./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY --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 c46cc56772f2c3f0b073640343b328fb3b128ed13803ffe5a04f6290fe624494 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:40:22,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:40:22,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:40:22,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:40:22,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:40:22,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:40:22,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:40:22,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:40:22,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:40:22,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:40:22,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:40:22,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:40:22,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:40:22,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:40:22,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:40:22,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:40:22,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:40:22,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:40:22,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:40:22,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:40:22,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:40:22,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:40:22,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:40:22,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:40:22,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:40:22,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:40:22,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:40:22,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:40:22,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:40:22,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:40:22,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:40:22,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:40:22,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:40:22,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:40:22,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:40:22,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:40:22,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:40:22,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:40:22,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:40:22,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:40:22,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:40:22,654 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 08:40:22,709 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:40:22,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:40:22,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:40:22,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:40:22,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:40:22,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:40:22,713 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:40:22,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:40:22,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:40:22,714 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:40:22,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:40:22,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:40:22,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:40:22,715 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:40:22,716 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:40:22,716 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:40:22,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:40:22,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:40:22,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:40:22,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:40:22,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:40:22,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:40:22,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:40:22,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:40:22,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:40:22,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:40:22,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:40:22,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:40:22,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:40:22,720 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_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c46cc56772f2c3f0b073640343b328fb3b128ed13803ffe5a04f6290fe624494 [2021-11-07 08:40:23,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:40:23,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:40:23,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:40:23,131 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:40:23,133 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:40:23,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/list-simple/dll2n_update_all.i [2021-11-07 08:40:23,232 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/data/0f9cad678/b2bdb7d29b874811bc1b148249354810/FLAGb6bc546fc [2021-11-07 08:40:23,979 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:40:23,980 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/sv-benchmarks/c/list-simple/dll2n_update_all.i [2021-11-07 08:40:23,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/data/0f9cad678/b2bdb7d29b874811bc1b148249354810/FLAGb6bc546fc [2021-11-07 08:40:24,194 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/data/0f9cad678/b2bdb7d29b874811bc1b148249354810 [2021-11-07 08:40:24,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:40:24,199 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:40:24,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:40:24,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:40:24,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:40:24,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:24,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4b8836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24, skipping insertion in model container [2021-11-07 08:40:24,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:24,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:40:24,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:40:24,731 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_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/sv-benchmarks/c/list-simple/dll2n_update_all.i[24455,24468] [2021-11-07 08:40:24,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:40:24,746 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:40:24,816 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_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/sv-benchmarks/c/list-simple/dll2n_update_all.i[24455,24468] [2021-11-07 08:40:24,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:40:24,873 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:40:24,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24 WrapperNode [2021-11-07 08:40:24,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:40:24,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:40:24,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:40:24,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:40:24,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:24,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:24,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:24,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:24,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:24,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:25,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:25,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:40:25,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:40:25,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:40:25,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:40:25,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24" (1/1) ... [2021-11-07 08:40:25,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:40:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:25,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:40:25,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:40:25,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 08:40:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:40:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 08:40:25,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 08:40:25,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 08:40:25,157 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-07 08:40:25,157 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-07 08:40:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-11-07 08:40:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2021-11-07 08:40:25,159 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_get_data_at [2021-11-07 08:40:25,160 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_update_at [2021-11-07 08:40:25,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 08:40:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 08:40:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 08:40:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 08:40:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 08:40:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 08:40:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:40:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 08:40:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 08:40:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 08:40:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 08:40:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 08:40:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 08:40:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 08:40:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 08:40:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 08:40:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 08:40:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 08:40:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 08:40:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 08:40:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 08:40:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 08:40:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 08:40:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 08:40:25,166 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 08:40:25,166 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 08:40:25,166 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 08:40:25,166 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 08:40:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 08:40:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 08:40:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 08:40:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 08:40:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 08:40:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 08:40:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 08:40:25,169 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 08:40:25,169 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 08:40:25,170 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 08:40:25,171 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 08:40:25,171 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 08:40:25,171 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 08:40:25,171 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 08:40:25,171 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 08:40:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 08:40:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 08:40:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 08:40:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 08:40:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 08:40:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 08:40:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 08:40:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 08:40:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 08:40:25,175 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 08:40:25,175 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 08:40:25,176 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 08:40:25,177 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 08:40:25,178 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 08:40:25,179 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 08:40:25,179 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 08:40:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 08:40:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 08:40:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 08:40:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 08:40:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-07 08:40:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 08:40:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 08:40:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 08:40:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 08:40:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 08:40:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 08:40:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 08:40:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 08:40:25,184 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 08:40:25,184 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 08:40:25,184 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 08:40:25,184 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 08:40:25,185 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 08:40:25,185 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 08:40:25,185 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 08:40:25,185 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 08:40:25,186 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 08:40:25,186 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 08:40:25,186 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 08:40:25,186 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 08:40:25,186 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 08:40:25,187 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 08:40:25,187 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 08:40:25,187 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 08:40:25,187 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 08:40:25,188 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 08:40:25,188 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 08:40:25,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 08:40:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 08:40:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 08:40:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 08:40:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 08:40:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 08:40:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 08:40:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 08:40:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 08:40:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 08:40:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 08:40:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 08:40:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 08:40:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 08:40:25,193 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 08:40:25,193 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 08:40:25,193 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 08:40:25,193 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 08:40:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 08:40:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 08:40:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-07 08:40:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-07 08:40:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:40:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:40:25,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:40:25,197 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-11-07 08:40:25,201 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2021-11-07 08:40:25,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:40:25,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:40:25,203 INFO L130 BoogieDeclarations]: Found specification of procedure dll_get_data_at [2021-11-07 08:40:25,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:40:25,205 INFO L130 BoogieDeclarations]: Found specification of procedure dll_update_at [2021-11-07 08:40:25,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 08:40:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 08:40:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:40:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:40:25,737 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-07 08:40:26,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:40:26,018 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-07 08:40:26,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:40:26 BoogieIcfgContainer [2021-11-07 08:40:26,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:40:26,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:40:26,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:40:26,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:40:26,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:40:24" (1/3) ... [2021-11-07 08:40:26,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2477c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:40:26, skipping insertion in model container [2021-11-07 08:40:26,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:24" (2/3) ... [2021-11-07 08:40:26,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2477c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:40:26, skipping insertion in model container [2021-11-07 08:40:26,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:40:26" (3/3) ... [2021-11-07 08:40:26,036 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_update_all.i [2021-11-07 08:40:26,049 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:40:26,050 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2021-11-07 08:40:26,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:40:26,111 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:40:26,111 INFO L340 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2021-11-07 08:40:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 72 states have internal predecessors, (87), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-07 08:40:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:40:26,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:26,145 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:26,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_createErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash 322336597, now seen corresponding path program 1 times [2021-11-07 08:40:26,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:26,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138559284] [2021-11-07 08:40:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:26,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:26,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:26,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:26,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138559284] [2021-11-07 08:40:26,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138559284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:26,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:26,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:40:26,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829763358] [2021-11-07 08:40:26,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:40:26,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:26,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:40:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:40:26,590 INFO L87 Difference]: Start difference. First operand has 86 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 72 states have internal