] [2021-10-21 19:23:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:06,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:23:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:23:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:23:06,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:06,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552596269] [2021-10-21 19:23:06,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552596269] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:23:06,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:23:06,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:23:06,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112641090] [2021-10-21 19:23:06,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:23:06,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:06,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:23:06,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:23:06,183 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:23:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:06,522 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2021-10-21 19:23:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:23:06,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-10-21 19:23:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:06,524 INFO L225 Difference]: With dead ends: 139 [2021-10-21 19:23:06,525 INFO L226 Difference]: Without dead ends: 139 [2021-10-21 19:23:06,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:23:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-21 19:23:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2021-10-21 19:23:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 73 states have (on average 1.452054794520548) internal successors, (106), 96 states have internal predecessors, (106), 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) [2021-10-21 19:23:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-10-21 19:23:06,531 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 47 [2021-10-21 19:23:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:06,532 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-10-21 19:23:06,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:23:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-10-21 19:23:06,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:23:06,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:06,533 INFO L512 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] [2021-10-21 19:23:06,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:23:06,534 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:06,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1650408867, now seen corresponding path program 1 times [2021-10-21 19:23:06,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:06,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509312961] [2021-10-21 19:23:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:06,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:23:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-21 19:23:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:23:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 19:23:06,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:06,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509312961] [2021-10-21 19:23:06,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509312961] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:06,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517845607] [2021-10-21 19:23:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:06,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:06,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:06,672 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:06,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:23:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:23:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:23:07,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517845607] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:23:07,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:23:07,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-10-21 19:23:07,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924463466] [2021-10-21 19:23:07,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:23:07,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:23:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:23:07,133 INFO L87 Difference]: Start difference. First operand 112 states and 123 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) [2021-10-21 19:23:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:07,180 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-10-21 19:23:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:23:07,181 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 [2021-10-21 19:23:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:07,182 INFO L225 Difference]: With dead ends: 100 [2021-10-21 19:23:07,182 INFO L226 Difference]: Without dead ends: 100 [2021-10-21 19:23:07,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:23:07,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-21 19:23:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-21 19:23:07,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.393939393939394) internal successors, (92), 85 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) [2021-10-21 19:23:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-10-21 19:23:07,188 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 47 [2021-10-21 19:23:07,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:07,189 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-10-21 19:23:07,189 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) [2021-10-21 19:23:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-10-21 19:23:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-21 19:23:07,190 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:07,190 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:07,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:23:07,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:07,405 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1941428179, now seen corresponding path program 1 times [2021-10-21 19:23:07,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:07,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346685181] [2021-10-21 19:23:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:07,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:07,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:07,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:07,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:23:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:23:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:23:07,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:07,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346685181] [2021-10-21 19:23:07,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346685181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:23:07,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:23:07,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:23:07,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833965871] [2021-10-21 19:23:07,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:23:07,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:07,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:23:07,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:23:07,545 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:23:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:08,003 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2021-10-21 19:23:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:23:08,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-10-21 19:23:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:08,006 INFO L225 Difference]: With dead ends: 132 [2021-10-21 19:23:08,007 INFO L226 Difference]: Without dead ends: 132 [2021-10-21 19:23:08,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:23:08,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-21 19:23:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2021-10-21 19:23:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 90 states have internal predecessors, (96), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:23:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2021-10-21 19:23:08,012 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 48 [2021-10-21 19:23:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:08,014 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2021-10-21 19:23:08,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:23:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2021-10-21 19:23:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:23:08,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:08,016 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:08,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:23:08,016 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_circular_get_data_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1934169815, now seen corresponding path program 1 times [2021-10-21 19:23:08,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:08,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604656342] [2021-10-21 19:23:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:08,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:08,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:08,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:08,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:23:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:08,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:23:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:08,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:23:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:23:08,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:08,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604656342] [2021-10-21 19:23:08,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604656342] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:23:08,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:23:08,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:23:08,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234848061] [2021-10-21 19:23:08,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:23:08,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:08,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:23:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:23:08,326 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:23:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:09,133 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2021-10-21 19:23:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:23:09,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2021-10-21 19:23:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:09,135 INFO L225 Difference]: With dead ends: 133 [2021-10-21 19:23:09,135 INFO L226 Difference]: Without dead ends: 133 [2021-10-21 19:23:09,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:23:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-21 19:23:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2021-10-21 19:23:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 93 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:23:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-10-21 19:23:09,141 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 55 [2021-10-21 19:23:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:09,142 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-10-21 19:23:09,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:23:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-10-21 19:23:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:23:09,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:09,144 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:09,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 19:23:09,144 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1934169816, now seen corresponding path program 1 times [2021-10-21 19:23:09,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:09,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473625418] [2021-10-21 19:23:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:09,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:09,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:09,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:09,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:23:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:09,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:23:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:09,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:23:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:23:09,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:09,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473625418] [2021-10-21 19:23:09,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473625418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:09,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939643956] [2021-10-21 19:23:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:09,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:09,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:09,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:09,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:23:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:23:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:23:09,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939643956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:09,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:23:09,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-10-21 19:23:09,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057359603] [2021-10-21 19:23:09,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:23:09,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:23:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:23:09,908 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 8 states have internal predecessors, (45), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-21 19:23:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:10,263 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2021-10-21 19:23:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:23:10,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 8 states have internal predecessors, (45), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2021-10-21 19:23:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:10,265 INFO L225 Difference]: With dead ends: 137 [2021-10-21 19:23:10,265 INFO L226 Difference]: Without dead ends: 137 [2021-10-21 19:23:10,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:23:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-21 19:23:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2021-10-21 19:23:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.379746835443038) internal successors, (109), 98 states have internal predecessors, (109), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:23:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-10-21 19:23:10,272 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 55 [2021-10-21 19:23:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:10,273 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-10-21 19:23:10,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 8 states have internal predecessors, (45), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-21 19:23:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-10-21 19:23:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:23:10,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:10,275 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:10,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:23:10,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:10,489 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:10,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1596450663, now seen corresponding path program 1 times [2021-10-21 19:23:10,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:10,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662086112] [2021-10-21 19:23:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:10,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:10,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:10,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:11,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:23:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:11,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:23:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:11,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:23:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:23:11,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:11,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662086112] [2021-10-21 19:23:11,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662086112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:11,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300818935] [2021-10-21 19:23:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:11,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:11,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:11,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:11,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:23:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:12,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-21 19:23:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:12,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:23:12,981 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:23:12,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-10-21 19:23:13,021 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:23:13,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:23:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:23:13,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:23:13,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-21 