./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:57:11,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:57:11,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:57:11,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:57:11,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:57:11,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:57:11,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:57:11,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:57:11,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:57:11,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:57:11,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:57:11,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:57:11,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:57:12,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:57:12,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:57:12,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:57:12,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:57:12,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:57:12,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:57:12,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:57:12,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:57:12,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:57:12,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:57:12,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:57:12,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:57:12,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:57:12,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:57:12,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:57:12,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:57:12,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:57:12,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:57:12,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:57:12,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:57:12,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:57:12,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:57:12,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:57:12,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:57:12,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:57:12,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:57:12,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:57:12,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:57:12,047 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:57:12,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:57:12,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:57:12,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:57:12,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:57:12,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:57:12,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:57:12,083 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:57:12,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:57:12,084 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:57:12,084 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:57:12,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:57:12,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:57:12,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:57:12,085 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:57:12,085 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:57:12,086 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:57:12,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:57:12,086 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:57:12,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:57:12,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:57:12,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:57:12,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:57:12,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:57:12,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:57:12,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:57:12,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:57:12,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:57:12,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:57:12,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:57:12,093 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_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 [2021-10-28 08:57:12,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:57:12,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:57:12,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:57:12,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:57:12,516 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:57:12,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2021-10-28 08:57:12,623 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/data/83a12c0eb/dc03df7dc2ec44878c1b5175900944fa/FLAGbd4db967f [2021-10-28 08:57:13,290 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:57:13,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2021-10-28 08:57:13,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/data/83a12c0eb/dc03df7dc2ec44878c1b5175900944fa/FLAGbd4db967f [2021-10-28 08:57:13,567 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/data/83a12c0eb/dc03df7dc2ec44878c1b5175900944fa [2021-10-28 08:57:13,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:57:13,573 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:57:13,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:57:13,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:57:13,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:57:13,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:57:13" (1/1) ... [2021-10-28 08:57:13,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7f85b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:13, skipping insertion in model container [2021-10-28 08:57:13,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:57:13" (1/1) ... [2021-10-28 08:57:13,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:57:13,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:57:14,018 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_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i[24556,24569] [2021-10-28 08:57:14,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:57:14,032 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:57:14,086 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_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i[24556,24569] [2021-10-28 08:57:14,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:57:14,126 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:57:14,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14 WrapperNode [2021-10-28 08:57:14,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:57:14,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:57:14,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:57:14,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:57:14,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14" (1/1) ... [2021-10-28 08:57:14,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14" (1/1) ... [2021-10-28 08:57:14,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14" (1/1) ... [2021-10-28 08:57:14,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14" (1/1) ... [2021-10-28 08:57:14,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14" (1/1) ... [2021-10-28 08:57:14,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14" (1/1) ... [2021-10-28 08:57:14,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14" (1/1) ... [2021-10-28 08:57:14,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:57:14,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:57:14,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:57:14,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:57:14,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14" (1/1) ... [2021-10-28 08:57:14,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:57:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:14,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:57:14,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:57:14,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:57:14,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:57:14,301 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:57:14,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:57:14,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:57:14,302 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 08:57:14,302 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-28 08:57:14,302 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-10-28 08:57:14,302 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2021-10-28 08:57:14,302 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_get_data_at [2021-10-28 08:57:14,303 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_update_at [2021-10-28 08:57:14,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:57:14,303 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:57:14,303 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:57:14,303 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:57:14,304 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:57:14,304 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:57:14,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:57:14,304 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:57:14,304 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:57:14,304 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:57:14,305 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:57:14,305 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:57:14,305 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:57:14,305 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:57:14,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:57:14,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:57:14,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:57:14,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:57:14,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:57:14,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:57:14,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:57:14,307 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:57:14,307 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:57:14,307 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:57:14,307 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:57:14,307 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:57:14,307 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:57:14,308 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:57:14,308 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:57:14,308 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:57:14,308 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:57:14,308 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:57:14,308 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:57:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:57:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:57:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:57:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:57:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:57:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:57:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:57:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:57:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:57:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:57:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:57:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:57:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:57:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:57:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:57:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:57:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:57:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:57:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:57:14,312 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:57:14,312 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:57:14,312 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:57:14,312 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:57:14,312 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:57:14,313 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:57:14,313 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:57:14,313 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:57:14,313 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:57:14,313 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:57:14,314 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:57:14,314 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 08:57:14,314 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:57:14,314 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:57:14,314 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:57:14,314 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:57:14,315 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:57:14,315 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:57:14,315 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:57:14,315 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:57:14,315 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:57:14,316 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:57:14,316 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:57:14,316 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:57:14,316 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:57:14,316 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:57:14,316 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:57:14,317 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:57:14,317 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:57:14,317 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:57:14,317 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:57:14,317 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:57:14,317 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:57:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:57:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:57:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:57:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:57:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:57:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:57:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:57:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:57:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:57:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:57:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:57:14,320 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:57:14,320 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:57:14,320 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:57:14,320 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:57:14,320 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:57:14,320 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:57:14,321 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:57:14,321 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:57:14,321 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:57:14,321 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:57:14,321 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:57:14,321 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:57:14,322 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:57:14,322 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:57:14,322 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:57:14,322 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 08:57:14,322 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-28 08:57:14,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:57:14,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:57:14,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:57:14,323 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-10-28 08:57:14,323 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2021-10-28 08:57:14,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:57:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:57:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_get_data_at [2021-10-28 08:57:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:57:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_update_at [2021-10-28 08:57:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:57:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:57:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:57:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:57:14,936 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 08:57:15,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:57:15,123 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 08:57:15,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:57:15 BoogieIcfgContainer [2021-10-28 08:57:15,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:57:15,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:57:15,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:57:15,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:57:15,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:57:13" (1/3) ... [2021-10-28 08:57:15,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce1f536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:57:15, skipping insertion in model container [2021-10-28 08:57:15,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:57:14" (2/3) ... [2021-10-28 08:57:15,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce1f536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:57:15, skipping insertion in model container [2021-10-28 08:57:15,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:57:15" (3/3) ... [2021-10-28 08:57:15,143 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_update_all_reverse.i [2021-10-28 08:57:15,157 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:57:15,157 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-10-28 08:57:15,228 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:57:15,240 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:57:15,241 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-10-28 08:57:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 63 states have (on average 1.7936507936507937) internal successors, (113), 97 states have internal predecessors, (113), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:57:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:57:15,289 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:15,290 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:15,291 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash 128365921, now seen corresponding path program 1 times [2021-10-28 08:57:15,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:15,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666995443] [2021-10-28 08:57:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:15,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:15,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:57:15,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:15,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666995443] [2021-10-28 08:57:15,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666995443] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:15,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:15,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:57:15,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78752492] [2021-10-28 08:57:15,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:57:15,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:57:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:57:15,711 INFO L87 Difference]: Start difference. First operand has 114 states, 63 states have (on average 1.7936507936507937) internal successors, (113), 97 states have internal predecessors, (113), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:57:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:16,241 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-10-28 08:57:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:57:16,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 08:57:16,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:16,260 INFO L225 Difference]: With dead ends: 130 [2021-10-28 08:57:16,260 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 08:57:16,264 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 [2021-10-28 08:57:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 08:57:16,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2021-10-28 08:57:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 90 states have internal predecessors, (98), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:57:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2021-10-28 08:57:16,314 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 12 [2021-10-28 08:57:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:16,315 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2021-10-28 08:57:16,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:57:16,315 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2021-10-28 08:57:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:57:16,316 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:16,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:16,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:57:16,317 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash 128365922, now seen corresponding path program 1 times [2021-10-28 