predecessors, (87), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:27,070 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2021-11-07 08:40:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:40:27,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-07 08:40:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:27,099 INFO L225 Difference]: With dead ends: 116 [2021-11-07 08:40:27,099 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 08:40:27,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:40:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 08:40:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2021-11-07 08:40:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 80 states have internal predecessors, (90), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-07 08:40:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2021-11-07 08:40:27,167 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 11 [2021-11-07 08:40:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:27,168 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2021-11-07 08:40:27,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2021-11-07 08:40:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:40:27,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:27,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:27,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:40:27,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_createErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:27,171 INFO L85 PathProgramCache]: Analyzing trace with hash 322336598, now seen corresponding path program 1 times [2021-11-07 08:40:27,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:27,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549193781] [2021-11-07 08:40:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:27,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:27,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:27,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:27,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549193781] [2021-11-07 08:40:27,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549193781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:27,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:27,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:40:27,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088256971] [2021-11-07 08:40:27,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:40:27,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:40:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:40:27,380 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:27,791 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2021-11-07 08:40:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:40:27,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-07 08:40:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:27,794 INFO L225 Difference]: With dead ends: 104 [2021-11-07 08:40:27,795 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 08:40:27,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:40:27,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 08:40:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2021-11-07 08:40:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 77 states have internal predecessors, (87), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-07 08:40:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-11-07 08:40:27,812 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 11 [2021-11-07 08:40:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:27,813 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-11-07 08:40:27,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-11-07 08:40:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:40:27,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:27,815 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:27,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:40:27,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_createErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:27,817 INFO L85 PathProgramCache]: Analyzing trace with hash 437363609, now seen corresponding path program 1 times [2021-11-07 08:40:27,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:27,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221109222] [2021-11-07 08:40:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:27,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:27,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:27,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:27,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221109222] [2021-11-07 08:40:27,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221109222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:27,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:27,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:40:27,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853079682] [2021-11-07 08:40:27,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:40:27,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:27,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:40:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:40:27,951 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:28,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:28,304 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2021-11-07 08:40:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:40:28,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-07 08:40:28,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:28,307 INFO L225 Difference]: With dead ends: 110 [2021-11-07 08:40:28,307 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 08:40:28,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:40:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 08:40:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2021-11-07 08:40:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.4375) internal successors, (92), 82 states have internal predecessors, (92), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-07 08:40:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2021-11-07 08:40:28,333 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 15 [2021-11-07 08:40:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:28,334 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2021-11-07 08:40:28,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2021-11-07 08:40:28,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 08:40:28,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:28,336 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:28,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:40:28,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash 473343920, now seen corresponding path program 1 times [2021-11-07 08:40:28,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:28,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913943781] [2021-11-07 08:40:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:28,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:28,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:28,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:28,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:28,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913943781] [2021-11-07 08:40:28,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913943781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:28,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:28,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:40:28,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508180568] [2021-11-07 08:40:28,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:40:28,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:40:28,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:40:28,575 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:40:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:29,018 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-11-07 08:40:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:40:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-07 08:40:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:29,020 INFO L225 Difference]: With dead ends: 97 [2021-11-07 08:40:29,020 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 08:40:29,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:40:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 08:40:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2021-11-07 08:40:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 68 states have internal predecessors, (75), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-07 08:40:29,028 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 18 [2021-11-07 08:40:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:29,029 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-07 08:40:29,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:40:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-07 08:40:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:40:29,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:29,030 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:29,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:40:29,031 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_createErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1821558229, now seen corresponding path program 1 times [2021-11-07 08:40:29,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:29,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741657532] [2021-11-07 08:40:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:29,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:29,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:29,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:29,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741657532] [2021-11-07 08:40:29,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741657532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:29,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717925307] [2021-11-07 08:40:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:29,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:29,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:29,182 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:29,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:40:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:29,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:40:29,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:29,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:40:29,622 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:40:29,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-07 08:40:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:29,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717925307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:29,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:29,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-07 08:40:29,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954412146] [2021-11-07 08:40:29,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:40:29,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:29,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:40:29,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:40:29,900 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:30,205 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-11-07 08:40:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:40:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-07 08:40:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:30,207 INFO L225 Difference]: With dead ends: 97 [2021-11-07 08:40:30,207 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 08:40:30,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:40:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 08:40:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-11-07 08:40:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 67 states have internal predecessors, (74), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-11-07 08:40:30,216 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 22 [2021-11-07 08:40:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:30,216 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-11-07 08:40:30,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-11-07 08:40:30,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:40:30,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:30,218 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:30,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:30,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:30,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_createErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:30,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1821558228, now seen corresponding path program 1 times [2021-11-07 08:40:30,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:30,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753115912] [2021-11-07 08:40:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:30,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:30,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:30,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:30,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753115912] [2021-11-07 08:40:30,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753115912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:30,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219363328] [2021-11-07 08:40:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:30,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:30,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:30,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:30,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:40:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:30,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:40:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:30,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:40:30,975 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 [2021-11-07 08:40:31,141 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:40:31,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-07 08:40:31,153 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:40:31,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-07 08:40:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:31,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219363328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:31,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:31,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2021-11-07 08:40:31,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649891879] [2021-11-07 08:40:31,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:40:31,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:31,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:40:31,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:40:31,355 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:31,681 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-11-07 08:40:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:40:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-07 08:40:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:31,683 INFO L225 Difference]: With dead ends: 96 [2021-11-07 08:40:31,683 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 08:40:31,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:40:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 08:40:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-11-07 08:40:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 66 states have internal predecessors, (73), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-11-07 08:40:31,690 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 22 [2021-11-07 08:40:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:31,695 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-11-07 08:40:31,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:40:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-11-07 08:40:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:40:31,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:31,697 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:31,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:31,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:31,898 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:31,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1519538210, now seen corresponding path program 1 times [2021-11-07 08:40:31,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:31,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241166081] [2021-11-07 08:40:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:31,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:31,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:31,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:32,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:32,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241166081] [2021-11-07 08:40:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241166081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:32,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439722608] [2021-11-07 08:40:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:32,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:32,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:32,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:32,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:40:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:32,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:40:32,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:32,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439722608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:32,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:32,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-11-07 08:40:32,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593578228] [2021-11-07 08:40:32,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:40:32,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:32,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:40:32,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:40:32,353 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:40:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:32,762 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-11-07 08:40:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:40:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-07 08:40:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:32,764 INFO L225 Difference]: With dead ends: 103 [2021-11-07 08:40:32,764 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 08:40:32,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:40:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 08:40:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-11-07 08:40:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 68 states have internal predecessors, (75), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-07 08:40:32,770 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 25 [2021-11-07 08:40:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:32,770 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-07 08:40:32,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:40:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-07 08:40:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:40:32,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:32,773 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:32,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:32,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 08:40:32,995 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:32,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1412675568, now seen corresponding path program 2 times [2021-11-07 08:40:32,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:32,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965575754] [2021-11-07 08:40:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:32,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:33,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:33,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:33,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:33,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965575754] [2021-11-07 