19:23:13,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-21 19:23:13,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-10-21 19:23:13,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-10-21 19:23:13,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:13,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:13,955 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-21 19:23:13,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 104 [2021-10-21 19:23:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:13,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:13,977 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:23:13,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 79 [2021-10-21 19:23:14,781 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-21 19:23:14,781 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 92 treesize of output 55 [2021-10-21 19:23:14,791 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-21 19:23:14,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 27 [2021-10-21 19:23:20,182 INFO L354 Elim1Store]: treesize reduction 168, result has 18.0 percent of original size [2021-10-21 19:23:20,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 128 treesize of output 121 [2021-10-21 19:23:20,232 INFO L354 Elim1Store]: treesize reduction 136, result has 17.6 percent of original size [2021-10-21 19:23:20,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 109 treesize of output 81 [2021-10-21 19:23:20,898 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-21 19:23:20,899 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 106 treesize of output 65 [2021-10-21 19:23:20,917 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-21 19:23:20,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 30 [2021-10-21 19:23:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:23:21,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300818935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:21,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:23:21,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2021-10-21 19:23:21,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354067472] [2021-10-21 19:23:21,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-21 19:23:21,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-21 19:23:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2630, Unknown=1, NotChecked=0, Total=2756 [2021-10-21 19:23:21,161 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 53 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:23:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:43,704 INFO L93 Difference]: Finished difference Result 241 states and 268 transitions. [2021-10-21 19:23:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:23:43,705 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-10-21 19:23:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:43,707 INFO L225 Difference]: With dead ends: 241 [2021-10-21 19:23:43,707 INFO L226 Difference]: Without dead ends: 241 [2021-10-21 19:23:43,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 16853.4ms TimeCoverageRelationStatistics Valid=403, Invalid=5757, Unknown=2, NotChecked=0, Total=6162 [2021-10-21 19:23:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-10-21 19:23:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 131. [2021-10-21 19:23:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.3846153846153846) internal successors, (126), 111 states have internal predecessors, (126), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-10-21 19:23:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2021-10-21 19:23:43,720 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 56 [2021-10-21 19:23:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:43,720 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2021-10-21 19:23:43,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:23:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2021-10-21 19:23:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:23:43,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:43,722 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:43,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:23:43,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:43,933 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_circular_update_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:23:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1596450664, now seen corresponding path program 1 times [2021-10-21 19:23:43,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:43,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144629209] [2021-10-21 19:23:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:43,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:44,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:44,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:23:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:23:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:44,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:23:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:23:44,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:44,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144629209] [2021-10-21 19:23:44,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144629209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:44,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364101502] [2021-10-21 19:23:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:44,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:44,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:44,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:44,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:23:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-21 19:23:45,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:45,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:23:45,562 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:23:45,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:23:45,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:23:45,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-21 19:23:45,964 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-21 19:23:45,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-21 19:23:46,104 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-21 19:23:46,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 41 [2021-10-21 19:23:46,541 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:23:46,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 19 [2021-10-21 19:24:09,375 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-10-21 19:24:09,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 47 [2021-10-21 19:24:09,752 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:24:09,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 22 [2021-10-21 19:24:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:24:09,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364101502] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:24:09,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:24:09,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2021-10-21 19:24:09,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793337258] [2021-10-21 19:24:09,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-21 19:24:09,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:24:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-21 19:24:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2117, Unknown=19, NotChecked=0, Total=2256 [2021-10-21 19:24:09,771 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 48 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 35 states have internal predecessors, (78), 6 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:24:57,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:24:57,413 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2021-10-21 19:24:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-21 19:24:57,419 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 35 states have internal predecessors, (78), 6 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-10-21 19:24:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:24:57,422 INFO L225 Difference]: With dead ends: 206 [2021-10-21 19:24:57,422 INFO L226 Difference]: Without dead ends: 206 [2021-10-21 19:24:57,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 31266.0ms TimeCoverageRelationStatistics Valid=388, Invalid=4705, Unknown=19, NotChecked=0, Total=5112 [2021-10-21 19:24:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-21 19:24:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 145. [2021-10-21 19:24:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 102 states have (on average 1.3725490196078431) internal successors, (140), 123 states have internal predecessors, (140), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2021-10-21 19:24:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2021-10-21 19:24:57,434 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 56 [2021-10-21 19:24:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:24:57,434 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2021-10-21 19:24:57,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 35 states have internal predecessors, (78), 6 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:24:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2021-10-21 19:24:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:24:57,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:24:57,436 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:24:57,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:24:57,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:24:57,641 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:24:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:24:57,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1687196488, now seen corresponding path program 2 times [2021-10-21 19:24:57,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:24:57,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600891583] [2021-10-21 19:24:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:57,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:24:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:57,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:24:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:57,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:24:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:57,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:24:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:57,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:24:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:57,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:24:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:24:57,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:24:57,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600891583] [2021-10-21 19:24:57,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600891583] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:24:57,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425074220] [2021-10-21 19:24:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:24:57,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:24:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:24:57,808 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:24:57,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:24:58,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:24:58,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:24:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:24:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:24:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:24:58,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425074220] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:24:58,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:24:58,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-21 19:24:58,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710243861] [2021-10-21 19:24:58,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:24:58,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:24:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:24:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:24:58,773 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:24:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:24:59,348 INFO L93 Difference]: Finished difference Result 147 states and 161 transitions. [2021-10-21 19:24:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:24:59,352 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2021-10-21 19:24:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:24:59,354 INFO L225 Difference]: With dead ends: 147 [2021-10-21 19:24:59,354 INFO L226 Difference]: Without dead ends: 147 [2021-10-21 19:24:59,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:24:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-21 19:24:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 126. [2021-10-21 19:24:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 106 states have internal predecessors, (117), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-10-21 19:24:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2021-10-21 19:24:59,363 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 59 [2021-10-21 19:24:59,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:24:59,363 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2021-10-21 19:24:59,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:24:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2021-10-21 19:24:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-21 19:24:59,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:24:59,365 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:24:59,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:24:59,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:24:59,589 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:24:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:24:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash -588638996, now seen corresponding path program 2 times [2021-10-21 19:24:59,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:24:59,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336455788] [2021-10-21 19:24:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:59,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:24:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:59,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:24:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:24:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:59,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:24:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:59,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:24:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:59,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:24:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:59,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:24:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:24:59,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:24:59,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336455788] [2021-10-21 19:24:59,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336455788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:24:59,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571423956] [2021-10-21 19:24:59,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:24:59,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:24:59,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:24:59,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:24:59,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:25:00,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:25:00,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:25:00,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:25:00,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:25:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:25:01,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571423956] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:25:01,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:25:01,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 21 [2021-10-21 19:25:01,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121920151] [2021-10-21 19:25:01,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:25:01,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:25:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:25:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:25:01,042 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:25:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:25:01,539 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2021-10-21 19:25:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:25:01,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2021-10-21 19:25:01,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:25:01,542 INFO L225 Difference]: With dead ends: 131 [2021-10-21 19:25:01,542 INFO L226 Difference]: Without dead ends: 131 [2021-10-21 19:25:01,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:25:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-21 19:25:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2021-10-21 19:25:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.303370786516854) internal successors, (116), 106 states have internal predecessors, (116), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-10-21 19:25:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 139 transitions. [2021-10-21 19:25:01,550 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 139 transitions. Word has length 63 [2021-10-21 19:25:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:25:01,551 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 139 transitions. [2021-10-21 19:25:01,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:25:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 139 transitions. [2021-10-21 19:25:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-21 19:25:01,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:25:01,553 