08:57:16,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:16,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164855184] [2021-10-28 08:57:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:16,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:16,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:57:16,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:16,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164855184] [2021-10-28 08:57:16,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164855184] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:16,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:16,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:57:16,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945889350] [2021-10-28 08:57:16,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:57:16,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:16,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:57:16,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:57:16,464 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:57:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:16,794 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-10-28 08:57:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:57:16,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 08:57:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:16,803 INFO L225 Difference]: With dead ends: 121 [2021-10-28 08:57:16,803 INFO L226 Difference]: Without dead ends: 121 [2021-10-28 08:57:16,804 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 [2021-10-28 08:57:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-28 08:57:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-10-28 08:57:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 87 states have internal predecessors, (95), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:57:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-10-28 08:57:16,834 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 12 [2021-10-28 08:57:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:16,835 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-10-28 08:57:16,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:57:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-10-28 08:57:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:57:16,836 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:16,836 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:16,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:57:16,837 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1287918133, now seen corresponding path program 1 times [2021-10-28 08:57:16,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:16,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646633193] [2021-10-28 08:57:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:16,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:17,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:17,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:57:17,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:17,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646633193] [2021-10-28 08:57:17,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646633193] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:17,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:17,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:57:17,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715744698] [2021-10-28 08:57:17,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:57:17,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:57:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:57:17,142 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:57:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:17,769 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-10-28 08:57:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:57:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-10-28 08:57:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:17,782 INFO L225 Difference]: With dead ends: 132 [2021-10-28 08:57:17,783 INFO L226 Difference]: Without dead ends: 132 [2021-10-28 08:57:17,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:57:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-28 08:57:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2021-10-28 08:57:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 88 states have internal predecessors, (96), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:57:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2021-10-28 08:57:17,800 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 20 [2021-10-28 08:57:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:17,801 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2021-10-28 08:57:17,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:57:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2021-10-28 08:57:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 08:57:17,802 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:17,803 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:17,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:57:17,803 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 60501513, now seen corresponding path program 1 times [2021-10-28 08:57:17,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:17,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019049810] [2021-10-28 08:57:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:17,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:17,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:17,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:17,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:57:17,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:17,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019049810] [2021-10-28 08:57:17,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019049810] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:17,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:17,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:57:17,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023980160] [2021-10-28 08:57:17,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:57:17,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:57:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:57:17,980 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:57:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:18,495 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-10-28 08:57:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:57:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-10-28 08:57:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:18,498 INFO L225 Difference]: With dead ends: 122 [2021-10-28 08:57:18,498 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 08:57:18,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:57:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 08:57:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-10-28 08:57:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 87 states have internal predecessors, (95), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:57:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-10-28 08:57:18,514 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 30 [2021-10-28 08:57:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:18,515 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-10-28 08:57:18,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:57:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-10-28 08:57:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 08:57:18,517 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:18,522 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:18,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:57:18,525 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:18,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:18,526 INFO L85 PathProgramCache]: Analyzing trace with hash 60501514, now seen corresponding path program 1 times [2021-10-28 08:57:18,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:18,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317992860] [2021-10-28 08:57:18,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:18,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:18,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:18,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:18,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:18,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317992860] [2021-10-28 08:57:18,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317992860] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:18,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:18,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:57:18,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624522326] [2021-10-28 08:57:18,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:57:18,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:57:18,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:57:18,795 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:57:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:19,325 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2021-10-28 08:57:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:57:19,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-10-28 08:57:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:19,328 INFO L225 Difference]: With dead ends: 121 [2021-10-28 08:57:19,328 INFO L226 Difference]: Without dead ends: 121 [2021-10-28 08:57:19,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:57:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-28 08:57:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-10-28 08:57:19,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.540983606557377) internal successors, (94), 86 states have internal predecessors, (94), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:57:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-10-28 08:57:19,342 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 30 [2021-10-28 08:57:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:19,342 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-10-28 08:57:19,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:57:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-10-28 08:57:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 08:57:19,344 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:19,344 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] [2021-10-28 08:57:19,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:57:19,345 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1987588278, now seen corresponding path program 1 times [2021-10-28 08:57:19,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:19,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654237527] [2021-10-28 08:57:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:19,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:19,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:19,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:19,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:19,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:19,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654237527] [2021-10-28 08:57:19,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654237527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:19,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91187274] [2021-10-28 08:57:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:19,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:19,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:19,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:19,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:57:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:57:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:19,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:57:20,289 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 08:57:20,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 08:57:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:57:20,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91187274] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:20,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:57:20,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-10-28 08:57:20,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657766769] [2021-10-28 08:57:20,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:57:20,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:20,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:57:20,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:57:20,471 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:57:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:21,315 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-10-28 08:57:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:57:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-10-28 08:57:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:21,318 INFO L225 Difference]: With dead ends: 128 [2021-10-28 08:57:21,318 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 08:57:21,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:57:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 08:57:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2021-10-28 08:57:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.5384615384615385) internal successors, (100), 90 states have internal predecessors, (100), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:57:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-10-28 08:57:21,326 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 32 [2021-10-28 08:57:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:21,327 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-10-28 08:57:21,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:57:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-10-28 08:57:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 08:57:21,329 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:21,329 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] [2021-10-28 08:57:21,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:21,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:21,554 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:21,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1987588277, now seen corresponding path program 1 times [2021-10-28 08:57:21,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:21,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959700058] [2021-10-28 08:57:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:21,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:21,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:21,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:21,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:21,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:21,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959700058] [2021-10-28 08:57:21,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959700058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:21,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995232800] [2021-10-28 08:57:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:21,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:21,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:21,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:57:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 08:57:22,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:22,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:57:22,555 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:57:22,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-28 08:57:22,564 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:57:22,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-28 08:57:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:57:22,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995232800] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:22,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:57:22,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-28 08:57:22,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94114671] [2021-10-28 08:57:22,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 08:57:22,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 08:57:22,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:57:22,707 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:57:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:23,898 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2021-10-28 08:57:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:57:23,899 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-10-28 08:57:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:23,900 INFO L225 Difference]: With dead ends: 127 [2021-10-28 08:57:23,900 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 08:57:23,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:57:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 08:57:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2021-10-28 08:57:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.523076923076923) internal successors, (99), 90 states have internal predecessors, (99), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:57:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-10-28 08:57:23,907 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 32 [2021-10-28 08:57:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:23,907 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-10-28 08:57:23,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:57:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-10-28 08:57:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 08:57:23,909 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:23,910 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:23,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:24,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:24,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:24,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1188265856, now seen corresponding path program 1 times [2021-10-28 08:57:24,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:24,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226164256] [2021-10-28 08:57:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:24,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:24,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:24,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:24,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:24,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:24,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226164256] [2021-10-28 08:57:24,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226164256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:24,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534362176] [2021-10-28 08:57:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:24,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:24,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:24,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:24,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:57:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:57:24,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:24,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534362176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:24,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:57:24,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-10-28 08:57:24,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828897650] [2021-10-28 08:57:24,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:57:24,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:57:24,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:57:24,577 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 08:57:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:25,041 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-10-28 08:57:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:57:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-10-28 08:57:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:25,043 INFO L225 Difference]: With dead ends: 126 [2021-10-28 08:57:25,043 INFO L226 Difference]: Without dead ends: 126 [2021-10-28 08:57:25,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:57:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-28 08:57:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2021-10-28 08:57:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 90 states have internal predecessors, (98), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:57:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2021-10-28 08:57:25,050 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 34 [2021-10-28 08:57:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:25,051 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2021-10-28 08:57:25,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 08:57:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2021-10-28 08:57:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:57:25,053 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:25,053 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:25,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:25,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:25,278 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1823244786, now seen corresponding path program 1 times [2021-10-28 