08:40:33,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965575754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:33,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512629616] [2021-11-07 08:40:33,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:40:33,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:33,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:33,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:33,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:40:33,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:40:33,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:40:33,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:33,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512629616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:33,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:33,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-11-07 08:40:33,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198441832] [2021-11-07 08:40:33,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:40:33,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:40:33,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:40:33,467 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:40:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:33,731 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-11-07 08:40:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:40:33,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-11-07 08:40:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:33,733 INFO L225 Difference]: With dead ends: 93 [2021-11-07 08:40:33,733 INFO L226 Difference]: Without dead ends: 93 [2021-11-07 08:40:33,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:40:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-07 08:40:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2021-11-07 08:40:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 68 states have internal predecessors, (74), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-11-07 08:40:33,739 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 32 [2021-11-07 08:40:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:33,740 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-11-07 08:40:33,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:40:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-11-07 08:40:33,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:40:33,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:33,742 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:33,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:33,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:33,962 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:33,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:33,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1807265394, now seen corresponding path program 1 times [2021-11-07 08:40:33,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:33,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314240958] [2021-11-07 08:40:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:33,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:34,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:34,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:40:34,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:34,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314240958] [2021-11-07 08:40:34,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314240958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:34,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:34,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 08:40:34,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978001343] [2021-11-07 08:40:34,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:40:34,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:34,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:40:34,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:40:34,148 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:40:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:34,775 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2021-11-07 08:40:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:40:34,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-11-07 08:40:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:34,777 INFO L225 Difference]: With dead ends: 101 [2021-11-07 08:40:34,777 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 08:40:34,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:40:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 08:40:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2021-11-07 08:40:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 71 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-11-07 08:40:34,782 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 33 [2021-11-07 08:40:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:34,783 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-11-07 08:40:34,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:40:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-11-07 08:40:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:40:34,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:34,784 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:34,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:40:34,785 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_update_atErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1807265395, now seen corresponding path program 1 times [2021-11-07 08:40:34,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:34,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807500450] [2021-11-07 08:40:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:34,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:34,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:34,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:40:35,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:35,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807500450] [2021-11-07 08:40:35,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807500450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:35,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:35,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 08:40:35,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50932452] [2021-11-07 08:40:35,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:40:35,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:35,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:40:35,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:40:35,039 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:40:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:35,722 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2021-11-07 08:40:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:40:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-11-07 08:40:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:35,724 INFO L225 Difference]: With dead ends: 99 [2021-11-07 08:40:35,724 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 08:40:35,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:40:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 08:40:35,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-11-07 08:40:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.368421052631579) internal successors, (78), 71 states have internal predecessors, (78), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-11-07 08:40:35,729 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 33 [2021-11-07 08:40:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:35,729 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-11-07 08:40:35,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:40:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-11-07 08:40:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 08:40:35,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:35,731 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:35,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:40:35,732 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_destroyErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:35,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1976563521, now seen corresponding path program 1 times [2021-11-07 08:40:35,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:35,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073399598] [2021-11-07 08:40:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:35,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:35,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:35,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:40:35,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:35,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073399598] [2021-11-07 08:40:35,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073399598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:35,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:35,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:40:35,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126061742] [2021-11-07 08:40:35,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:40:35,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:40:35,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:40:35,842 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:40:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:36,131 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-11-07 08:40:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:40:36,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 4 states have internal predecessors, (23), 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 35 [2021-11-07 08:40:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:36,138 INFO L225 Difference]: With dead ends: 106 [2021-11-07 08:40:36,138 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 08:40:36,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:40:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 08:40:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-11-07 08:40:36,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 73 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-11-07 08:40:36,152 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 35 [2021-11-07 08:40:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:36,153 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-11-07 08:40:36,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:40:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-11-07 08:40:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:40:36,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:36,163 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:36,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:40:36,164 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:36,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1464970113, now seen corresponding path program 1 times [2021-11-07 08:40:36,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:36,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941461909] [2021-11-07 08:40:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:36,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:36,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:36,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:40:36,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:36,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941461909] [2021-11-07 08:40:36,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941461909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:36,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:36,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:40:36,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667800095] [2021-11-07 08:40:36,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:40:36,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:40:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:40:36,280 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:40:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:36,681 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2021-11-07 08:40:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:40:36,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2021-11-07 08:40:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:36,683 INFO L225 Difference]: With dead ends: 111 [2021-11-07 08:40:36,684 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 08:40:36,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:40:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 08:40:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-11-07 08:40:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 78 states have internal predecessors, (84), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-07 08:40:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2021-11-07 08:40:36,689 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 36 [2021-11-07 08:40:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:36,689 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2021-11-07 08:40:36,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 08:40:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2021-11-07 08:40:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 08:40:36,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:36,692 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:36,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:40:36,693 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_get_data_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:36,694 INFO L85 PathProgramCache]: Analyzing trace with hash 414699201, now seen corresponding path program 1 times [2021-11-07 08:40:36,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:36,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507758188] [2021-11-07 08:40:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:36,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:36,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:36,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:36,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:40:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:40:36,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:36,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507758188] [2021-11-07 08:40:36,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507758188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:36,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:36,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 08:40:36,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699996502] [2021-11-07 08:40:36,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:40:36,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:36,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:40:36,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:40:36,931 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:40:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:37,575 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2021-11-07 08:40:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:40:37,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-11-07 08:40:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:37,577 INFO L225 Difference]: With dead ends: 112 [2021-11-07 08:40:37,577 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 08:40:37,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:40:37,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 08:40:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-11-07 08:40:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 81 states have internal predecessors, (90), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-07 08:40:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-11-07 08:40:37,581 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 43 [2021-11-07 08:40:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:37,582 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-11-07 08:40:37,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:40:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-11-07 08:40:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 08:40:37,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:37,583 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:37,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:40:37,583 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_get_data_atErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash 414699202, now seen corresponding path program 1 times [2021-11-07 08:40:37,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:37,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255373869] [2021-11-07 08:40:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:37,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:37,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:37,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:37,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:40:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:40:37,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:37,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255373869] [2021-11-07 08:40:37,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255373869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:37,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972717512] [2021-11-07 08:40:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:37,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:37,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:37,750 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:37,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:40:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:40:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:40:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972717512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:38,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:38,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-11-07 08:40:38,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054313218] [2021-11-07 08:40:38,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:40:38,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:40:38,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:40:38,232 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:38,620 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-11-07 08:40:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:40:38,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 43 [2021-11-07 08:40:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:38,622 INFO L225 Difference]: With dead ends: 116 [2021-11-07 08:40:38,622 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 08:40:38,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:40:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 08:40:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2021-11-07 08:40:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 86 states have internal predecessors, (97), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:40:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2021-11-07 08:40:38,630 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 43 [2021-11-07 08:40:38,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:38,632 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2021-11-07 08:40:38,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:40:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2021-11-07 08:40:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:40:38,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:38,635 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:40:38,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:38,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:38,854 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:38,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:38,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1600479691, now seen corresponding path program 1 times [2021-11-07 