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:25:01,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:25:01,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:25:01,773 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_circular_get_data_atErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:25:01,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:25:01,774 INFO L82 PathProgramCache]: Analyzing trace with hash -588638941, now seen corresponding path program 1 times [2021-10-21 19:25:01,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:25:01,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952235687] [2021-10-21 19:25:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:01,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:25:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:01,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:25:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:01,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:25:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:01,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:25:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:01,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:25:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:01,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:25:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:01,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:25:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-21 19:25:01,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:25:01,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952235687] [2021-10-21 19:25:01,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952235687] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:25:01,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:25:01,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:25:01,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949277248] [2021-10-21 19:25:01,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:25:01,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:25:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:25:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:25:01,964 INFO L87 Difference]: Start difference. First operand 126 states and 139 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-21 19:25:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:25:02,430 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2021-10-21 19:25:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:25:02,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 5 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 63 [2021-10-21 19:25:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:25:02,433 INFO L225 Difference]: With dead ends: 153 [2021-10-21 19:25:02,433 INFO L226 Difference]: Without dead ends: 153 [2021-10-21 19:25:02,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:25:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-21 19:25:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 132. [2021-10-21 19:25:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 111 states have internal predecessors, (121), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-10-21 19:25:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2021-10-21 19:25:02,439 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 63 [2021-10-21 19:25:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:25:02,440 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2021-10-21 19:25:02,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-21 19:25:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2021-10-21 19:25:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 19:25:02,443 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:25:02,443 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:25:02,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-21 19:25:02,444 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_circular_update_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:25:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:25:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1201906211, now seen corresponding path program 2 times [2021-10-21 19:25:02,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:25:02,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971728095] [2021-10-21 19:25:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:02,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:25:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:02,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:25:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:02,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:25:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:02,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:25:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:02,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:25:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:02,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:25:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:02,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:25:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:25:02,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:25:02,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971728095] [2021-10-21 19:25:02,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971728095] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:02,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945812816] [2021-10-21 19:25:02,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:25:02,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:25:02,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:25:02,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:25:02,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:25:03,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:25:03,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:25:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:25:03,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:25:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:25:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945812816] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:25:03,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:25:03,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-10-21 19:25:03,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758252936] [2021-10-21 19:25:03,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:25:03,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:25:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:25:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:25:03,537 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:25:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:25:03,584 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2021-10-21 19:25:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:25:03,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 67 [2021-10-21 19:25:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:25:03,587 INFO L225 Difference]: With dead ends: 123 [2021-10-21 19:25:03,588 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 19:25:03,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:25:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 19:25:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 116. [2021-10-21 19:25:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 97 states have internal predecessors, (104), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:25:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2021-10-21 19:25:03,593 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 67 [2021-10-21 19:25:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:25:03,593 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2021-10-21 19:25:03,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:25:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2021-10-21 19:25:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-21 19:25:03,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:25:03,595 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:25:03,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:25:03,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:25:03,809 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:25:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:25:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash 12643276, now seen corresponding path program 1 times [2021-10-21 19:25:03,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:25:03,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838380788] [2021-10-21 19:25:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:03,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:25:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:25:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:25:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:25:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:25:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:25:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:25:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-10-21 19:25:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:25:04,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:25:04,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838380788] [2021-10-21 19:25:04,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838380788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:04,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066387017] [2021-10-21 19:25:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:04,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:25:04,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:25:04,004 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:25:04,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:25:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:04,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:25:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:25:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:25:04,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066387017] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:25:04,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:25:04,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-10-21 19:25:04,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93883317] [2021-10-21 19:25:04,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:25:04,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:25:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:25:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:25:04,996 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:25:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:25:05,064 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-10-21 19:25:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:25:05,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 69 [2021-10-21 19:25:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:25:05,066 INFO L225 Difference]: With dead ends: 121 [2021-10-21 19:25:05,067 INFO L226 Difference]: Without dead ends: 118 [2021-10-21 19:25:05,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:25:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-21 19:25:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2021-10-21 19:25:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 97 states have internal predecessors, (103), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:25:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2021-10-21 19:25:05,082 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 69 [2021-10-21 19:25:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:25:05,082 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2021-10-21 19:25:05,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:25:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2021-10-21 19:25:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-21 19:25:05,086 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:25:05,086 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:25:05,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:25:05,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:25:05,309 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:25:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:25:05,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1401782797, now seen corresponding path program 1 times [2021-10-21 19:25:05,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:25:05,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625684832] [2021-10-21 19:25:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:05,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:25:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:05,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:25:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:05,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:25:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:06,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:25:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:06,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:25:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:06,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:25:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:06,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:25:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:06,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:25:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:25:06,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:25:06,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625684832] [2021-10-21 19:25:06,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625684832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:06,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525545087] [2021-10-21 19:25:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:06,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:25:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:25:06,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:25:06,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:25:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-21 19:25:07,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:25:07,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:25:07,947 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:25:07,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:25:08,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:25:08,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-21 19:25:08,372 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-21 19:25:08,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-21 19:25:08,512 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-21 19:25:08,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 36 [2021-10-21 19:25:09,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:25:09,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:25:09,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:25:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:25:09,394 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-10-21 19:25:09,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 39 [2021-10-21 19:25:10,844 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~data Int) (dll_circular_update_at_~head.offset Int)) (= |c_#memory_int| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_int)| .cse0 (store (select |c_old(#memory_int)| .cse0) (+ dll_circular_update_at_~head.offset 8) dll_circular_update_at_~data))))) is different from true [2021-10-21 19:25:10,887 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:25:10,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 36 [2021-10-21 19:25:10,903 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-21 19:25:10,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-21 19:25:11,643 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:25:11,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 19:25:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-21 19:25:11,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525545087] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:11,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:25:11,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 68 [2021-10-21 19:25:11,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123876636] [2021-10-21 19:25:11,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-10-21 19:25:11,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:25:11,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-10-21 19:25:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4230, Unknown=1, NotChecked=130, Total=4556 [2021-10-21 19:25:11,735 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 68 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 54 states have internal predecessors, (107), 10 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-10-21 19:25:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:25:26,664 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2021-10-21 19:25:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-21 19:25:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 54 states have internal predecessors, (107), 10 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 72 [2021-10-21 19:25:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:25:26,666 INFO L225 Difference]: With dead ends: 140 [2021-10-21 19:25:26,666 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 19:25:26,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 16086.0ms TimeCoverageRelationStatistics Valid=547, Invalid=9346, Unknown=11, NotChecked=196, Total=10100 [2021-10-21 19:25:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 19:25:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-10-21 19:25:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 97 states have internal predecessors, (102), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:25:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2021-10-21 19:25:26,677 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 