08:57:25,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:25,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861148365] [2021-10-28 08:57:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:25,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:25,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:25,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:25,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 08:57:25,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:25,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861148365] [2021-10-28 08:57:25,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861148365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:25,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473901101] [2021-10-28 08:57:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:25,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:25,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:25,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:57:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:57:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 08:57:25,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473901101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:25,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:57:25,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 6 [2021-10-28 08:57:25,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859529869] [2021-10-28 08:57:25,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:57:25,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:57:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:57:25,808 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:57:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:26,229 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2021-10-28 08:57:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:57:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-10-28 08:57:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:26,231 INFO L225 Difference]: With dead ends: 130 [2021-10-28 08:57:26,231 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 08:57:26,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:57:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 08:57:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-10-28 08:57:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 93 states have internal predecessors, (103), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:57:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-10-28 08:57:26,238 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 35 [2021-10-28 08:57:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:26,238 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-10-28 08:57:26,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:57:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-10-28 08:57:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:57:26,242 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:26,242 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:26,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:26,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:26,462 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr5REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:26,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1823244785, now seen corresponding path program 1 times [2021-10-28 08:57:26,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:26,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252957756] [2021-10-28 08:57:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:26,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:26,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:26,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:26,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:26,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:26,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252957756] [2021-10-28 08:57:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252957756] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:26,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929703385] [2021-10-28 08:57:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:26,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:26,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:26,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:57:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:26,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 08:57:26,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:27,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929703385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:27,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:57:27,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-10-28 08:57:27,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431916401] [2021-10-28 08:57:27,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:57:27,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:27,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:57:27,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:57:27,223 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:57:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:27,900 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-10-28 08:57:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:57:27,901 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-10-28 08:57:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:27,902 INFO L225 Difference]: With dead ends: 135 [2021-10-28 08:57:27,903 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 08:57:27,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:57:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 08:57:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-10-28 08:57:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.5) internal successors, (102), 93 states have internal predecessors, (102), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:57:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-10-28 08:57:27,909 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 35 [2021-10-28 08:57:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:27,910 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-10-28 08:57:27,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:57:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-10-28 08:57:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 08:57:27,911 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:27,911 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:27,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:28,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:28,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_circular_createErr6REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:28,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:28,113 INFO L85 PathProgramCache]: Analyzing trace with hash -686013508, now seen corresponding path program 1 times [2021-10-28 08:57:28,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:28,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453363442] [2021-10-28 08:57:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:28,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:28,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:28,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:28,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:57:28,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:28,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453363442] [2021-10-28 08:57:28,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453363442] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:28,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:28,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:57:28,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378671945] [2021-10-28 08:57:28,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:57:28,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:28,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:57:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:57:28,265 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:57:28,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:28,780 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-10-28 08:57:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:57:28,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-10-28 08:57:28,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:28,782 INFO L225 Difference]: With dead ends: 128 [2021-10-28 08:57:28,783 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 08:57:28,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:57:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 08:57:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2021-10-28 08:57:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 68 states have (on average 1.4852941176470589) internal successors, (101), 92 states have internal predecessors, (101), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:57:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-10-28 08:57:28,790 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 36 [2021-10-28 08:57:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:28,790 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-10-28 08:57:28,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:57:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-10-28 08:57:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 08:57:28,794 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:28,794 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:28,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 08:57:28,795 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash -686013507, now seen corresponding path program 1 times [2021-10-28 08:57:28,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:28,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366391340] [2021-10-28 08:57:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:28,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:28,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:28,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:29,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:29,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366391340] [2021-10-28 08:57:29,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366391340] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:29,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:29,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:57:29,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292212041] [2021-10-28 08:57:29,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:57:29,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:57:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:57:29,013 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:57:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:29,571 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-10-28 08:57:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:57:29,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-10-28 08:57:29,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:29,573 INFO L225 Difference]: With dead ends: 126 [2021-10-28 08:57:29,573 INFO L226 Difference]: Without dead ends: 126 [2021-10-28 08:57:29,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:57:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-28 08:57:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2021-10-28 08:57:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 91 states have internal predecessors, (100), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:57:29,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-10-28 08:57:29,579 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 36 [2021-10-28 08:57:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:29,579 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-10-28 08:57:29,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:57:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-10-28 08:57:29,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:57:29,586 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:29,587 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:29,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 08:57:29,587 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:29,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1949112644, now seen corresponding path program 1 times [2021-10-28 08:57:29,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:29,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71999336] [2021-10-28 08:57:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:29,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:29,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:29,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:29,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:29,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 08:57:29,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:29,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71999336] [2021-10-28 08:57:29,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71999336] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:29,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:29,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:57:29,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799957632] [2021-10-28 08:57:29,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:57:29,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:57:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:57:29,789 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:57:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:30,329 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2021-10-28 08:57:30,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:57:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2021-10-28 08:57:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:30,333 INFO L225 Difference]: With dead ends: 148 [2021-10-28 08:57:30,333 INFO L226 Difference]: Without dead ends: 148 [2021-10-28 08:57:30,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:57:30,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-28 08:57:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2021-10-28 08:57:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 101 states have internal predecessors, (114), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:57:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2021-10-28 08:57:30,341 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 45 [2021-10-28 08:57:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:30,342 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2021-10-28 08:57:30,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:57:30,342 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2021-10-28 08:57:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:57:30,343 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:30,344 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:30,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 08:57:30,344 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_circular_update_atErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:30,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1949112698, now seen corresponding path program 1 times [2021-10-28 08:57:30,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:30,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495347418] [2021-10-28 08:57:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:30,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:30,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:30,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:30,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:30,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:57:30,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:30,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495347418] [2021-10-28 08:57:30,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495347418] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:30,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:30,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 08:57:30,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847847718] [2021-10-28 08:57:30,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:57:30,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:57:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:57:30,574 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:57:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:31,417 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2021-10-28 08:57:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:57:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-10-28 08:57:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:31,419 INFO L225 Difference]: With dead ends: 147 [2021-10-28 08:57:31,420 INFO L226 Difference]: Without dead ends: 147 [2021-10-28 08:57:31,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:57:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-28 08:57:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 122. [2021-10-28 08:57:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 105 states have internal predecessors, (122), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:57:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-10-28 08:57:31,426 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 45 [2021-10-28 08:57:31,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:31,427 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-10-28 08:57:31,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:57:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-10-28 08:57:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:57:31,428 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:31,429 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:31,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 08:57:31,429 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_circular_update_atErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1949112699, now seen corresponding path program 1 times [2021-10-28 08:57:31,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:31,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330563714] [2021-10-28 08:57:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:31,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:31,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:31,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:31,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:31,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:31,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:31,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330563714] [2021-10-28 08:57:31,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330563714] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:31,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:31,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 08:57:31,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093016154] [2021-10-28 08:57:31,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:57:31,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:31,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:57:31,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:57:31,778 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:57:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:32,741 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2021-10-28 08:57:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:57:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-10-28 08:57:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:32,743 INFO L225 Difference]: With dead ends: 145 [2021-10-28 08:57:32,743 INFO L226 Difference]: Without dead ends: 145 [2021-10-28 08:57:32,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:57:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-28 08:57:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 122. [2021-10-28 08:57:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.4691358024691359) internal successors, (119), 105 states have internal predecessors, (119), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:57:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2021-10-28 08:57:32,754 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 45 [2021-10-28 08:57:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:32,754 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2021-10-28 08:57:32,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:57:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2021-10-28 08:57:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 08:57:32,756 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:32,756 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:32,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 08:57:32,756 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:32,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1650408867, now seen corresponding path program 1 times [2021-10-28 08:57:32,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:32,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699656906] [2021-10-28 08:57:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:32,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:32,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:32,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:57:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:32,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-10-28 