08:40:38,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:38,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552355760] [2021-11-07 08:40:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:38,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:39,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:39,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:39,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:40:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:40:39,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:39,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552355760] [2021-11-07 08:40:39,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552355760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:39,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414821262] [2021-11-07 08:40:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:39,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:39,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:39,421 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:39,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:40:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 08:40:39,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:39,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:40:39,795 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:40:39,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:40:39,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:40:39,915 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:40:39,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:40:40,049 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 08:40:40,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 43 [2021-11-07 08:40:40,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-07 08:40:40,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:40:40,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 08:40:40,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255793993] [2021-11-07 08:40:40,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:40:40,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:40:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:40:40,137 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:40:42,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:42,164 INFO L93 Difference]: Finished difference Result 165 states and 187 transitions. [2021-11-07 08:40:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:40:42,169 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-11-07 08:40:42,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:42,170 INFO L225 Difference]: With dead ends: 165 [2021-11-07 08:40:42,171 INFO L226 Difference]: Without dead ends: 165 [2021-11-07 08:40:42,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:40:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-07 08:40:42,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 116. [2021-11-07 08:40:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 99 states have internal predecessors, (114), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-07 08:40:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2021-11-07 08:40:42,201 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 44 [2021-11-07 08:40:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:42,202 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2021-11-07 08:40:42,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:40:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2021-11-07 08:40:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:40:42,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:42,204 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:40:42,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:42,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:40:42,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_update_atErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:40:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1600479692, now seen corresponding path program 1 times [2021-11-07 08:40:42,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:42,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440568931] [2021-11-07 08:40:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:42,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:42,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:40:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:42,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:40:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:43,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:40:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:40:43,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:43,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440568931] [2021-11-07 08:40:43,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440568931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:43,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091387107] [2021-11-07 08:40:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:43,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:43,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:43,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:43,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:40:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:43,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 08:40:43,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:43,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:40:43,672 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:40:43,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:40:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:40:43,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:40:43,830 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:40:43,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:40:43,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:40:43,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:40:43,992 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-07 08:40:43,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 94 [2021-11-07 08:40:44,023 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-07 08:40:44,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 90 [2021-11-07 08:40:44,708 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-07 08:40:44,709 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 99 treesize of output 60 [2021-11-07 08:40:44,721 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-07 08:40:44,721 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 26 [2021-11-07 08:41:13,897 INFO L354 Elim1Store]: treesize reduction 160, result has 17.5 percent of original size [2021-11-07 08:41:13,898 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 132 treesize of output 111 [2021-11-07 08:41:14,000 INFO L354 Elim1Store]: treesize reduction 150, result has 17.6 percent of original size [2021-11-07 08:41:14,001 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 117 treesize of output 96 [2021-11-07 08:41:15,062 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-07 08:41:15,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 72 [2021-11-07 08:41:15,080 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-07 08:41:15,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 29 [2021-11-07 08:41:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:41:15,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091387107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:15,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:15,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-11-07 08:41:15,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441959465] [2021-11-07 08:41:15,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 08:41:15,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 08:41:15,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1302, Unknown=11, NotChecked=0, Total=1406 [2021-11-07 08:41:15,490 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 30 states have internal predecessors, (68), 3 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:05,764 INFO L93 Difference]: Finished difference Result 223 states and 253 transitions. [2021-11-07 08:42:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:42:05,765 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 30 states have internal predecessors, (68), 3 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2021-11-07 08:42:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:05,768 INFO L225 Difference]: With dead ends: 223 [2021-11-07 08:42:05,768 INFO L226 Difference]: Without dead ends: 223 [2021-11-07 08:42:05,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 46.3s TimeCoverageRelationStatistics Valid=411, Invalid=3608, Unknown=13, NotChecked=0, Total=4032 [2021-11-07 08:42:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-07 08:42:05,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 130. [2021-11-07 08:42:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 111 states have internal predecessors, (128), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-07 08:42:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2021-11-07 08:42:05,779 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 44 [2021-11-07 08:42:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:05,780 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2021-11-07 08:42:05,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 30 states have internal predecessors, (68), 3 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2021-11-07 08:42:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:42:05,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:05,782 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:05,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:06,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:42:06,000 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:06,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:06,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1460221574, now seen corresponding path program 2 times [2021-11-07 08:42:06,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:06,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520544462] [2021-11-07 08:42:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:06,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:06,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:06,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:06,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:42:06,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:06,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520544462] [2021-11-07 08:42:06,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520544462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:06,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217721704] [2021-11-07 08:42:06,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:42:06,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:06,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:06,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:42:06,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:42:06,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:06,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:42:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 08:42:07,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217721704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:07,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:07,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-11-07 08:42:07,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820605639] [2021-11-07 08:42:07,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:42:07,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:42:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:42:07,144 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:08,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:08,865 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2021-11-07 08:42:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:42:08,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2021-11-07 08:42:08,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:08,868 INFO L225 Difference]: With dead ends: 126 [2021-11-07 08:42:08,868 INFO L226 Difference]: Without dead ends: 126 [2021-11-07 08:42:08,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:42:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-07 08:42:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2021-11-07 08:42:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 94 states have internal predecessors, (105), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-07 08:42:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2021-11-07 08:42:08,877 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 47 [2021-11-07 08:42:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:08,878 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2021-11-07 08:42:08,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2021-11-07 08:42:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 08:42:08,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:08,880 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:08,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 08:42:09,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:42:09,094 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_get_data_atErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:09,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash -62819338, now seen corresponding path program 2 times [2021-11-07 08:42:09,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:09,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226811242] [2021-11-07 08:42:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:09,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:09,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:09,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:09,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:09,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 08:42:09,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:09,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226811242] [2021-11-07 08:42:09,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226811242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:09,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798140322] [2021-11-07 08:42:09,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:42:09,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:09,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:09,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:09,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:42:09,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:42:09,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:09,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:42:09,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 08:42:10,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798140322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:10,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:42:10,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-11-07 08:42:10,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162543308] [2021-11-07 08:42:10,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:42:10,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:42:10,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:42:10,210 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:42:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:10,424 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-11-07 08:42:10,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:42:10,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (6), 2 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 51 [2021-11-07 08:42:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:10,426 INFO L225 Difference]: With dead ends: 111 [2021-11-07 08:42:10,426 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 08:42:10,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:42:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 08:42:10,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-11-07 08:42:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 76 states have (on average 1.263157894736842) internal successors, (96), 87 states have internal predecessors, (96), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-07 08:42:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2021-11-07 08:42:10,433 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 51 [2021-11-07 08:42:10,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:10,434 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2021-11-07 08:42:10,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:42:10,435 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2021-11-07 08:42:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 08:42:10,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:10,436 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:10,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-07 08:42:10,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:42:10,662 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_get_data_atErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash 300082907, now seen corresponding path program 1 times [2021-11-07 08:42:10,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:10,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433883297] [2021-11-07 08:42:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:10,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:10,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:11,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:11,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:11,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 08:42:11,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:11,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433883297] [2021-11-07 08:42:11,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433883297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:11,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:42:11,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 08:42:11,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948321523] [2021-11-07 08:42:11,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:42:11,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:42:11,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:42:11,383 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:42:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:13,311 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2021-11-07 08:42:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:42:13,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2021-11-07 08:42:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:13,313 INFO L225 Difference]: With dead ends: 120 [2021-11-07 08:42:13,313 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 08:42:13,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:42:13,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 08:42:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2021-11-07 08:42:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 76 states have (on average 1.236842105263158) internal successors, (94), 87 states have internal predecessors, (94), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-07 08:42:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2021-11-07 08:42:13,321 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 54 [2021-11-07 08:42:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:13,321 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2021-11-07 08:42:13,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:42:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2021-11-07 08:42:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:42:13,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:13,323 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-07 08:42:13,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:42:13,323 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_update_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1952625454, now seen corresponding path program 3 times [2021-11-07 