72 [2021-10-21 19:25:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:25:26,677 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2021-10-21 19:25:26,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 54 states have internal predecessors, (107), 10 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-10-21 19:25:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2021-10-21 19:25:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-21 19:25:26,679 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:25:26,679 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:25:26,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:25:26,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:25:26,889 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting dll_circular_get_data_atErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:25:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:25:26,890 INFO L82 PathProgramCache]: Analyzing trace with hash 813165309, now seen corresponding path program 1 times [2021-10-21 19:25:26,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:25:26,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996263654] [2021-10-21 19:25:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:26,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:25:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:27,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:25:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:27,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:25:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:27,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:25:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:27,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:25:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:27,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:25:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:27,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:25:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:27,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:25:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:25:27,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:25:27,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996263654] [2021-10-21 19:25:27,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996263654] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:25:27,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:25:27,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:25:27,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702346134] [2021-10-21 19:25:27,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:25:27,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:25:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:25:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:25:27,320 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:25:28,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:25:28,300 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-21 19:25:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:25:28,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2021-10-21 19:25:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:25:28,303 INFO L225 Difference]: With dead ends: 139 [2021-10-21 19:25:28,303 INFO L226 Difference]: Without dead ends: 139 [2021-10-21 19:25:28,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:25:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-21 19:25:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2021-10-21 19:25:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 97 states have internal predecessors, (101), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:25:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-10-21 19:25:28,309 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 77 [2021-10-21 19:25:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:25:28,310 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-10-21 19:25:28,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 9 states have internal predecessors, (54), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:25:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-10-21 19:25:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-21 19:25:28,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:25:28,311 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:25:28,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 19:25:28,312 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting dll_circular_get_data_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:25:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:25:28,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1392196614, now seen corresponding path program 1 times [2021-10-21 19:25:28,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:25:28,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415871951] [2021-10-21 19:25:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:28,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:25:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:28,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:25:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:28,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:25:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:25:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:29,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:25:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:29,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:25:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:29,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:25:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:29,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:25:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:25:29,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:25:29,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415871951] [2021-10-21 19:25:29,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415871951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:29,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526700670] [2021-10-21 19:25:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:29,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:25:29,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:25:29,461 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:25:29,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:25:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:30,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-21 19:25:30,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:25:30,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:25:30,425 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:25:30,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:25:30,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:25:30,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-21 19:25:30,755 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-21 19:25:30,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-21 19:25:30,847 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-21 19:25:30,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 36 [2021-10-21 19:25:32,309 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-10-21 19:25:32,365 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-10-21 19:25:32,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 42 [2021-10-21 19:25:34,105 INFO L354 Elim1Store]: treesize reduction 140, result has 18.6 percent of original size [2021-10-21 19:25:34,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 65 [2021-10-21 19:25:34,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-21 19:25:34,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 16 [2021-10-21 19:25:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2021-10-21 19:25:34,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526700670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:34,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:25:34,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 54 [2021-10-21 19:25:34,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947705070] [2021-10-21 19:25:34,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-21 19:25:34,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:25:34,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-21 19:25:34,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2719, Unknown=1, NotChecked=104, Total=2970 [2021-10-21 19:25:34,860 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 55 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 42 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-21 19:25:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:25:44,308 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2021-10-21 19:25:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:25:44,309 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 42 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 80 [2021-10-21 19:25:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:25:44,311 INFO L225 Difference]: With dead ends: 147 [2021-10-21 19:25:44,311 INFO L226 Difference]: Without dead ends: 147 [2021-10-21 19:25:44,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 9657.5ms TimeCoverageRelationStatistics Valid=432, Invalid=5733, Unknown=1, NotChecked=154, Total=6320 [2021-10-21 19:25:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-21 19:25:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2021-10-21 19:25:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 86 states have (on average 1.255813953488372) internal successors, (108), 101 states have internal predecessors, (108), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:25:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2021-10-21 19:25:44,321 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 80 [2021-10-21 19:25:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:25:44,322 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2021-10-21 19:25:44,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 42 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-21 19:25:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2021-10-21 19:25:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-21 19:25:44,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:25:44,324 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:25:44,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:25:44,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:25:44,549 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:25:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:25:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1392196615, now seen corresponding path program 1 times [2021-10-21 19:25:44,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:25:44,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313753954] [2021-10-21 19:25:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:44,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:25:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:44,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:25:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:44,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:25:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:45,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:25:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:45,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:25:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:25:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:45,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:25:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:46,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:25:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:25:46,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:25:46,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313753954] [2021-10-21 19:25:46,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313753954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:46,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327353307] [2021-10-21 19:25:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:46,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:25:46,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:25:46,198 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:25:46,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:25:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-21 19:25:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:25:46,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:25:47,336 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:25:47,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:25:47,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:25:47,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-21 19:25:47,721 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-21 19:25:47,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-21 19:25:47,833 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-21 19:25:47,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 36 [2021-10-21 19:25:49,535 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-10-21 19:25:49,597 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-10-21 19:25:49,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 42 [2021-10-21 19:25:50,156 INFO L354 Elim1Store]: treesize reduction 180, result has 16.7 percent of original size [2021-10-21 19:25:50,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 141 treesize of output 122 [2021-10-21 19:25:50,177 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-21 19:25:50,177 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 94 [2021-10-21 19:25:51,065 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-21 19:25:51,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 38 [2021-10-21 19:25:51,069 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 32 treesize of output 20 [2021-10-21 19:25:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-10-21 19:25:51,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327353307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:51,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:25:51,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-10-21 19:25:51,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527504375] [2021-10-21 19:25:51,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-21 19:25:51,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:25:51,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-21 19:25:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3486, Unknown=1, NotChecked=118, Total=3782 [2021-10-21 19:25:51,228 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 48 states have internal predecessors, (122), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-21 19:26:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:08,319 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2021-10-21 19:26:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 19:26:08,319 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.0) internal successors, (122), 48 states have internal predecessors, (122), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 80 [2021-10-21 19:26:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:08,321 INFO L225 Difference]: With dead ends: 146 [2021-10-21 19:26:08,321 INFO L226 Difference]: Without dead ends: 146 [2021-10-21 19:26:08,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 14270.2ms TimeCoverageRelationStatistics Valid=551, Invalid=7822, Unknown=3, NotChecked=180, Total=8556 [2021-10-21 19:26:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-21 19:26:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2021-10-21 19:26:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 100 states have internal predecessors, (105), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:26:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-10-21 19:26:08,332 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 80 [2021-10-21 19:26:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:08,333 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-10-21 19:26:08,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.0) internal successors, (122), 48 states have internal predecessors, (122), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-21 19:26:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-10-21 19:26:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-21 19:26:08,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:08,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:08,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:08,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:08,557 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:26:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:08,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1374254630, now seen corresponding path program 1 times [2021-10-21 19:26:08,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:08,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42985499] [2021-10-21 19:26:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:08,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:26:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:26:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:26:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:26:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:26:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:26:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:26:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:26:08,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:08,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42985499] [2021-10-21 19:26:08,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42985499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:08,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139886468] [2021-10-21 19:26:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:08,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:08,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:08,753 