08:57:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:32,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-28 08:57:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 08:57:32,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:32,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699656906] [2021-10-28 08:57:32,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699656906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:32,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091229979] [2021-10-28 08:57:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:32,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:32,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:32,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:32,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:57:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:57:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 08:57:33,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091229979] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:33,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:57:33,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-10-28 08:57:33,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207312921] [2021-10-28 08:57:33,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:57:33,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:57:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:57:33,371 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:57:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:33,431 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2021-10-28 08:57:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:57:33,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2021-10-28 08:57:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:33,434 INFO L225 Difference]: With dead ends: 110 [2021-10-28 08:57:33,434 INFO L226 Difference]: Without dead ends: 110 [2021-10-28 08:57:33,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:57:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-28 08:57:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-28 08:57:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 94 states have internal predecessors, (105), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:57:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2021-10-28 08:57:33,443 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 47 [2021-10-28 08:57:33,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:33,443 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2021-10-28 08:57:33,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:57:33,444 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2021-10-28 08:57:33,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 08:57:33,445 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:33,445 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:33,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:33,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:57:33,660 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1941428179, now seen corresponding path program 1 times [2021-10-28 08:57:33,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:33,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119760385] [2021-10-28 08:57:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:33,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:33,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:34,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:34,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:34,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:34,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119760385] [2021-10-28 08:57:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119760385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:34,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888318354] [2021-10-28 08:57:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:34,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:34,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:34,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:57:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:34,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 82 conjunts are in the unsatisfiable core [2021-10-28 08:57:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:34,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:57:35,568 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 08:57:35,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-10-28 08:57:35,602 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:57:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:57:35,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:57:35,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:57:35,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 08:57:36,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 08:57:36,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-10-28 08:57:36,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-10-28 08:57:36,539 INFO L354 Elim1Store]: treesize reduction 112, result has 21.1 percent of original size [2021-10-28 08:57:36,539 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 99 treesize of output 104 [2021-10-28 08:57:36,580 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-10-28 08:57:36,580 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 95 treesize of output 79 [2021-10-28 08:57:38,029 INFO L354 Elim1Store]: treesize reduction 86, result has 3.4 percent of original size [2021-10-28 08:57:38,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 79 [2021-10-28 08:57:38,053 INFO L354 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2021-10-28 08:57:38,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 44 [2021-10-28 08:57:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:57:38,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888318354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:38,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:57:38,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-10-28 08:57:38,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162505128] [2021-10-28 08:57:38,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 08:57:38,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:38,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 08:57:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1969, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 08:57:38,309 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 46 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 35 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:57:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:43,487 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2021-10-28 08:57:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 08:57:43,488 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 35 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-10-28 08:57:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:43,489 INFO L225 Difference]: With dead ends: 175 [2021-10-28 08:57:43,489 INFO L226 Difference]: Without dead ends: 175 [2021-10-28 08:57:43,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=279, Invalid=4143, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 08:57:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-28 08:57:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 131. [2021-10-28 08:57:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 113 states have internal predecessors, (130), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2021-10-28 08:57:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2021-10-28 08:57:43,500 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 48 [2021-10-28 08:57:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:43,500 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2021-10-28 08:57:43,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 35 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:57:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2021-10-28 08:57:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 08:57:43,502 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:43,502 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:43,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:43,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:57:43,718 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_circular_update_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1941428180, now seen corresponding path program 1 times [2021-10-28 08:57:43,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:43,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028548817] [2021-10-28 08:57:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:43,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:43,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:43,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:44,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:44,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:57:44,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:44,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028548817] [2021-10-28 08:57:44,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028548817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:44,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283903707] [2021-10-28 08:57:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:44,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:44,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:44,258 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:44,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:57:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:44,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-28 08:57:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:44,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:57:44,962 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:57:44,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:57:45,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:57:45,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 08:57:45,316 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-28 08:57:45,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-28 08:57:45,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:57:45,486 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-28 08:57:45,486 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 48 treesize of output 41 [2021-10-28 08:57:46,136 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-28 08:57:46,137 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 49 treesize of output 22 [2021-10-28 08:57:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:57:46,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283903707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:46,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:57:46,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2021-10-28 08:57:46,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273638092] [2021-10-28 08:57:46,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 08:57:46,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 08:57:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 08:57:46,155 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand has 41 states, 40 states have (on average 1.675) internal successors, (67), 30 states have internal predecessors, (67), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:57:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:48,120 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2021-10-28 08:57:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:57:48,126 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 30 states have internal predecessors, (67), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-10-28 08:57:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:48,127 INFO L225 Difference]: With dead ends: 154 [2021-10-28 08:57:48,127 INFO L226 Difference]: Without dead ends: 154 [2021-10-28 08:57:48,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=242, Invalid=2838, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 08:57:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-28 08:57:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 131. [2021-10-28 08:57:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 113 states have internal predecessors, (128), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2021-10-28 08:57:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2021-10-28 08:57:48,137 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 48 [2021-10-28 08:57:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:48,138 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2021-10-28 08:57:48,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 30 states have internal predecessors, (67), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:57:48,138 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2021-10-28 08:57:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 08:57:48,139 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:48,139 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:48,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:48,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:57:48,353 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:48,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1055636316, now seen corresponding path program 2 times [2021-10-28 08:57:48,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:48,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872090921] [2021-10-28 08:57:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:48,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:48,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:48,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:48,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:48,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 08:57:48,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:48,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872090921] [2021-10-28 08:57:48,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872090921] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:48,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:48,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:57:48,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696505327] [2021-10-28 08:57:48,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:57:48,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:57:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:57:48,535 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:57:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:48,965 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2021-10-28 08:57:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:57:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2021-10-28 08:57:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:48,967 INFO L225 Difference]: With dead ends: 139 [2021-10-28 08:57:48,967 INFO L226 Difference]: Without dead ends: 139 [2021-10-28 08:57:48,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:57:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-28 08:57:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2021-10-28 08:57:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 102 states have internal predecessors, (109), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 08:57:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2021-10-28 08:57:48,974 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 51 [2021-10-28 08:57:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:48,974 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2021-10-28 08:57:48,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:57:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2021-10-28 08:57:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 08:57:48,976 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:48,976 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:48,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 08:57:48,976 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_circular_get_data_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1804686976, now seen corresponding path program 1 times [2021-10-28 08:57:48,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:48,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402924619] [2021-10-28 08:57:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:48,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:49,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:49,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:49,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:49,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:49,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 08:57:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 08:57:49,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:49,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402924619] [2021-10-28 08:57:49,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402924619] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:49,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:49,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 08:57:49,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178727670] [2021-10-28 08:57:49,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:57:49,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:49,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:57:49,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:57:49,250 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:57:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:50,004 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2021-10-28 08:57:50,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:57:50,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-10-28 08:57:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:50,006 INFO L225 Difference]: With dead ends: 147 [2021-10-28 08:57:50,006 INFO L226 Difference]: Without dead ends: 147 [2021-10-28 08:57:50,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:57:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-28 08:57:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 123. [2021-10-28 08:57:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 86 states have (on average 1.3372093023255813) internal successors, (115), 105 states have internal predecessors, (115), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 08:57:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2021-10-28 08:57:50,014 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 58 [2021-10-28 08:57:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:50,015 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2021-10-28 08:57:50,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:57:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2021-10-28 08:57:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 08:57:50,016 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:50,016 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:50,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 08:57:50,017 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1804686977, now seen corresponding path program 1 times [2021-10-28 08:57:50,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:50,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10979505] [2021-10-28 08:57:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:50,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:50,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:50,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:50,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:50,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:50,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 08:57:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 08:57:50,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:50,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10979505] [2021-10-28 08:57:50,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10979505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:50,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197917311] [2021-10-28 08:57:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:50,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:50,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:50,194 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:50,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:57:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 08:57:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 08:57:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197917311] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:50,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:57:50,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-10-28 08:57:50,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399483216] [2021-10-28 08:57:50,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:57:50,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:57:50,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:57:50,831 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 08:57:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:51,216 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2021-10-28 08:57:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:57:51,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 58 [2021-10-28 08:57:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:51,218 