08:42:13,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:13,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158695829] [2021-11-07 08:42:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:13,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:13,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:13,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:13,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:13,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 08:42:13,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:13,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158695829] [2021-11-07 08:42:13,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158695829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:13,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047665904] [2021-11-07 08:42:13,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:42:13,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:13,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:13,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:42:14,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:42:14,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:42:14,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 08:42:14,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047665904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:14,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:14,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-07 08:42:14,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274296852] [2021-11-07 08:42:14,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:42:14,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:14,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:42:14,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:42:14,743 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-07 08:42:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:16,566 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2021-11-07 08:42:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:42:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2021-11-07 08:42:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:16,568 INFO L225 Difference]: With dead ends: 110 [2021-11-07 08:42:16,568 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 08:42:16,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:42:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 08:42:16,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2021-11-07 08:42:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 80 states have internal predecessors, (85), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:42:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-11-07 08:42:16,574 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 55 [2021-11-07 08:42:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:16,575 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-11-07 08:42:16,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-07 08:42:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-11-07 08:42:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:42:16,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:16,577 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:16,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-07 08:42:16,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:16,794 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_get_data_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1944568846, now seen corresponding path program 1 times [2021-11-07 08:42:16,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:16,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384364510] [2021-11-07 08:42:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:16,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:16,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:17,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:17,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:42:17,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:17,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384364510] [2021-11-07 08:42:17,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384364510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:17,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:42:17,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:42:17,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226334881] [2021-11-07 08:42:17,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:42:17,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:42:17,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:42:17,129 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:42:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:18,114 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-11-07 08:42:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:42:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2021-11-07 08:42:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:18,116 INFO L225 Difference]: With dead ends: 116 [2021-11-07 08:42:18,116 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 08:42:18,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:42:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 08:42:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2021-11-07 08:42:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2) internal successors, (90), 85 states have internal predecessors, (90), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:42:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-11-07 08:42:18,122 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 57 [2021-11-07 08:42:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:18,123 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-11-07 08:42:18,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:42:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-11-07 08:42:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:42:18,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:18,124 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:18,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:42:18,125 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:18,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1218737794, now seen corresponding path program 1 times [2021-11-07 08:42:18,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:18,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73279706] [2021-11-07 08:42:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:18,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:18,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:19,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:19,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:20,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:20,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:42:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:42:21,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:21,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73279706] [2021-11-07 08:42:21,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73279706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:21,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082712607] [2021-11-07 08:42:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:21,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:21,146 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:21,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:42:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:21,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 08:42:21,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:21,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:42:21,732 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:42:21,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:42:21,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:42:21,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-07 08:42:21,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:42:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:42:21,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-11-07 08:42:22,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:42:22,177 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-07 08:42:22,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 38 [2021-11-07 08:42:22,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-07 08:42:22,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:42:22,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-07 08:42:22,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856199604] [2021-11-07 08:42:22,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 08:42:22,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 08:42:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=974, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:42:22,375 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 30 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 08:42:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:29,473 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2021-11-07 08:42:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:42:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 60 [2021-11-07 08:42:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:29,478 INFO L225 Difference]: With dead ends: 125 [2021-11-07 08:42:29,479 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 08:42:29,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:42:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 08:42:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 101. [2021-11-07 08:42:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 85 states have internal predecessors, (89), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:42:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2021-11-07 08:42:29,486 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 60 [2021-11-07 08:42:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:29,487 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2021-11-07 08:42:29,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 08:42:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2021-11-07 08:42:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:42:29,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:29,489 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:29,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:29,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:29,706 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_get_data_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash -357197356, now seen corresponding path program 1 times [2021-11-07 08:42:29,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:29,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398709935] [2021-11-07 08:42:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:29,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:30,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:30,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:31,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:31,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:42:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:42:32,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:32,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398709935] [2021-11-07 08:42:32,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398709935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:32,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29047233] [2021-11-07 08:42:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:32,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:32,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:32,053 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:32,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:42:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 08:42:32,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:32,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:42:32,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:42:32,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:42:32,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:42:32,918 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:42:32,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:42:33,223 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 08:42:33,223 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 45 treesize of output 38 [2021-11-07 08:42:33,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-07 08:42:33,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:42:33,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 08:42:33,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600174372] [2021-11-07 08:42:33,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:42:33,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:33,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:42:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:42:33,381 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:39,805 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2021-11-07 08:42:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:42:39,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 68 [2021-11-07 08:42:39,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:39,807 INFO L225 Difference]: With dead ends: 133 [2021-11-07 08:42:39,808 INFO L226 Difference]: Without dead ends: 133 [2021-11-07 08:42:39,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=241, Invalid=2015, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:42:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-07 08:42:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2021-11-07 08:42:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 89 states have internal predecessors, (96), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:42:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2021-11-07 08:42:39,814 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 68 [2021-11-07 08:42:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:39,815 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2021-11-07 08:42:39,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2021-11-07 08:42:39,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:42:39,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:39,817 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:39,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:40,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:42:40,030 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_get_data_atErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash -357197355, now seen corresponding path program 1 times [2021-11-07 08:42:40,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:40,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034265970] [2021-11-07 08:42:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:40,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:40,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:40,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:42,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:43,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:42:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:42:43,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:43,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034265970] [2021-11-07 08:42:43,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034265970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:43,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703715866] [2021-11-07 08:42:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:43,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:43,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:43,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:42:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-07 08:42:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:43,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:42:44,098 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:42:44,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:42:44,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:42:44,472 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:42:44,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:42:44,731 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 08:42:44,731 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 45 treesize of output 38 [2021-11-07 08:42:44,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-07 08:42:44,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:42:44,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-07 08:42:44,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033333089] [2021-11-07 08:42:44,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:42:44,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:42:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:42:44,912 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:51,437 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2021-11-07 08:42:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:42:51,437 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 68 [2021-11-07 08:42:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:51,438 INFO L225 Difference]: With dead ends: 132 [2021-11-07 08:42:51,439 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 08:42:51,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 08:42:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 08:42:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2021-11-07 08:42:51,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 88 states have internal predecessors, (93), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:42:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-11-07 08:42:51,445 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 68 [2021-11-07 08:42:51,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:51,446 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-11-07 08:42:51,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-11-07 08:42:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:42:51,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:51,448 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:51,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:51,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 08:42:51,654 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:51,655 INFO L85 PathProgramCache]: Analyzing trace with hash 312186360, now seen corresponding path program 1 times [2021-11-07 08:42:51,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:51,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638048560] [2021-11-07 08:42:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:51,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:51,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:51,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:51,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:51,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:51,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:42:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:51,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:42:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 08:42:52,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:52,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638048560] [2021-11-07 08:42:52,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638048560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:52,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265330057] [2021-11-07 08:42:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:52,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:52,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:52,074 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:52,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:42:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:42:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 08:42:52,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265330057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:52,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:42:52,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-11-07 