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:08,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:26:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:09,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:26:09,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:26:09,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139886468] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:09,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:26:09,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-10-21 19:26:09,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801565630] [2021-10-21 19:26:09,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:26:09,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:26:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:26:09,793 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:26:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:09,869 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2021-10-21 19:26:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:26:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 83 [2021-10-21 19:26:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:09,874 INFO L225 Difference]: With dead ends: 123 [2021-10-21 19:26:09,875 INFO L226 Difference]: Without dead ends: 119 [2021-10-21 19:26:09,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:26:09,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-21 19:26:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-10-21 19:26:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 85 states have (on average 1.223529411764706) internal successors, (104), 100 states have internal predecessors, (104), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:26:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-10-21 19:26:09,881 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 83 [2021-10-21 19:26:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:09,882 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-10-21 19:26:09,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:26:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-10-21 19:26:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-21 19:26:09,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:09,884 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:09,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-21 19:26:10,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-21 19:26:10,105 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting dll_circular_get_data_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:26:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1568155867, now seen corresponding path program 2 times [2021-10-21 19:26:10,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:10,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053318684] [2021-10-21 19:26:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:10,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:10,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:26:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:10,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:26:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:10,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:26:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:10,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:26:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:10,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:26:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:10,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:26:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 19:26:10,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:10,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053318684] [2021-10-21 19:26:10,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053318684] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:10,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702808946] [2021-10-21 19:26:10,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:26:10,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:10,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:10,313 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:10,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:26:11,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:26:11,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:26:11,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:26:11,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702808946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:11,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:11,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-21 19:26:11,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51753575] [2021-10-21 19:26:11,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:26:11,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:11,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:26:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:26:11,572 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-21 19:26:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:12,124 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2021-10-21 19:26:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:26:12,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2021-10-21 19:26:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:12,126 INFO L225 Difference]: With dead ends: 129 [2021-10-21 19:26:12,126 INFO L226 Difference]: Without dead ends: 129 [2021-10-21 19:26:12,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:26:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-21 19:26:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2021-10-21 19:26:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 80 states have (on average 1.1625) internal successors, (93), 91 states have internal predecessors, (93), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:26:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-10-21 19:26:12,132 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 83 [2021-10-21 19:26:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:12,133 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-10-21 19:26:12,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-21 19:26:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-10-21 19:26:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:26:12,134 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:12,135 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:12,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:12,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:12,351 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:26:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1923018073, now seen corresponding path program 1 times [2021-10-21 19:26:12,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:12,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080185750] [2021-10-21 19:26:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:12,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:12,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:12,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:26:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:13,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:26:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:13,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:26:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:13,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:26:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:13,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:26:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:14,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:26:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:14,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:26:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:26:14,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:14,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080185750] [2021-10-21 19:26:14,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080185750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:14,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772073080] [2021-10-21 19:26:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:14,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:14,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:14,533 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:14,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:26:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 110 conjunts are in the unsatisfiable core [2021-10-21 19:26:15,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:15,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:26:16,050 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:26:16,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:26:16,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:26:16,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-21 19:26:16,499 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-10-21 19:26:16,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 37 [2021-10-21 19:26:16,666 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-10-21 19:26:16,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 39 [2021-10-21 19:26:18,394 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-10-21 19:26:18,455 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-10-21 19:26:18,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 42 [2021-10-21 19:26:18,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-21 19:26:19,181 INFO L354 Elim1Store]: treesize reduction 180, result has 16.7 percent of original size [2021-10-21 19:26:19,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 117 [2021-10-21 19:26:19,205 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-21 19:26:19,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 93 [2021-10-21 19:26:21,493 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.base_BEFORE_CALL_21 Int) (v_main_~s~0.offset_BEFORE_CALL_21 Int)) (let ((.cse0 (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_21))) (let ((.cse1 (select .cse0 (+ v_main_~s~0.offset_BEFORE_CALL_21 4)))) (and (= (select .cse0 v_main_~s~0.offset_BEFORE_CALL_21) .cse1) (not (= v_main_~s~0.base_BEFORE_CALL_21 .cse1)))))) is different from true [2021-10-21 19:26:23,963 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.base_BEFORE_CALL_22 Int) (v_main_~s~0.offset_BEFORE_CALL_22 Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_22))) (let ((.cse0 (select .cse1 (+ v_main_~s~0.offset_BEFORE_CALL_22 4)))) (and (not (= v_main_~s~0.base_BEFORE_CALL_22 .cse0)) (= (select .cse1 v_main_~s~0.offset_BEFORE_CALL_22) .cse0))))) is different from true [2021-10-21 19:26:38,875 INFO L354 Elim1Store]: treesize reduction 36, result has 53.2 percent of original size [2021-10-21 19:26:38,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 81 treesize of output 81 [2021-10-21 19:26:38,882 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 75 treesize of output 67 [2021-10-21 19:26:38,887 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 67 treesize of output 55 [2021-10-21 19:26:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-10-21 19:26:38,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772073080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:38,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:38,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 75 [2021-10-21 19:26:38,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087162432] [2021-10-21 19:26:38,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-10-21 19:26:38,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:38,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-10-21 19:26:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4928, Unknown=5, NotChecked=426, Total=5550 [2021-10-21 19:26:38,929 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 75 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 61 states have internal predecessors, (131), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-21 19:27:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:20,116 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2021-10-21 19:27:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-21 19:27:20,117 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 61 states have internal predecessors, (131), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2021-10-21 19:27:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:20,118 INFO L225 Difference]: With dead ends: 127 [2021-10-21 19:27:20,118 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 19:27:20,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 60422.1ms TimeCoverageRelationStatistics Valid=525, Invalid=10820, Unknown=9, NotChecked=636, Total=11990 [2021-10-21 19:27:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 19:27:20,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 108. [2021-10-21 19:27:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 89 states have internal predecessors, (91), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:27:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-10-21 19:27:20,126 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 86 [2021-10-21 19:27:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:20,127 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-10-21 19:27:20,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 61 states have internal predecessors, (131), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-21 19:27:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-10-21 19:27:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-21 19:27:20,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:20,129 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:20,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:20,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:27:20,345 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting dll_circular_destroyErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:27:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash -485575403, now seen corresponding path program 1 times [2021-10-21 19:27:20,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:20,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824274228] [2021-10-21 19:27:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:20,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:27:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:20,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:27:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:27:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:20,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:27:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:20,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:27:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:20,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:27:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:20,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:27:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 19:27:20,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:20,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824274228] [2021-10-21 19:27:20,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824274228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:20,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880191326] [2021-10-21 19:27:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:20,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:20,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:20,557 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:20,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:27:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:27:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:21,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:27:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 19:27:22,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880191326] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:22,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:22,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 17 [2021-10-21 19:27:22,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322309815] [2021-10-21 19:27:22,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:27:22,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:27:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:27:22,109 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:27:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:22,482 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-10-21 19:27:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:27:22,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 91 [2021-10-21 19:27:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:22,484 INFO L225 Difference]: With dead ends: 128 [2021-10-21 19:27:22,484 INFO L226 Difference]: Without dead ends: 128 [2021-10-21 19:27:22,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:27:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-21 19:27:22,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2021-10-21 19:27:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 92 states have internal predecessors, (97), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:27:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2021-10-21 19:27:22,490 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 91 [2021-10-21 19:27:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:22,491 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2021-10-21 19:27:22,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:27:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2021-10-21 19:27:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-21 19:27:22,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:22,493 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:22,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-21 19:27:22,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 19:27:22,701 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting dll_circular_destroyErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:27:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:22,702 