INFO L225 Difference]: With dead ends: 151 [2021-10-28 08:57:51,218 INFO L226 Difference]: Without dead ends: 151 [2021-10-28 08:57:51,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:57:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-28 08:57:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 130. [2021-10-28 08:57:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 92 states have (on average 1.326086956521739) internal successors, (122), 110 states have internal predecessors, (122), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-10-28 08:57:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2021-10-28 08:57:51,226 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 58 [2021-10-28 08:57:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:51,227 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2021-10-28 08:57:51,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 08:57:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2021-10-28 08:57:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 08:57:51,228 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:51,228 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] [2021-10-28 08:57:51,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:51,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 08:57:51,450 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting dll_circular_update_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:51,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1315451377, now seen corresponding path program 1 times [2021-10-28 08:57:51,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:51,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567203542] [2021-10-28 08:57:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:51,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:51,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:51,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:51,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:51,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:51,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 08:57:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 08:57:51,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:51,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567203542] [2021-10-28 08:57:51,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567203542] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:51,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660120263] [2021-10-28 08:57:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:51,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:51,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:51,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:51,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:57:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:52,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:57:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 08:57:52,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660120263] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:52,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:57:52,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 13 [2021-10-28 08:57:52,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781657151] [2021-10-28 08:57:52,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:57:52,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:57:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:57:52,439 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:57:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:52,523 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-10-28 08:57:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:57:52,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 59 [2021-10-28 08:57:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:52,526 INFO L225 Difference]: With dead ends: 118 [2021-10-28 08:57:52,526 INFO L226 Difference]: Without dead ends: 118 [2021-10-28 08:57:52,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:57:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-28 08:57:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2021-10-28 08:57:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 92 states have internal predecessors, (101), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:57:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-10-28 08:57:52,534 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 59 [2021-10-28 08:57:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:52,535 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-10-28 08:57:52,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:57:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-10-28 08:57:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 08:57:52,536 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:52,536 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:52,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:57:52,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 08:57:52,753 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:52,754 INFO L85 PathProgramCache]: Analyzing trace with hash -978281579, now seen corresponding path program 2 times [2021-10-28 08:57:52,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:52,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897499930] [2021-10-28 08:57:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:52,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:52,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:52,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:52,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:52,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:52,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 08:57:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:52,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 08:57:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 08:57:52,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:52,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897499930] [2021-10-28 08:57:52,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897499930] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:52,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:52,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:57:52,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369254297] [2021-10-28 08:57:52,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:57:52,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:57:52,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:57:52,958 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:57:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:53,523 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-10-28 08:57:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:57:53,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2021-10-28 08:57:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:53,525 INFO L225 Difference]: With dead ends: 145 [2021-10-28 08:57:53,525 INFO L226 Difference]: Without dead ends: 145 [2021-10-28 08:57:53,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:57:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-28 08:57:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 120. [2021-10-28 08:57:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 86 states have (on average 1.3488372093023255) internal successors, (116), 101 states have internal predecessors, (116), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:57:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2021-10-28 08:57:53,532 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 66 [2021-10-28 08:57:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:53,533 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2021-10-28 08:57:53,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:57:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2021-10-28 08:57:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 08:57:53,534 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:53,534 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:53,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-28 08:57:53,535 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_circular_get_data_atErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:53,535 INFO L85 PathProgramCache]: Analyzing trace with hash -978281524, now seen corresponding path program 1 times [2021-10-28 08:57:53,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:53,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212692438] [2021-10-28 08:57:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:53,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:53,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:53,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:53,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:53,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:53,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 08:57:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:53,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 08:57:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 08:57:53,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:53,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212692438] [2021-10-28 08:57:53,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212692438] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:57:53,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:57:53,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 08:57:53,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095540178] [2021-10-28 08:57:53,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:57:53,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:57:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:57:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:57:53,941 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:57:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:57:54,782 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-10-28 08:57:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:57:54,783 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2021-10-28 08:57:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:57:54,784 INFO L225 Difference]: With dead ends: 144 [2021-10-28 08:57:54,784 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 08:57:54,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:57:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 08:57:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 120. [2021-10-28 08:57:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 86 states have (on average 1.313953488372093) internal successors, (113), 101 states have internal predecessors, (113), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:57:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-10-28 08:57:54,791 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 66 [2021-10-28 08:57:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:57:54,791 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-10-28 08:57:54,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:57:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-10-28 08:57:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-28 08:57:54,793 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:57:54,793 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:57:54,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-28 08:57:54,793 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_circular_get_data_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:57:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:57:54,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1663214807, now seen corresponding path program 1 times [2021-10-28 08:57:54,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:57:54,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518203681] [2021-10-28 08:57:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:54,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:57:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:54,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:57:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:55,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:57:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:55,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:57:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:55,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:57:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:55,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 08:57:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:55,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 08:57:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:57:55,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:57:55,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518203681] [2021-10-28 08:57:55,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518203681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:57:55,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311155120] [2021-10-28 08:57:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:57:55,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:57:55,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:57:55,902 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:57:55,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:57:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:57:56,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-28 08:57:56,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:57:56,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:57:56,733 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:57:56,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:57:56,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:57:56,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 08:57:57,164 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-28 08:57:57,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-28 08:57:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:57:57,285 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-28 08:57:57,286 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 39 treesize of output 36 [2021-10-28 08:57:59,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:57:59,291 INFO L354 Elim1Store]: treesize reduction 130, result has 19.8 percent of original size [2021-10-28 08:57:59,292 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 75 treesize of output 65 [2021-10-28 08:57:59,451 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-28 08:57:59,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-10-28 08:58:15,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:58:15,477 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-10-28 08:58:15,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 32 [2021-10-28 08:58:15,798 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-28 08:58:15,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 22 [2021-10-28 08:58:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:58:15,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311155120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:58:15,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:58:15,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 50 [2021-10-28 08:58:15,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638369360] [2021-10-28 08:58:15,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 08:58:15,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:58:15,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 08:58:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2392, Unknown=17, NotChecked=0, Total=2550 [2021-10-28 08:58:15,816 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 51 states, 50 states have (on average 1.8) internal successors, (90), 38 states have internal predecessors, (90), 8 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 08:58:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:58:23,008 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2021-10-28 08:58:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 08:58:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.8) internal successors, (90), 38 states have internal predecessors, (90), 8 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 69 [2021-10-28 08:58:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:58:23,011 INFO L225 Difference]: With dead ends: 156 [2021-10-28 08:58:23,011 INFO L226 Difference]: Without dead ends: 156 [2021-10-28 08:58:23,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=433, Invalid=5100, Unknown=17, NotChecked=0, Total=5550 [2021-10-28 08:58:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-28 08:58:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 128. [2021-10-28 08:58:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 94 states have (on average 1.351063829787234) internal successors, (127), 109 states have internal predecessors, (127), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:58:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2021-10-28 08:58:23,019 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 69 [2021-10-28 08:58:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:58:23,020 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2021-10-28 08:58:23,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.8) internal successors, (90), 38 states have internal predecessors, (90), 8 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 08:58:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2021-10-28 08:58:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-28 08:58:23,021 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:58:23,021 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:58:23,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:58:23,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 08:58:23,246 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 08:58:23,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:58:23,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1663214808, now seen corresponding path program 1 times [2021-10-28 08:58:23,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:58:23,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645614556] [2021-10-28 08:58:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:58:23,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:58:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:58:23,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:58:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:58:23,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:58:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:58:23,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:58:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:58:23,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:58:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:58:24,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 08:58:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:58:24,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 08:58:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:58:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:58:24,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:58:24,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645614556] [2021-10-28 08:58:24,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645614556] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:58:24,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233890481] [2021-10-28 08:58:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:58:24,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:58:24,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:58:24,606 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:58:24,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:58:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:58:25,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-28 08:58:25,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:58:25,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:58:25,486 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:58:25,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:58:25,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:58:25,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 08:58:25,879 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-28 08:58:25,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-28 08:58:28,006 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 63 treesize of output 59 [2021-10-28 08:58:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:58:28,046 INFO L354 Elim1Store]: treesize reduction 128, result has 15.2 percent of original size [2021-10-28 08:58:28,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 52 [2021-10-28 08:58:37,111 INFO L354 Elim1Store]: treesize reduction 335, result has 15.6 percent of original size [2021-10-28 08:58:37,112 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 7 new quantified variables, introduced 15 case distinctions, treesize of input 150 treesize of output 151 [2021-10-28 08:58:37,139 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-10-28 08:58:37,139 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 135 treesize of output 112 [2021-10-28 08:58:37,347 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-28 08:58:37,347 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 73 treesize of output 48 [2021-10-28 08:58:37,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:58:37,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2021-10-28 