08:42:52,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982531379] [2021-11-07 08:42:52,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:42:52,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:52,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:42:52,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:42:52,901 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:53,109 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2021-11-07 08:42:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:42:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 71 [2021-11-07 08:42:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:53,111 INFO L225 Difference]: With dead ends: 108 [2021-11-07 08:42:53,111 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 08:42:53,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:42:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 08:42:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-07 08:42:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 88 states have internal predecessors, (92), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:42:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2021-11-07 08:42:53,116 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 71 [2021-11-07 08:42:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:53,116 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2021-11-07 08:42:53,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:42:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2021-11-07 08:42:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:42:53,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:53,118 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:53,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:53,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:42:53,322 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting dll_get_data_atErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1664186068, now seen corresponding path program 2 times [2021-11-07 08:42:53,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:53,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084399539] [2021-11-07 08:42:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:53,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:53,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:53,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:53,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:53,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:53,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:42:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:42:53,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:53,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084399539] [2021-11-07 08:42:53,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084399539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:53,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574224932] [2021-11-07 08:42:53,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:42:53,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:53,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:53,751 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:53,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:42:54,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:42:54,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:54,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:42:54,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 08:42:54,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574224932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:54,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:54,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-11-07 08:42:54,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849810395] [2021-11-07 08:42:54,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:42:54,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:54,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:42:54,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:42:54,726 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-07 08:42:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:55,924 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-11-07 08:42:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:42:55,925 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 71 [2021-11-07 08:42:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:55,926 INFO L225 Difference]: With dead ends: 108 [2021-11-07 08:42:55,926 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 08:42:55,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:42:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 08:42:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2021-11-07 08:42:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 79 states have internal predecessors, (81), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:42:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-11-07 08:42:55,931 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 71 [2021-11-07 08:42:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:55,932 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-11-07 08:42:55,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-07 08:42:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-11-07 08:42:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:42:55,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:55,933 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:42:55,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-07 08:42:56,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 08:42:56,138 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:42:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:56,139 INFO L85 PathProgramCache]: Analyzing trace with hash -390686472, now seen corresponding path program 1 times [2021-11-07 08:42:56,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:56,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715045138] [2021-11-07 08:42:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:56,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:57,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:57,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:42:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:42:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:59,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:42:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:00,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:43:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:00,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:43:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:43:01,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:43:01,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715045138] [2021-11-07 08:43:01,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715045138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:43:01,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580640327] [2021-11-07 08:43:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:01,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:43:01,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:43:01,649 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:43:01,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:43:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:02,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-07 08:43:02,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:43:02,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:43:02,505 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:43:02,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:43:02,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:43:02,887 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:43:02,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:43:03,175 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 08:43:03,176 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 45 treesize of output 38 [2021-11-07 08:43:03,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-07 08:43:03,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:43:03,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-11-07 08:43:03,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541198286] [2021-11-07 08:43:03,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 08:43:03,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:43:03,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 08:43:03,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1948, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:43:03,391 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 40 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 6 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-07 08:43:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:43:15,079 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-11-07 08:43:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:43:15,080 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 6 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 74 [2021-11-07 08:43:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:43:15,081 INFO L225 Difference]: With dead ends: 113 [2021-11-07 08:43:15,081 INFO L226 Difference]: Without dead ends: 113 [2021-11-07 08:43:15,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=400, Invalid=5300, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 08:43:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-07 08:43:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2021-11-07 08:43:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 77 states have internal predecessors, (79), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:43:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-07 08:43:15,088 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 74 [2021-11-07 08:43:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:43:15,089 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-07 08:43:15,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 6 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-07 08:43:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-07 08:43:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:43:15,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:43:15,090 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:43:15,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:43:15,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:43:15,302 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting dll_destroyErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:43:15,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:43:15,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2019154610, now seen corresponding path program 1 times [2021-11-07 08:43:15,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:43:15,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146152380] [2021-11-07 08:43:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:15,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:43:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:15,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:43:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:15,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:43:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:15,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:43:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:15,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:43:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:15,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:43:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:43:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:43:15,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:43:15,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146152380] [2021-11-07 08:43:15,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146152380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:43:15,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:43:15,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 08:43:15,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011782824] [2021-11-07 08:43:15,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:43:15,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:43:15,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:43:15,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:43:15,892 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:43:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:43:17,706 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-11-07 08:43:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:43:17,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 79 [2021-11-07 08:43:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:43:17,708 INFO L225 Difference]: With dead ends: 106 [2021-11-07 08:43:17,708 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 08:43:17,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:43:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 08:43:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-11-07 08:43:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 78 states have internal predecessors, (82), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:43:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-11-07 08:43:17,714 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 79 [2021-11-07 08:43:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:43:17,715 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-11-07 08:43:17,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:43:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-11-07 08:43:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:43:17,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:43:17,717 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:43:17,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 08:43:17,717 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting dll_destroyErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:43:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:43:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2019154609, now seen corresponding path program 1 times [2021-11-07 08:43:17,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:43:17,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688665238] [2021-11-07 08:43:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:17,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:43:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:17,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:43:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:18,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:43:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:18,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:43:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:18,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:43:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:18,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:43:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:18,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:43:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:43:18,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:43:18,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688665238] [2021-11-07 08:43:18,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688665238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:43:18,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:43:18,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 08:43:18,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822379483] [2021-11-07 08:43:18,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:43:18,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:43:18,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:43:18,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:43:18,391 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:43:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:43:20,046 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-11-07 08:43:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:43:20,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 79 [2021-11-07 08:43:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:43:20,048 INFO L225 Difference]: With dead ends: 101 [2021-11-07 08:43:20,048 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 08:43:20,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:43:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 08:43:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-11-07 08:43:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:43:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-11-07 08:43:20,054 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 79 [2021-11-07 08:43:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:43:20,055 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-11-07 08:43:20,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:43:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-11-07 08:43:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:43:20,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:43:20,057 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:43:20,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 08:43:20,058 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:43:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:43:20,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1618015896, now seen corresponding path program 1 times [2021-11-07 08:43:20,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:43:20,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703490358] [2021-11-07 08:43:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:20,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:43:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:20,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:43:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:20,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:43:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:20,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:43:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:20,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:43:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:20,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:43:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:20,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:43:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:43:20,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:43:20,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703490358] [2021-11-07 08:43:20,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703490358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:43:20,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:43:20,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 08:43:20,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288009662] [2021-11-07 08:43:20,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:43:20,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:43:20,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:43:20,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:43:20,705 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:43:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:43:22,316 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-11-07 08:43:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:43:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 82 [2021-11-07 08:43:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:43:22,319 INFO L225 Difference]: With dead ends: 100 [2021-11-07 08:43:22,319 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 08:43:22,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:43:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 08:43:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2021-11-07 08:43:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 81 states have internal predecessors, (84), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:43:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-11-07 08:43:22,324 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 