INFO L82 PathProgramCache]: Analyzing trace with hash -485575402, now seen corresponding path program 1 times [2021-10-21 19:27:22,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:22,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153631825] [2021-10-21 19:27:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:22,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:22,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:22,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:27:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:22,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:27:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:23,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:27:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:23,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:27:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:23,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:27:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:23,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:27:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:23,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:27:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 19:27:23,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:23,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153631825] [2021-10-21 19:27:23,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153631825] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:23,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:23,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:27:23,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557157268] [2021-10-21 19:27:23,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:27:23,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:23,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:27:23,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:27:23,172 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:27:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:24,074 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2021-10-21 19:27:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:27:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 91 [2021-10-21 19:27:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:24,076 INFO L225 Difference]: With dead ends: 122 [2021-10-21 19:27:24,076 INFO L226 Difference]: Without dead ends: 122 [2021-10-21 19:27:24,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:27:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-21 19:27:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-10-21 19:27:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 90 states have internal predecessors, (94), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:27:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2021-10-21 19:27:24,081 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 91 [2021-10-21 19:27:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:24,082 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2021-10-21 19:27:24,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:27:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2021-10-21 19:27:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-21 19:27:24,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:24,084 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:24,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-21 19:27:24,085 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting dll_circular_destroyErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:27:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash -326841515, now seen corresponding path program 1 times [2021-10-21 19:27:24,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:24,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075852462] [2021-10-21 19:27:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:24,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:24,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:24,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:27:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:24,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:27:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:24,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:27:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:24,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:27:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:24,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:27:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:24,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:27:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:24,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:27:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 19:27:24,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:24,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075852462] [2021-10-21 19:27:24,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075852462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:24,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473013264] [2021-10-21 19:27:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:24,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:24,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:24,418 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:24,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:27:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-21 19:27:25,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:26,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-21 19:27:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 19:27:26,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473013264] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:26,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:26,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 24 [2021-10-21 19:27:26,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869870629] [2021-10-21 19:27:26,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:27:26,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:26,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:27:26,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:27:26,035 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 25 states, 24 states have (on average 4.125) internal successors, (99), 18 states have internal predecessors, (99), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-21 19:27:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:27,265 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2021-10-21 19:27:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:27:27,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.125) internal successors, (99), 18 states have internal predecessors, (99), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) Word has length 94 [2021-10-21 19:27:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:27,267 INFO L225 Difference]: With dead ends: 122 [2021-10-21 19:27:27,267 INFO L226 Difference]: Without dead ends: 122 [2021-10-21 19:27:27,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 837.4ms TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:27:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-21 19:27:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-10-21 19:27:27,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.130952380952381) internal successors, (95), 90 states have internal predecessors, (95), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:27:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-21 19:27:27,272 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 94 [2021-10-21 19:27:27,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:27,272 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-21 19:27:27,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.125) internal successors, (99), 18 states have internal predecessors, (99), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-21 19:27:27,273 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-21 19:27:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-21 19:27:27,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:27,275 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:27,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-21 19:27:27,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:27:27,489 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting dll_circular_destroyErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:27:27,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:27,490 INFO L82 PathProgramCache]: Analyzing trace with hash -326841514, now seen corresponding path program 1 times [2021-10-21 19:27:27,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:27,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430781945] [2021-10-21 19:27:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:27,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:27,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:27:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:28,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:27:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:28,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:27:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:28,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:27:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:28,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:27:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:29,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:27:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:29,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:27:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:27:29,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:29,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430781945] [2021-10-21 19:27:29,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430781945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:29,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28891696] [2021-10-21 19:27:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:29,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:29,243 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:29,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:27:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:30,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 119 conjunts are in the unsatisfiable core [2021-10-21 19:27:30,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:30,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:27:30,921 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:27:30,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:27:31,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:27:31,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:27:31,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-21 19:27:31,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-21 19:27:31,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 68 [2021-10-21 19:27:31,564 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 0 case distinctions, treesize of input 62 treesize of output 55 [2021-10-21 19:27:31,792 INFO L354 Elim1Store]: treesize reduction 120, result has 17.8 percent of original size [2021-10-21 19:27:31,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 93 [2021-10-21 19:27:31,834 INFO L354 Elim1Store]: treesize reduction 148, result has 18.7 percent of original size [2021-10-21 19:27:31,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 107 [2021-10-21 19:27:34,688 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= (store |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_dll_circular_update_at_#in~head.base|) .cse0))) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-10-21 19:27:34,826 INFO L354 Elim1Store]: treesize reduction 188, result has 14.2 percent of original size [2021-10-21 19:27:34,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 117 [2021-10-21 19:27:34,888 INFO L354 Elim1Store]: treesize reduction 248, result has 14.8 percent of original size [2021-10-21 19:27:34,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 113 [2021-10-21 19:27:36,506 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.offset)| .cse0 (let ((.cse1 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))))))) is different from true [2021-10-21 19:27:36,553 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-10-21 19:27:36,554 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 156 treesize of output 87 [2021-10-21 19:27:36,609 INFO L354 Elim1Store]: treesize reduction 176, result has 19.6 percent of original size [2021-10-21 19:27:36,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 65 [2021-10-21 19:27:59,029 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 71 treesize of output 63 [2021-10-21 19:27:59,040 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-10-21 19:27:59,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 34 [2021-10-21 19:27:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2021-10-21 19:27:59,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28891696] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:59,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:59,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 71 [2021-10-21 19:27:59,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324301298] [2021-10-21 19:27:59,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-10-21 19:27:59,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:59,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-10-21 19:27:59,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=4621, Unknown=4, NotChecked=274, Total=5112 [2021-10-21 19:27:59,283 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 72 states, 71 states have (on average 2.056338028169014) internal successors, (146), 59 states have internal predecessors, (146), 10 states have call successors, (16), 9 states have call predecessors, (16), 14 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2021-10-21 19:28:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:16,543 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-10-21 19:28:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 19:28:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.056338028169014) internal successors, (146), 59 states have internal predecessors, (146), 10 states have call successors, (16), 9 states have call predecessors, (16), 14 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) Word has length 94 [2021-10-21 19:28:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:16,545 INFO L225 Difference]: With dead ends: 119 [2021-10-21 19:28:16,545 INFO L226 Difference]: Without dead ends: 119 [2021-10-21 19:28:16,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 36695.9ms TimeCoverageRelationStatistics Valid=594, Invalid=9310, Unknown=4, NotChecked=394, Total=10302 [2021-10-21 19:28:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-21 19:28:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-10-21 19:28:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 92 states have internal predecessors, (96), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:28:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-10-21 19:28:16,551 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 94 [2021-10-21 19:28:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:16,552 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-10-21 19:28:16,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.056338028169014) internal successors, (146), 59 states have internal predecessors, (146), 10 states have call successors, (16), 9 states have call predecessors, (16), 14 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2021-10-21 19:28:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-10-21 19:28:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-21 19:28:16,554 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:16,554 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:16,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:16,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:16,775 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:28:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:16,776 INFO L82 PathProgramCache]: Analyzing trace with hash -294350775, now seen corresponding path program 1 times [2021-10-21 19:28:16,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:16,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563212375] [2021-10-21 19:28:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:16,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:16,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:28:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:16,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:28:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:16,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:28:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:16,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:28:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:16,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:28:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:17,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:28:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:17,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:28:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:17,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:28:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:17,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-10-21 19:28:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 19:28:17,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:17,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563212375] [2021-10-21 19:28:17,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563212375] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:17,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:17,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-21 19:28:17,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371637597] [2021-10-21 