08:59:06,514 INFO L354 Elim1Store]: treesize reduction 130, result has 16.7 percent of original size [2021-10-28 08:59:06,515 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 114 treesize of output 95 [2021-10-28 08:59:06,541 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-10-28 08:59:06,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 70 [2021-10-28 08:59:07,176 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-28 08:59:07,176 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 87 treesize of output 58 [2021-10-28 08:59:07,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:59:07,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 29 [2021-10-28 08:59:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:59:07,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233890481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:07,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:59:07,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-10-28 08:59:07,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110934511] [2021-10-28 08:59:07,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 08:59:07,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:07,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 08:59:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3593, Unknown=15, NotChecked=0, Total=3782 [2021-10-28 08:59:07,419 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 62 states, 61 states have (on average 1.7377049180327868) internal successors, (106), 48 states have internal predecessors, (106), 8 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 08:59:38,164 WARN L207 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-10-28 09:00:02,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:00:02,686 INFO L93 Difference]: Finished difference Result 159 states and 174 transitions. [2021-10-28 09:00:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 09:00:02,687 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.7377049180327868) internal successors, (106), 48 states have internal predecessors, (106), 8 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) Word has length 69 [2021-10-28 09:00:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:00:02,689 INFO L225 Difference]: With dead ends: 159 [2021-10-28 09:00:02,689 INFO L226 Difference]: Without dead ends: 159 [2021-10-28 09:00:02,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=546, Invalid=7995, Unknown=15, NotChecked=0, Total=8556 [2021-10-28 09:00:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-28 09:00:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2021-10-28 09:00:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.3118279569892473) internal successors, (122), 108 states have internal predecessors, (122), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:00:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2021-10-28 09:00:02,698 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 69 [2021-10-28 09:00:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:00:02,698 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2021-10-28 09:00:02,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.7377049180327868) internal successors, (106), 48 states have internal predecessors, (106), 8 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 09:00:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2021-10-28 09:00:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-28 09:00:02,700 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:00:02,700 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, 1, 1, 1, 1] [2021-10-28 09:00:02,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:00:02,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 09:00:02,902 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting dll_circular_get_data_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:00:02,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:00:02,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2091282612, now seen corresponding path program 2 times [2021-10-28 09:00:02,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:00:02,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399680833] [2021-10-28 09:00:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:02,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:00:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:03,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:00:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:03,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:00:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:03,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:00:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:03,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:00:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:03,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:00:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:03,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:00:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 09:00:03,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:00:03,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399680833] [2021-10-28 09:00:03,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399680833] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:00:03,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:00:03,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 09:00:03,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979132977] [2021-10-28 09:00:03,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:00:03,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:00:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:00:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:00:03,151 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 09:00:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:00:03,734 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2021-10-28 09:00:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:00:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2021-10-28 09:00:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:00:03,736 INFO L225 Difference]: With dead ends: 132 [2021-10-28 09:00:03,737 INFO L226 Difference]: Without dead ends: 132 [2021-10-28 09:00:03,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:00:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-28 09:00:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 113. [2021-10-28 09:00:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 94 states have internal predecessors, (100), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:00:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2021-10-28 09:00:03,745 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 72 [2021-10-28 09:00:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:00:03,746 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2021-10-28 09:00:03,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 09:00:03,746 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2021-10-28 09:00:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 09:00:03,748 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:00:03,748 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:00:03,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-28 09:00:03,748 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:00:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:00:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1548802744, now seen corresponding path program 1 times [2021-10-28 09:00:03,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:00:03,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419068806] [2021-10-28 09:00:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:03,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:00:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:04,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:00:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:04,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:00:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:04,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:00:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:04,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:00:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:05,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:00:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:05,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:00:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:05,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:00:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:00:06,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:00:06,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419068806] [2021-10-28 09:00:06,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419068806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:06,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925381372] [2021-10-28 09:00:06,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:06,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:06,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:00:06,190 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:00:06,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:00:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:06,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 121 conjunts are in the unsatisfiable core [2021-10-28 09:00:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:00:06,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:00:07,333 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:00:07,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:00:07,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:00:07,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:00:07,923 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-28 09:00:07,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-28 09:00:10,051 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 63 treesize of output 59 [2021-10-28 09:00:10,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:00:10,096 INFO L354 Elim1Store]: treesize reduction 128, result has 15.2 percent of original size [2021-10-28 09:00:10,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 52 [2021-10-28 09:00:20,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-28 09:00:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:00:20,347 INFO L354 Elim1Store]: treesize reduction 256, result has 20.2 percent of original size [2021-10-28 09:00:20,347 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 151 treesize of output 148 [2021-10-28 09:00:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:00:20,381 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-28 09:00:20,382 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 152 treesize of output 129 [2021-10-28 09:00:22,922 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~data Int) (dll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_int| (store |c_old(#memory_int)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_int)| |c_dll_circular_update_at_#in~head.base|) .cse0 dll_circular_update_at_~data))) (= (store |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_dll_circular_update_at_#in~head.base|) .cse0))) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-10-28 09:00:22,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:00:23,042 INFO L354 Elim1Store]: treesize reduction 148, result has 16.9 percent of original size [2021-10-28 09:00:23,042 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 136 treesize of output 111 [2021-10-28 09:00:23,065 INFO L354 Elim1Store]: treesize reduction 65, result has 22.6 percent of original size [2021-10-28 09:00:23,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 116 [2021-10-28 09:00:23,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:00:23,091 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-10-28 09:00:23,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 81 [2021-10-28 09:00:27,292 INFO L354 Elim1Store]: treesize reduction 144, result has 43.1 percent of original size [2021-10-28 09:00:27,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 196 treesize of output 230 [2021-10-28 09:00:27,352 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-10-28 09:00:27,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 218 treesize of output 166 [2021-10-28 09:00:27,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:00:27,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 164 [2021-10-28 09:00:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2021-10-28 09:00:29,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925381372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:29,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:00:29,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 69 [2021-10-28 09:00:29,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259916886] [2021-10-28 09:00:29,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-10-28 09:00:29,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:00:29,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-10-28 09:00:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4382, Unknown=1, NotChecked=132, Total=4692 [2021-10-28 09:00:29,061 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 69 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 57 states have internal predecessors, (108), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 09:00:47,931 WARN L207 SmtUtils]: Spent 8.15 s on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-10-28 09:01:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:20,472 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2021-10-28 09:01:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 09:01:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 57 states have internal predecessors, (108), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) Word has length 75 [2021-10-28 09:01:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:20,473 INFO L225 Difference]: With dead ends: 136 [2021-10-28 09:01:20,473 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 09:01:20,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 64.8s TimeCoverageRelationStatistics Valid=525, Invalid=9973, Unknown=12, NotChecked=202, Total=10712 [2021-10-28 09:01:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 09:01:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2021-10-28 09:01:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 94 states have internal predecessors, (99), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:01:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2021-10-28 09:01:20,481 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 75 [2021-10-28 09:01:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:20,482 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2021-10-28 09:01:20,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 57 states have internal predecessors, (108), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 09:01:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2021-10-28 09:01:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 09:01:20,483 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:20,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:01:20,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-28 09:01:20,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:01:20,690 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:01:20,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:20,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1976079515, now seen corresponding path program 1 times [2021-10-28 09:01:20,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:20,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703028726] [2021-10-28 09:01:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:20,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:21,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:21,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:01:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:21,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:01:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:21,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:01:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:21,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:01:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:21,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:01:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:21,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:01:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:21,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:01:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:01:21,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:21,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703028726] [2021-10-28 09:01:21,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703028726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:21,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78808911] [2021-10-28 09:01:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:21,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:21,618 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:21,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:01:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 09:01:22,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:22,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:01:23,510 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 09:01:23,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 09:01:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 09:01:23,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78808911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:23,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:23,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17] total 40 [2021-10-28 09:01:23,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89466705] [2021-10-28 09:01:23,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 09:01:23,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:23,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 09:01:23,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 09:01:23,562 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand has 40 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 35 states have internal predecessors, (114), 10 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-10-28 09:01:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:28,130 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-10-28 09:01:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 09:01:28,130 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 35 states have internal predecessors, (114), 10 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) Word has length 86 [2021-10-28 09:01:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:28,132 INFO L225 Difference]: With dead ends: 142 [2021-10-28 09:01:28,132 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 09:01:28,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=344, Invalid=3688, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 09:01:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 09:01:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 119. [2021-10-28 09:01:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 99 states have internal predecessors, (104), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 09:01:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-10-28 09:01:28,140 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 86 [2021-10-28 09:01:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:28,141 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-10-28 09:01:28,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 35 states have internal predecessors, (114), 10 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-10-28 09:01:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-10-28 09:01:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 09:01:28,143 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:28,143 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:01:28,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:01:28,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:01:28,358 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:01:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash -151362542, now seen corresponding path program 2 times [2021-10-28 09:01:28,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:28,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165041179] [2021-10-28 09:01:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:28,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:28,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:28,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:01:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:28,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:01:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:28,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:01:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:28,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:01:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:28,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:01:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:28,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:01:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:28,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:01:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-28 