82 [2021-11-07 08:43:22,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:43:22,324 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-11-07 08:43:22,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:43:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-11-07 08:43:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:43:22,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:43:22,325 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:43:22,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 08:43:22,325 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:43:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:43:22,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1619297903, now seen corresponding path program 1 times [2021-11-07 08:43:22,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:43:22,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940870268] [2021-11-07 08:43:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:22,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:43:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:22,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:43:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:22,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:43:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:22,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:43:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:22,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:43:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:22,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:43:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:22,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:43:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:22,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-07 08:43:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:43:22,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:43:22,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940870268] [2021-11-07 08:43:22,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940870268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:43:22,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:43:22,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-07 08:43:22,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420961257] [2021-11-07 08:43:22,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:43:22,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:43:22,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:43:22,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:43:22,852 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 08:43:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:43:24,158 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-11-07 08:43:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:43:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 82 [2021-11-07 08:43:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:43:24,162 INFO L225 Difference]: With dead ends: 100 [2021-11-07 08:43:24,162 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 08:43:24,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:43:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 08:43:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-07 08:43:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.077922077922078) internal successors, (83), 81 states have internal predecessors, (83), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:43:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-11-07 08:43:24,167 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 82 [2021-11-07 08:43:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:43:24,167 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-11-07 08:43:24,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 08:43:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-11-07 08:43:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:43:24,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:43:24,170 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:43:24,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 08:43:24,170 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting dll_destroyErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:43:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:43:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 106460563, now seen corresponding path program 1 times [2021-11-07 08:43:24,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:43:24,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409187655] [2021-11-07 08:43:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:24,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:43:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:25,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:43:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:25,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:43:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:26,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:43:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:27,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:43:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:27,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:43:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:28,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:43:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:43:29,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:43:29,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409187655] [2021-11-07 08:43:29,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409187655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:43:29,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710679341] [2021-11-07 08:43:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:29,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:43:29,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:43:29,102 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:43:29,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:43:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:29,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 08:43:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:43:29,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:43:30,054 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:43:30,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:43:30,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:43:30,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:43:30,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:43:30,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:43:30,904 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-07 08:43:30,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 38 [2021-11-07 08:43:31,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-07 08:43:31,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:43:31,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-11-07 08:43:31,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958851713] [2021-11-07 08:43:31,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:43:31,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:43:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:43:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2215, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 08:43:31,173 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 43 states, 40 states have (on average 1.75) internal successors, (70), 38 states have internal predecessors, (70), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 08:43:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:43:41,554 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-11-07 08:43:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:43:41,555 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.75) internal successors, (70), 38 states have internal predecessors, (70), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 85 [2021-11-07 08:43:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:43:41,556 INFO L225 Difference]: With dead ends: 110 [2021-11-07 08:43:41,556 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 08:43:41,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=501, Invalid=6141, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 08:43:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 08:43:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2021-11-07 08:43:41,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.1) internal successors, (88), 84 states have internal predecessors, (88), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:43:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-11-07 08:43:41,563 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 85 [2021-11-07 08:43:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:43:41,564 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-11-07 08:43:41,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.75) internal successors, (70), 38 states have internal predecessors, (70), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 08:43:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-11-07 08:43:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:43:41,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:43:41,566 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:43:41,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:43:41,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:43:41,774 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting dll_destroyErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:43:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:43:41,775 INFO L85 PathProgramCache]: Analyzing trace with hash 106460564, now seen corresponding path program 1 times [2021-11-07 08:43:41,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:43:41,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967942162] [2021-11-07 08:43:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:41,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:43:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:43,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:43:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:43,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:43:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:44,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:43:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:44,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:43:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:45,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:43:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:46,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:43:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:43:46,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:43:46,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967942162] [2021-11-07 08:43:46,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967942162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:43:46,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049718143] [2021-11-07 08:43:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:46,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:43:46,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:43:46,102 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:43:46,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:43:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:46,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-07 08:43:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:43:46,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:43:46,941 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:43:46,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:43:47,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:43:47,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:43:47,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:43:47,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:43:47,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:43:47,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:43:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:43:47,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:43:47,747 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-07 08:43:47,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 70 [2021-11-07 08:43:47,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:43:47,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:43:47,781 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:43:47,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 81 [2021-11-07 08:43:49,284 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:43:49,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 40 [2021-11-07 08:43:49,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:43:49,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 19 [2021-11-07 08:44:16,957 INFO L354 Elim1Store]: treesize reduction 92, result has 22.0 percent of original size [2021-11-07 08:44:16,957 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 94 treesize of output 88 [2021-11-07 08:44:17,038 INFO L354 Elim1Store]: treesize reduction 76, result has 22.4 percent of original size [2021-11-07 08:44:17,039 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 79 treesize of output 64 [2021-11-07 08:44:17,444 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:44:17,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 40 [2021-11-07 08:44:17,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:44:17,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 19 [2021-11-07 08:44:49,782 INFO L354 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2021-11-07 08:44:49,782 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 115 treesize of output 91 [2021-11-07 08:44:49,890 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-07 08:44:49,891 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 92 treesize of output 78 [2021-11-07 08:45:08,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:45:08,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 63 [2021-11-07 08:45:08,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:45:08,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 56 [2021-11-07 08:45:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:45:13,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049718143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:45:13,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:45:13,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26] total 60 [2021-11-07 08:45:13,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110294947] [2021-11-07 08:45:13,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 08:45:13,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:45:13,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 08:45:13,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3425, Unknown=31, NotChecked=0, Total=3660 [2021-11-07 08:45:13,392 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 61 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 53 states have internal predecessors, (126), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-07 08:47:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:47:35,926 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-11-07 08:47:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:47:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 53 states have internal predecessors, (126), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 85 [2021-11-07 08:47:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:47:35,929 INFO L225 Difference]: With dead ends: 114 [2021-11-07 08:47:35,929 INFO L226 Difference]: Without dead ends: 114 [2021-11-07 08:47:35,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 137.3s TimeCoverageRelationStatistics Valid=749, Invalid=8711, Unknown=46, NotChecked=0, Total=9506 [2021-11-07 08:47:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-07 08:47:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2021-11-07 08:47:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 86 states have internal predecessors, (89), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:47:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-11-07 08:47:35,940 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 85 [2021-11-07 08:47:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:47:35,940 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-11-07 08:47:35,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 53 states have internal predecessors, (126), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-07 08:47:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-11-07 08:47:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 08:47:35,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:47:35,943 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:47:35,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:47:36,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:47:36,154 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:47:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:47:36,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1880758019, now seen corresponding path program 1 times [2021-11-07 08:47:36,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:47:36,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973086332] [2021-11-07 08:47:36,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:47:36,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:47:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:47:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:38,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:47:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:39,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:47:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:40,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:47:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:41,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:47:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:42,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:47:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:47:42,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:47:42,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973086332] [2021-11-07 08:47:42,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973086332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:47:42,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975925925] [2021-11-07 08:47:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:47:42,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:47:42,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:47:42,180 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:47:42,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:47:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:42,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 08:47:42,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:47:42,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:47:43,395 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:47:43,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:47:43,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:47:43,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:47:43,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:47:44,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:47:44,318 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-07 08:47:44,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-11-07 08:47:44,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-07 08:47:44,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:47:44,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-07 08:47:44,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513271295] [2021-11-07 08:47:44,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 08:47:44,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:47:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 08:47:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1680, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:47:44,600 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 