19:28:17,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:28:17,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:17,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:28:17,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:28:17,073 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-21 19:28:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:17,815 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2021-10-21 19:28:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:28:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2021-10-21 19:28:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:17,817 INFO L225 Difference]: With dead ends: 117 [2021-10-21 19:28:17,817 INFO L226 Difference]: Without dead ends: 115 [2021-10-21 19:28:17,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:28:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-21 19:28:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-10-21 19:28:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 92 states have internal predecessors, (95), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:28:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2021-10-21 19:28:17,823 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 94 [2021-10-21 19:28:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:17,826 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2021-10-21 19:28:17,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-21 19:28:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2021-10-21 19:28:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-21 19:28:17,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:17,827 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:17,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-21 19:28:17,828 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:28:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:17,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1542153700, now seen corresponding path program 1 times [2021-10-21 19:28:17,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:17,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012935870] [2021-10-21 19:28:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:17,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:17,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:28:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:17,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:28:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:18,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:28:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:18,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:28:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:28:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:18,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:28:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:18,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:28:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:18,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:28:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 19:28:18,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:18,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012935870] [2021-10-21 19:28:18,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012935870] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:18,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:18,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:28:18,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518419210] [2021-10-21 19:28:18,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:28:18,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:28:18,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:28:18,173 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 9 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:28:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:19,047 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-10-21 19:28:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:28:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 9 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 95 [2021-10-21 19:28:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:19,049 INFO L225 Difference]: With dead ends: 113 [2021-10-21 19:28:19,049 INFO L226 Difference]: Without dead ends: 113 [2021-10-21 19:28:19,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:28:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-21 19:28:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-10-21 19:28:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 91 states have internal predecessors, (93), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:28:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-10-21 19:28:19,053 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 95 [2021-10-21 19:28:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:19,053 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-10-21 19:28:19,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 9 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:28:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-10-21 19:28:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-21 19:28:19,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:19,055 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:19,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-21 19:28:19,056 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:28:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash -244564319, now seen corresponding path program 1 times [2021-10-21 19:28:19,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:19,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655144058] [2021-10-21 19:28:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:19,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:19,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:28:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:19,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:28:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:19,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:28:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:20,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:28:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:20,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:28:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:20,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:28:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:28:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:20,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:28:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 19:28:20,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:20,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655144058] [2021-10-21 19:28:20,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655144058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:20,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754983095] [2021-10-21 19:28:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:20,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:20,452 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:20,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:28:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-21 19:28:21,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:21,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:28:21,945 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 [2021-10-21 19:28:22,085 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:28:22,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:28:22,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:22,361 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:28:22,361 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2021-10-21 19:28:22,585 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-21 19:28:22,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-21 19:28:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:28:22,700 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-21 19:28:22,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 39 [2021-10-21 19:28:23,190 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:28:23,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 23 [2021-10-21 19:28:24,837 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-10-21 19:28:24,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:28:24,902 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-10-21 19:28:24,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 45 [2021-10-21 19:28:25,004 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:28:25,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 23 [2021-10-21 19:28:26,322 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (= (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.base)| .cse0 (let ((.cse1 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))) |c_#memory_$Pointer$.base|)) is different from true [2021-10-21 19:28:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:28:26,385 INFO L354 Elim1Store]: treesize reduction 130, result has 19.8 percent of original size [2021-10-21 19:28:26,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 63 [2021-10-21 19:28:34,137 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-21 19:28:34,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 20 [2021-10-21 19:28:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-10-21 19:28:34,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754983095] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:34,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:34,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2021-10-21 19:28:34,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714836166] [2021-10-21 19:28:34,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-21 19:28:34,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-21 19:28:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2694, Unknown=2, NotChecked=210, Total=3080 [2021-10-21 19:28:34,242 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 43 states have internal predecessors, (125), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-21 19:28:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:46,215 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-10-21 19:28:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 19:28:46,216 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 43 states have internal predecessors, (125), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 97 [2021-10-21 19:28:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:46,217 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:28:46,217 INFO L226 Difference]: Without dead ends: 114 [2021-10-21 19:28:46,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 19834.0ms TimeCoverageRelationStatistics Valid=476, Invalid=5382, Unknown=2, NotChecked=302, Total=6162 [2021-10-21 19:28:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-21 19:28:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-10-21 19:28:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.0804597701149425) internal successors, (94), 92 states have internal predecessors, (94), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:28:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-10-21 19:28:46,223 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 97 [2021-10-21 19:28:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:46,224 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-10-21 19:28:46,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 43 states have internal predecessors, (125), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-21 19:28:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-10-21 19:28:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:28:46,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:46,226 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:46,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:46,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 19:28:46,429 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting dll_circular_destroyErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:28:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:46,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1550879142, now seen corresponding path program 1 times [2021-10-21 19:28:46,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:46,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837064879] [2021-10-21 19:28:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:46,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:46,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:28:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:46,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:28:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:47,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:28:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:47,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:28:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:47,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:28:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:28:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:48,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:28:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:48,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:28:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:28:48,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:48,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837064879] [2021-10-21 19:28:48,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837064879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:48,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686531389] [2021-10-21 19:28:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:48,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:48,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:48,657 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:48,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:28:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:49,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 118 conjunts are in the unsatisfiable core [2021-10-21 19:28:49,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:50,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:28:50,579 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:28:50,580 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 [2021-10-21 19:28:50,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:28:50,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-21 19:28:51,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-10-21 19:28:51,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:28:51,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:28:51,290 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:28:51,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 49 [2021-10-21 19:28:51,829 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-21 19:28:51,829 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 56 treesize of output 27 [2021-10-21 19:29:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:29:12,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:29:12,092 INFO L354 Elim1Store]: treesize reduction 142, result has 17.9 percent of original size [2021-10-21 19:29:12,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 83 treesize of output 55 [2021-10-21 19:29:12,309 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-21 19:29:12,310 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 56 treesize of output 27 [2021-10-21 19:29:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:29:42,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:29:42,897 INFO L354 Elim1Store]: treesize reduction 146, result has 22.8 percent of original size [2021-10-21 19:29:42,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 130 treesize of output 108 [2021-10-21 19:29:42,912 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-10-21 19:29:42,912 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 111 treesize of output 83 [2021-10-21 19:30:00,037 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-10-21 19:30:06,372 INFO L354 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2021-10-21 19:30:06,373 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 70 treesize of output 49 [2021-10-21 19:30:11,316 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-21 19:30:11,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-10-21 19:30:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 9 refuted. 