09:01:28,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:28,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165041179] [2021-10-28 09:01:28,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165041179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:28,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103495203] [2021-10-28 09:01:28,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:01:28,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:28,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:28,658 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:28,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:01:29,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:01:29,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:01:29,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:01:29,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-28 09:01:29,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103495203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:29,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:29,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2021-10-28 09:01:29,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021909117] [2021-10-28 09:01:29,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:01:29,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:29,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:01:29,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:01:29,817 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-28 09:01:30,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:30,360 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2021-10-28 09:01:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:01:30,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 89 [2021-10-28 09:01:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:30,368 INFO L225 Difference]: With dead ends: 134 [2021-10-28 09:01:30,368 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 09:01:30,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:01:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 09:01:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 108. [2021-10-28 09:01:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 89 states have internal predecessors, (93), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:01:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-10-28 09:01:30,373 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 89 [2021-10-28 09:01:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:30,373 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-10-28 09:01:30,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-28 09:01:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-10-28 09:01:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 09:01:30,375 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:30,375 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, 1, 1, 1, 1, 1, 1] [2021-10-28 09:01:30,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:01:30,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:30,588 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting dll_circular_destroyErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:01:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash -460436575, now seen corresponding path program 1 times [2021-10-28 09:01:30,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:30,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474547492] [2021-10-28 09:01:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:30,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:30,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:01:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:30,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:01:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:01:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:30,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:01:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:30,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:01:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:30,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:01:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:30,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:01:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:01:30,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:30,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474547492] [2021-10-28 09:01:30,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474547492] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:01:30,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:01:30,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 09:01:30,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888343290] [2021-10-28 09:01:30,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:01:30,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:30,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:01:30,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:01:30,783 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-10-28 09:01:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:31,454 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2021-10-28 09:01:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:01:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 91 [2021-10-28 09:01:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:31,457 INFO L225 Difference]: With dead ends: 128 [2021-10-28 09:01:31,457 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 09:01:31,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:01:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 09:01:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2021-10-28 09:01:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 92 states have internal predecessors, (99), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:01:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2021-10-28 09:01:31,462 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 91 [2021-10-28 09:01:31,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:31,463 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2021-10-28 09:01:31,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-10-28 09:01:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2021-10-28 09:01:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 09:01:31,464 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:31,465 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, 1, 1, 1, 1, 1, 1] [2021-10-28 09:01:31,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 09:01:31,465 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting dll_circular_destroyErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:01:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash -460436574, now seen corresponding path program 1 times [2021-10-28 09:01:31,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:31,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97562241] [2021-10-28 09:01:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:31,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:01:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:01:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:01:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:01:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:01:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:01:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:01:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:01:31,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:31,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97562241] [2021-10-28 09:01:31,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97562241] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:01:31,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:01:31,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 09:01:31,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463895384] [2021-10-28 09:01:31,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:01:31,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:01:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:01:31,927 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 09:01:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:32,733 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-10-28 09:01:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:01:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 91 [2021-10-28 09:01:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:32,734 INFO L225 Difference]: With dead ends: 122 [2021-10-28 09:01:32,735 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 09:01:32,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:01:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 09:01:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-10-28 09:01:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 90 states have internal predecessors, (96), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:01:32,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-10-28 09:01:32,741 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 91 [2021-10-28 09:01:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:32,741 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-10-28 09:01:32,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 09:01:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-10-28 09:01:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 09:01:32,743 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:32,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:01:32,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-28 09:01:32,744 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting dll_circular_destroyErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:01:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1259673929, now seen corresponding path program 1 times [2021-10-28 09:01:32,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:32,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865760118] [2021-10-28 09:01:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:32,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:32,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:32,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:01:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:32,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:01:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:32,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:01:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:32,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:01:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:32,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:01:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:32,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:01:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:33,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:01:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 09:01:33,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:33,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865760118] [2021-10-28 09:01:33,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865760118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:33,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446513091] [2021-10-28 09:01:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:33,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:33,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:33,046 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:33,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:01:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 09:01:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:35,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-28 09:01:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 09:01:35,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446513091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:35,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:35,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 25 [2021-10-28 09:01:35,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093373419] [2021-10-28 09:01:35,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:01:35,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:35,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:01:35,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:01:35,036 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 26 states, 25 states have (on average 4.0) internal successors, (100), 19 states have internal predecessors, (100), 4 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-28 09:01:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:36,636 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-10-28 09:01:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:01:36,637 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.0) internal successors, (100), 19 states have internal predecessors, (100), 4 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 94 [2021-10-28 09:01:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:36,638 INFO L225 Difference]: With dead ends: 122 [2021-10-28 09:01:36,638 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 09:01:36,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:01:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 09:01:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-10-28 09:01:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 90 states have internal predecessors, (97), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:01:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2021-10-28 09:01:36,643 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 94 [2021-10-28 09:01:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:36,644 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2021-10-28 09:01:36,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.0) internal successors, (100), 19 states have internal predecessors, (100), 4 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-28 09:01:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2021-10-28 09:01:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 09:01:36,646 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:36,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:01:36,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:01:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 09:01:36,874 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting dll_circular_destroyErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:01:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1259673930, now seen corresponding path program 1 times [2021-10-28 09:01:36,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:36,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910219361] [2021-10-28 09:01:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:36,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:37,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:37,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:01:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:37,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:01:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:37,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:01:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:37,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:01:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:37,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:01:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:38,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:01:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:38,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:01:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:01:38,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:38,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910219361] [2021-10-28 09:01:38,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910219361] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:38,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282621899] [2021-10-28 09:01:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:38,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:38,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:38,405 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:38,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:01:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 116 conjunts are in the unsatisfiable core [2021-10-28 09:01:39,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:39,533 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 [2021-10-28 09:01:40,130 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:01:40,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:01:40,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:01:40,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:01:40,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 46 [2021-10-28 09:01:40,458 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 52 treesize of output 51 [2021-10-28 09:01:40,722 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-10-28 09:01:40,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 72 [2021-10-28 09:01:40,736 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 09:01:40,737 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 1 case distinctions, treesize of input 66 treesize of output 59 [2021-10-28 09:01:40,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:01:40,923 INFO L354 Elim1Store]: treesize reduction 138, result has 15.3 percent of original size [2021-10-28 09:01:40,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 102 [2021-10-28 09:01:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:01:40,960 INFO L354 Elim1Store]: treesize reduction 136, result has 16.6 percent of original size [2021-10-28 09:01:40,960 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 111 [2021-10-28 09:01:43,748 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.offset)| .cse0 (let ((.cse1 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))))))) is different from true [2021-10-28 09:01:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:01:43,781 INFO L354 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2021-10-28 09:01:43,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 86 [2021-10-28 09:01:43,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:01:43,851 INFO L354 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2021-10-28 09:01:43,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 67 [2021-10-28 09:01:45,359 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= (store |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_dll_circular_update_at_#in~head.base|) .cse0)))) |c_#memory_$Pointer$.offset|))) is different from true [2021-10-28 09:01:45,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:01:45,429 INFO L354 Elim1Store]: treesize reduction 186, result has 14.3 percent of original size [2021-10-28 09:01:45,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 59 [2021-10-28 09:01:55,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2021-10-28 09:01:55,164 INFO L354 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2021-10-28 09:01:55,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 42 [2021-10-28 09:01:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2021-10-28 09:01:55,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282621899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:55,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:55,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 73 [2021-10-28 09:01:55,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635310914] [2021-10-28 09:01:55,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-10-28 09:01:55,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-10-28 09:01:55,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4888, Unknown=3, NotChecked=282, Total=5402 [2021-10-28 09:01:55,371 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 74 states, 73 states have (on average 1.9452054794520548) internal successors, (142), 59 states have internal predecessors, (142), 10 states have call successors, (19), 11 states have call predecessors, (19), 14 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) [2021-10-28 09:02:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:15,755 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-10-28 09:02:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 09:02:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.9452054794520548) internal successors, (142), 59 states have internal predecessors, (142), 10 states have call successors, (19), 11 states have call predecessors, (19), 14 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) Word has length 94 [2021-10-28 09:02:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:15,757 INFO L225 Difference]: With dead ends: 119 [2021-10-28 09:02:15,757 INFO L226 Difference]: Without dead ends: 119 [2021-10-28 09:02:15,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=689, Invalid=10446, Unknown=3, NotChecked=418, Total=11556 [2021-10-28 09:02:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-28 09:02:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-10-28 09:02:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 92 states have internal predecessors, (98), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:02:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2021-10-28 