37 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 32 states have internal predecessors, (73), 5 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 08:47:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:47:57,204 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2021-11-07 08:47:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:47:57,205 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 32 states have internal predecessors, (73), 5 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 88 [2021-11-07 08:47:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:47:57,206 INFO L225 Difference]: With dead ends: 112 [2021-11-07 08:47:57,206 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 08:47:57,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=446, Invalid=4524, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 08:47:57,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 08:47:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-11-07 08:47:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 87 states have internal predecessors, (90), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:47:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-11-07 08:47:57,212 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 88 [2021-11-07 08:47:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:47:57,213 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-11-07 08:47:57,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 32 states have internal predecessors, (73), 5 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 08:47:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-11-07 08:47:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 08:47:57,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:47:57,215 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:47:57,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:47:57,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:47:57,416 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:47:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:47:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1879476012, now seen corresponding path program 1 times [2021-11-07 08:47:57,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:47:57,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529093454] [2021-11-07 08:47:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:47:57,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:47:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:58,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:47:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:58,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:47:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:47:59,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:47:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:00,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:48:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:01,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:48:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:01,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:48:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:01,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-07 08:48:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:48:03,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:48:03,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529093454] [2021-11-07 08:48:03,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529093454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:48:03,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044602788] [2021-11-07 08:48:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:48:03,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:48:03,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:48:03,118 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:48:03,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:48:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 08:48:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:48:03,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:48:04,425 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:48:04,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:48:04,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:48:05,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:48:05,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 08:48:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:48:05,456 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-07 08:48:05,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-11-07 08:48:05,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-07 08:48:05,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:48:05,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-07 08:48:05,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870842393] [2021-11-07 08:48:05,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 08:48:05,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:48:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 08:48:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1758, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:48:05,785 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 38 states, 36 states have (on average 2.0) internal successors, (72), 33 states have internal predecessors, (72), 5 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-07 08:48:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:48:18,216 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2021-11-07 08:48:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:48:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 33 states have internal predecessors, (72), 5 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 88 [2021-11-07 08:48:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:48:18,219 INFO L225 Difference]: With dead ends: 113 [2021-11-07 08:48:18,219 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 08:48:18,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=424, Invalid=4406, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 08:48:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 08:48:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-11-07 08:48:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 83 states have (on average 1.072289156626506) internal successors, (89), 87 states have internal predecessors, (89), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 08:48:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-11-07 08:48:18,225 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 88 [2021-11-07 08:48:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:48:18,226 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-11-07 08:48:18,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 33 states have internal predecessors, (72), 5 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-07 08:48:18,228 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-11-07 08:48:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 08:48:18,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:48:18,250 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:48:18,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-07 08:48:18,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:48:18,483 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting dll_destroyErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:48:18,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:48:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1813823000, now seen corresponding path program 2 times [2021-11-07 08:48:18,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:48:18,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107948830] [2021-11-07 08:48:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:48:18,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:48:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:20,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:48:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:20,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:48:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:23,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:48:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:23,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:48:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:25,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:48:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:25,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:48:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:48:25,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:48:25,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107948830] [2021-11-07 08:48:25,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107948830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:48:25,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32138484] [2021-11-07 08:48:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:48:25,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:48:25,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:48:25,302 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:48:25,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:48:26,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:48:26,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:48:26,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-07 08:48:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:48:26,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:48:26,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:48:26,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:48:26,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-07 08:48:26,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:48:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:48:26,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-11-07 08:48:26,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-07 08:48:26,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:48:26,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:48:26,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-11-07 08:48:27,140 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:48:27,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-07 08:48:27,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-07 08:48:27,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-07 08:48:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 08:48:27,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 08:48:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:48:28,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-07 08:48:28,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:48:28,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-07 08:48:28,760 INFO L354 Elim1Store]: treesize reduction 151, result has 12.7 percent of original size [2021-11-07 08:48:28,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 124 treesize of output 96 [2021-11-07 08:48:28,871 INFO L354 Elim1Store]: treesize reduction 139, result has 15.8 percent of original size [2021-11-07 08:48:28,871 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 105 treesize of output 93 [2021-11-07 08:48:33,809 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_dll_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_dll_update_at_#in~head.base|) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.offset| |c_dll_update_at_#in~head.base|) dll_update_at_~head.offset)))) (<= dll_update_at_~head.offset |c_dll_update_at_#in~head.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_dll_update_at_#in~head.base|) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.base| |c_dll_update_at_#in~head.base|) dll_update_at_~head.offset)))))) is different from true [2021-11-07 08:48:34,093 INFO L354 Elim1Store]: treesize reduction 104, result has 26.2 percent of original size [2021-11-07 08:48:34,093 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 107 treesize of output 99 [2021-11-07 08:48:34,281 INFO L354 Elim1Store]: treesize reduction 104, result has 26.2 percent of original size [2021-11-07 08:48:34,281 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 10 case distinctions, treesize of input 87 treesize of output 92 [2021-11-07 08:48:39,333 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_update_at_~head.offset Int)) (let ((.cse0 (+ 4 |c_dll_update_at_#in~head.offset|))) (let ((.cse1 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_update_at_#in~head.base|) .cse0))) (and (<= dll_update_at_~head.offset (select (select |c_old(#memory_$Pointer$.offset)| |c_dll_update_at_#in~head.base|) .cse0)) (= (store |c_old(#memory_$Pointer$.base)| .cse1 (store (select |c_old(#memory_$Pointer$.base)| .cse1) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.base| .cse1) dll_update_at_~head.offset))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| .cse1 (store (select |c_old(#memory_$Pointer$.offset)| .cse1) dll_update_at_~head.offset (select (select |c_#memory_$Pointer$.offset| .cse1) dll_update_at_~head.offset)))))))) is different from true [2021-11-07 08:48:39,899 INFO L354 Elim1Store]: treesize reduction 168, result has 32.3 percent of original size [2021-11-07 08:48:39,900 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 15 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 08:48:40,480 INFO L354 Elim1Store]: treesize reduction 152, result has 38.7 percent of original size [2021-11-07 08:48:40,480 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 5 new quantified variables, introduced 15 case distinctions, treesize of input 167 treesize of output 221 [2021-11-07 08:51:55,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_destroy_~head.base] [2021-11-07 08:51:55,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:51:55,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-07 08:51:55,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294196494] [2021-11-07 08:51:55,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 08:51:55,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:51:55,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 08:51:55,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3230, Unknown=8, NotChecked=230, Total=3660 [2021-11-07 08:51:55,668 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 31 states have internal predecessors, (68), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 08:52:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:52:17,254 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2021-11-07 08:52:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:52:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 31 states have internal predecessors, (68), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 91 [2021-11-07 08:52:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:52:17,255 INFO L225 Difference]: With dead ends: 156 [2021-11-07 08:52:17,256 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 08:52:17,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=442, Invalid=6693, Unknown=13, NotChecked=334, Total=7482 [2021-11-07 08:52:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 08:52:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2021-11-07 08:52:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 124 states have (on average 1.0564516129032258) internal successors, (131), 129 states have internal predecessors, (131), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-07 08:52:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2021-11-07 08:52:17,264 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 91 [2021-11-07 08:52:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:52:17,265 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2021-11-07 08:52:17,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 31 states have internal predecessors, (68), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 08:52:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2021-11-07 08:52:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:52:17,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:52:17,267 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:52:17,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:52:17,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 08:52:17,490 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 25 more)] === [2021-11-07 08:52:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:52:17,490 INFO L85 PathProgramCache]: Analyzing trace with hash 616150151, now seen corresponding path program 2 times [2021-11-07 08:52:17,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:52:17,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015680976] [2021-11-07 08:52:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:52:17,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:52:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:52:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:52:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:52:18,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:52:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:52:19,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-07 08:52:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:52:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:52:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:52:20,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-07 08:52:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:52:20,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:52:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:52:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-07 08:52:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:52:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:52:21,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:52:21,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015680976] [2021-11-07 08:52:21,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015680976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:52:21,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551722610] [2021-11-07 08:52:21,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:52:21,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:52:21,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:52:21,589 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:52:21,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e2ae40-7b66-46e0-b48a-49d075bdde1f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:52:22,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:52:22,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:52:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-07 08:52:22,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:52:23,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:52:23,943 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 [2021-11-07 08:52:24,265 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-07 08:52:24,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 52 [2021-11-07 08:52:25,688 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-07 08:52:25,688 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 55 treesize of output 32 [2021-11-07 08:52:25,729 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-07 08:52:25,729 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 24 treesize of output 21 [2021-11-07 08:52:45,088 INFO L354 Elim1Store]: treesize reduction 94, result has 25.4 percent of original size [2021-11-07 08:52:45,089 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 66 [2021-11-07 08:52:46,117 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-07 08:52:46,118 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 84 treesize of output 45 [2021-11-07 08:52:46,167 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-07 08:52:46,167 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 43 treesize of output 40 [2021-11-07 08:53:10,358 INFO L354 Elim1Store]: treesize reduction 136, result has 38.5 percent of original size [2021-11-07 08:53:10,358 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 96 treesize of output 143 [2021-11-07 08:53:17,563 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-07 08:53:17,563 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 226 treesize of output 223