2 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:30:11,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686531389] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:30:11,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:30:11,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2021-10-21 19:30:11,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119153351] [2021-10-21 19:30:11,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-21 19:30:11,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:30:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-21 19:30:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4995, Unknown=34, NotChecked=0, Total=5256 [2021-10-21 19:30:11,442 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 59 states have internal predecessors, (143), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-21 19:31:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:31:39,766 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-10-21 19:31:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 19:31:39,767 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 59 states have internal predecessors, (143), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 100 [2021-10-21 19:31:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:31:39,767 INFO L225 Difference]: With dead ends: 99 [2021-10-21 19:31:39,767 INFO L226 Difference]: Without dead ends: 99 [2021-10-21 19:31:39,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 108033.0ms TimeCoverageRelationStatistics Valid=616, Invalid=9042, Unknown=44, NotChecked=0, Total=9702 [2021-10-21 19:31:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-21 19:31:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-21 19:31:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.0) internal successors, (80), 80 states have internal predecessors, (80), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:31:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-10-21 19:31:39,773 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 100 [2021-10-21 19:31:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:31:39,773 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-10-21 19:31:39,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 59 states have internal predecessors, (143), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-21 19:31:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-10-21 19:31:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-21 19:31:39,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:31:39,775 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:31:39,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:31:39,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-21 19:31:39,992 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-21 19:31:39,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:31:39,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1760519714, now seen corresponding path program 1 times [2021-10-21 19:31:39,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:31:39,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696786507] [2021-10-21 19:31:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:31:39,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:31:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:40,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:31:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:40,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:31:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:40,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:31:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:40,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:31:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:40,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-21 19:31:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:41,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-10-21 19:31:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:41,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-21 19:31:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:41,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:31:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:41,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-10-21 19:31:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-21 19:31:41,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:31:41,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696786507] [2021-10-21 19:31:41,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696786507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:31:41,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626010209] [2021-10-21 19:31:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:31:41,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:31:41,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:31:41,932 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:31:41,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:31:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:31:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 94 conjunts are in the unsatisfiable core [2021-10-21 19:31:43,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:31:43,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:31:44,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:31:44,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-21 19:31:44,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:31:44,247 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-21 19:31:44,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-21 19:31:44,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:31:44,367 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-21 19:31:44,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 56 [2021-10-21 19:31:44,930 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-21 19:31:44,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 39 [2021-10-21 19:31:44,941 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-10-21 19:31:44,941 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 31 treesize of output 21 [2021-10-21 19:31:59,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:31:59,969 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-10-21 19:31:59,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 62 [2021-10-21 19:32:00,177 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-21 19:32:00,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 39 [2021-10-21 19:32:00,191 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-10-21 19:32:00,192 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 31 treesize of output 21 [2021-10-21 19:32:19,812 INFO L354 Elim1Store]: treesize reduction 122, result has 19.7 percent of original size [2021-10-21 19:32:19,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 78 [2021-10-21 19:32:23,472 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 19:32:23,472 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 54 treesize of output 40 [2021-10-21 19:32:30,599 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 19:32:30,600 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 54 treesize of output 40 [2021-10-21 19:32:37,442 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 19:32:37,442 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 54 treesize of output 40 [2021-10-21 19:32:37,447 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:32:37,447 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 34 treesize of output 26 [2021-10-21 19:32:44,524 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-10-21 19:32:44,525 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 66 [2021-10-21 19:32:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 8 refuted. 2 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-21 19:32:46,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626010209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:32:46,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:32:46,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 65 [2021-10-21 19:32:46,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716833338] [2021-10-21 19:32:46,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-21 19:32:46,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:32:46,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-21 19:32:46,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4075, Unknown=25, NotChecked=0, Total=4290 [2021-10-21 19:32:46,685 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 66 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 55 states have internal predecessors, (147), 9 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-21 19:35:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:16,519 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-10-21 19:35:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-21 19:35:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 55 states have internal predecessors, (147), 9 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) Word has length 106 [2021-10-21 19:35:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:16,520 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:35:16,520 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:35:16,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 132368.3ms TimeCoverageRelationStatistics Valid=525, Invalid=8356, Unknown=49, NotChecked=0, Total=8930 [2021-10-21 19:35:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:35:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:35:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:35:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:35:16,522 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2021-10-21 19:35:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:16,522 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:35:16,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 55 states have internal predecessors, (147), 9 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-21 19:35:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:35:16,522 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:35:16,524 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr0REQUIRES_VIOLATION [2021-10-21 19:35:16,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr1REQUIRES_VIOLATION [2021-10-21 19:35:16,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr2REQUIRES_VIOLATION [2021-10-21 19:35:16,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr3REQUIRES_VIOLATION [2021-10-21 19:35:16,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr4REQUIRES_VIOLATION [2021-10-21 19:35:16,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr5REQUIRES_VIOLATION [2021-10-21 19:35:16,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr6REQUIRES_VIOLATION [2021-10-21 19:35:16,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr7REQUIRES_VIOLATION [2021-10-21 19:35:16,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr0REQUIRES_VIOLATION [2021-10-21 19:35:16,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr1REQUIRES_VIOLATION [2021-10-21 19:35:16,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr2REQUIRES_VIOLATION [2021-10-21 19:35:16,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr3REQUIRES_VIOLATION [2021-10-21 19:35:16,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr0REQUIRES_VIOLATION [2021-10-21 19:35:16,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr1REQUIRES_VIOLATION [2021-10-21 19:35:16,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr2REQUIRES_VIOLATION [2021-10-21 19:35:16,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr3REQUIRES_VIOLATION [2021-10-21 19:35:16,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-21 19:35:16,527 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-21 19:35:16,527 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-21 19:35:16,527 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-21 19:35:16,527 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr4REQUIRES_VIOLATION [2021-10-21 19:35:16,527 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr5REQUIRES_VIOLATION [2021-10-21 19:35:16,527 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:35:16,527 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:35:16,527 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr0REQUIRES_VIOLATION [2021-10-21 19:35:16,528 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr1REQUIRES_VIOLATION [2021-10-21 19:35:16,528 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr2REQUIRES_VIOLATION [2021-10-21 19:35:16,528 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr3REQUIRES_VIOLATION [2021-10-21 19:35:16,528 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:35:16,528 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:35:16,529 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:35:16,529 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:35:16,529 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:35:16,529 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:35:16,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-21 19:35:16,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:16,747 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:35:16,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:35:16 BoogieIcfgContainer [2021-10-21 19:35:16,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:35:16,751 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:35:16,751 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:35:16,751 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:35:16,752 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:22:48" (3/4) ... [2021-10-21 19:35:16,756 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:35:16,764 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 19:35:16,764 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:35:16,765 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-21 19:35:16,765 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_destroy [2021-10-21 19:35:16,765 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 19:35:16,765 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 19:35:16,766 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:35:16,766 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_create [2021-10-21 19:35:16,766 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_update_at [2021-10-21 19:35:16,766 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-21 19:35:16,766 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_get_data_at [2021-10-21 19:35:16,774 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-10-21 19:35:16,775 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-21 19:35:16,775 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 19:35:16,776 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:35:16,820 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:35:16,820 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:35:16,821 INFO L168 Benchmark]: Toolchain (without parser) took 749682.72 ms. Allocated memory was 113.2 MB in the beginning and 205.5 MB in the end (delta: 92.3 MB). Free memory was 83.9 MB in the beginning and 81.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 92.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:35:16,821 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory is still 66.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:35:16,822 INFO L168 Benchmark]: CACSL2BoogieTranslator took 712.75 ms. Allocated memory is still 113.2 MB. Free memory was 83.7 MB in the beginning and 80.0 MB in the end (delta: 3.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:35:16,822 INFO L168 Benchmark]: Boogie Preprocessor took 103.50 ms. Allocated memory is still 113.2 MB. Free memory was 80.0 MB in the beginning and 77.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:35:16,823 INFO L168 Benchmark]: RCFGBuilder took 1010.73 ms. Allocated memory was 113.2 MB in the beginning and 140.5 MB in the end (delta: 27.3 MB). Free memory was 77.0 MB in the beginning and 113.7 MB in the end (delta: -36.7 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:35:16,823 INFO L168 Benchmark]: TraceAbstraction took 747765.91 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 113.7 MB in the beginning and 86.7 MB in the end (delta: 26.9 MB). Peak memory consumption was 91.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:35:16,823 INFO L168 Benchmark]: Witness Printer took 69.60 ms. Allocated memory is still 205.5 MB. Free memory was 86.0 MB in the beginning and 81.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:35:16,825 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory is still 66.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 712.75 ms. Allocated memory is still 113.2 MB. Free memory was 83.7 MB in the beginning and 80.0 MB in the end (delta: 3.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 103.50 ms. Allocated memory is still 113.2 MB. Free memory was 80.0 MB in the beginning and 77.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1010.73 ms. Allocated memory was 113.2 MB in the beginning and 140.5 MB in the end (delta: 27.3 MB). Free memory was 77.0 MB in the beginning and 113.7 MB in the end (delta: -36.7 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 747765.91 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 113.7 MB in the beginning and 86.7 MB in the end (delta: 26.9 MB). Peak memory consumption was 91.2 MB. Max. memory is 16.1 GB. * Witness Printer took 69.60 ms. Allocated memory is still 205.5 MB. Free memory was 86.0 MB in the beginning and 81.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 590]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 590]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 621]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 621]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 624]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 624]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 614]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 614]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 643]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 626]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 124 locations, 34 error locations. Started 1 CEGAR loops. OverallTime: 747652.0ms, OverallIterations: 42, TraceHistogramMax: 3, EmptinessCheckTime: 86.0ms, AutomataDifference: 438747.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2815 SDtfs, 7892 SDslu, 14329 SDs, 0 SdLazy, 49954 SolverSat, 1810 SolverUnsat, 112 SolverUnknown, 0 SolverNotchecked, 227852.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3110 GetRequests, 1709 SyntacticMatches, 50 SemanticMatches, 1351 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 15399 ImplicationChecksByTransitivity, 453225.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=21, InterpolantAutomatonStates: 685, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 330.7ms AutomataMinimizationTime, 42 MinimizatonAttempts, 828 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 635.2ms SsaConstructionTime, 2434.0ms SatisfiabilityAnalysisTime, 283990.1ms InterpolantComputationTime, 4248 NumberOfCodeBlocks, 4221 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 4181 ConstructedInterpolants, 345 QuantifiedInterpolants, 48500 SizeOfPredicates, 293 NumberOfNonLiveVariables, 9085 ConjunctsInSsa, 1170 ConjunctsInUnsatCore, 67 InterpolantComputations, 23 PerfectInterpolantSequences, 1023/1439 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 34 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:35:17,065 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-21 19:35:17,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e51a1958-252c-4a14-8929-4b4352ca703f/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...