09:02:15,765 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 94 [2021-10-28 09:02:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:15,766 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2021-10-28 09:02:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.9452054794520548) internal successors, (142), 59 states have internal predecessors, (142), 10 states have call successors, (19), 11 states have call predecessors, (19), 14 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) [2021-10-28 09:02:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2021-10-28 09:02:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 09:02:15,768 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:15,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:02:15,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:02:15,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 09:02:15,981 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:02:15,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:15,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1292164669, now seen corresponding path program 1 times [2021-10-28 09:02:15,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:15,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318120940] [2021-10-28 09:02:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:15,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:02:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:02:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:02:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:02:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:02:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:02:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:02:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-10-28 09:02:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:02:16,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:16,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318120940] [2021-10-28 09:02:16,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318120940] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:02:16,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:02:16,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-28 09:02:16,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068516625] [2021-10-28 09:02:16,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 09:02:16,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:02:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:02:16,339 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 09:02:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:16,916 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2021-10-28 09:02:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:02:16,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2021-10-28 09:02:16,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:16,918 INFO L225 Difference]: With dead ends: 117 [2021-10-28 09:02:16,918 INFO L226 Difference]: Without dead ends: 115 [2021-10-28 09:02:16,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:02:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-28 09:02:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-10-28 09:02:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.127906976744186) internal successors, (97), 92 states have internal predecessors, (97), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:02:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2021-10-28 09:02:16,924 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 94 [2021-10-28 09:02:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:16,925 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2021-10-28 09:02:16,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 10 states have internal predecessors, (60), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 09:02:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2021-10-28 09:02:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 09:02:16,926 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:16,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:02:16,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-28 09:02:16,927 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:02:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 395184808, now seen corresponding path program 1 times [2021-10-28 09:02:16,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:16,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65892151] [2021-10-28 09:02:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:16,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:17,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:02:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:17,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:02:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:17,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:02:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:17,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:02:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:17,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:02:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:17,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:02:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:17,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:02:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:02:17,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:17,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65892151] [2021-10-28 09:02:17,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65892151] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:02:17,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:02:17,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 09:02:17,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855707079] [2021-10-28 09:02:17,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:02:17,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:17,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:02:17,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:02:17,265 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 9 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 09:02:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:18,020 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2021-10-28 09:02:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:02:18,021 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 9 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 95 [2021-10-28 09:02:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:18,021 INFO L225 Difference]: With dead ends: 113 [2021-10-28 09:02:18,022 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 09:02:18,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:02:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 09:02:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-10-28 09:02:18,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 91 states have internal predecessors, (95), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:02:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-10-28 09:02:18,026 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 95 [2021-10-28 09:02:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:18,027 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-10-28 09:02:18,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 9 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 09:02:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-10-28 09:02:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-28 09:02:18,029 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:18,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:02:18,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-28 09:02:18,030 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:02:18,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:18,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1816902701, now seen corresponding path program 1 times [2021-10-28 09:02:18,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:18,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26481953] [2021-10-28 09:02:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:18,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:18,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:18,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:02:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:02:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:18,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:02:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:19,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:02:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:19,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:02:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:19,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:02:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:02:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 09:02:19,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:19,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26481953] [2021-10-28 09:02:19,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26481953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:19,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101550951] [2021-10-28 09:02:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:19,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:19,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:02:19,530 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:02:19,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:02:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-28 09:02:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:02:20,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:02:21,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 09:02:21,329 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:02:21,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:02:21,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:02:21,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:02:21,981 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-10-28 09:02:21,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 37 [2021-10-28 09:02:22,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:02:22,096 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-28 09:02:22,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-10-28 09:02:22,634 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-28 09:02:22,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 23 [2021-10-28 09:02:23,912 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (= (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.base)| .cse0 (let ((.cse1 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))) |c_#memory_$Pointer$.base|)) is different from true [2021-10-28 09:02:23,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:02:24,004 INFO L354 Elim1Store]: treesize reduction 130, result has 19.8 percent of original size [2021-10-28 09:02:24,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 63 [2021-10-28 09:02:24,165 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-28 09:02:24,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2021-10-28 09:02:25,555 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-10-28 09:02:25,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:02:25,596 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-10-28 09:02:25,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 30 [2021-10-28 09:02:27,027 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-28 09:02:27,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-10-28 09:02:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-10-28 09:02:27,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101550951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:27,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:02:27,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2021-10-28 09:02:27,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939002183] [2021-10-28 09:02:27,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-28 09:02:27,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-28 09:02:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2694, Unknown=2, NotChecked=210, Total=3080 [2021-10-28 09:02:27,125 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 43 states have internal predecessors, (125), 8 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-28 09:02:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:41,852 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2021-10-28 09:02:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 09:02:41,853 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 43 states have internal predecessors, (125), 8 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 97 [2021-10-28 09:02:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:41,854 INFO L225 Difference]: With dead ends: 114 [2021-10-28 09:02:41,854 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 09:02:41,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=476, Invalid=5382, Unknown=2, NotChecked=302, Total=6162 [2021-10-28 09:02:41,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 09:02:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-10-28 09:02:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.103448275862069) internal successors, (96), 92 states have internal predecessors, (96), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:02:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-10-28 09:02:41,858 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 97 [2021-10-28 09:02:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:41,859 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-10-28 09:02:41,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 43 states have internal predecessors, (125), 8 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-28 09:02:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-10-28 09:02:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-28 09:02:41,860 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:41,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:02:41,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:02:42,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 09:02:42,061 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting dll_circular_destroyErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:02:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:42,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2124251826, now seen corresponding path program 1 times [2021-10-28 09:02:42,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:42,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046986048] [2021-10-28 09:02:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:42,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:42,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:42,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:02:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:43,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:02:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:43,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:02:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:43,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:02:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:43,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:02:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:44,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:02:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:44,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:02:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 09:02:44,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:44,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046986048] [2021-10-28 09:02:44,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046986048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:44,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669674952] [2021-10-28 09:02:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:44,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:44,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:02:44,328 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:02:44,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:02:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:45,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 133 conjunts are in the unsatisfiable core [2021-10-28 09:02:45,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:02:45,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:02:46,035 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:02:46,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:02:46,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:02:46,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 09:02:46,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-10-28 09:02:46,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:02:46,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:02:46,530 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 72 treesize of output 71 [2021-10-28 09:02:46,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:02:46,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 09:02:46,551 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 09:02:46,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 60 [2021-10-28 09:02:49,368 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|)) (.cse1 (+ dll_circular_update_at_~head.offset 8))) (and (= (store |c_old(#memory_$Pointer$.base)| .cse0 (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))) |c_#memory_$Pointer$.base|) (<= (select (select |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|) dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| .cse0 (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))))))) is different from true [2021-10-28 09:02:49,485 INFO L354 Elim1Store]: treesize reduction 189, result has 18.9 percent of original size [2021-10-28 09:02:49,485 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 7 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 118 [2021-10-28 09:02:49,519 INFO L354 Elim1Store]: treesize reduction 132, result has 19.5 percent of original size [2021-10-28 09:02:49,519 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 110 treesize of output 94 [2021-10-28 09:02:51,751 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= (store |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_dll_circular_update_at_#in~head.base|) .cse0))) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-10-28 09:02:51,848 INFO L354 Elim1Store]: treesize reduction 136, result has 17.6 percent of original size [2021-10-28 09:02:51,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 115 [2021-10-28 09:02:51,880 INFO L354 Elim1Store]: treesize reduction 110, result has 19.1 percent of original size [2021-10-28 09:02:51,880 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 128 treesize of output 106 [2021-10-28 09:02:56,051 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-10-28 09:02:56,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 135 treesize of output 104 [2021-10-28 09:02:56,079 INFO L354 Elim1Store]: treesize reduction 52, result has 18.8 percent of original size [2021-10-28 09:02:56,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 72 [2021-10-28 09:02:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-10-28 09:02:56,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669674952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:56,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:02:56,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 66 [2021-10-28 09:02:56,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314789988] [2021-10-28 09:02:56,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 09:02:56,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:56,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 09:02:56,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3847, Unknown=2, NotChecked=250, Total=4290 [2021-10-28 09:02:56,621 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 54 states have internal predecessors, (134), 8 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-28 09:03:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:10,530 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-10-28 09:03:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 09:03:10,531 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 54 states have internal predecessors, (134), 8 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) Word has length 100 [2021-10-28 09:03:10,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:10,532 INFO L225 Difference]: With dead ends: 100 [2021-10-28 09:03:10,532 INFO L226 Difference]: Without dead ends: 100 [2021-10-28 09:03:10,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=525, Invalid=7313, Unknown=2, NotChecked=350, Total=8190 [2021-10-28 09:03:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-28 09:03:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-28 09:03:10,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:03:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-10-28 09:03:10,538 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 100 [2021-10-28 09:03:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:10,539 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-10-28 09:03:10,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 54 states have internal predecessors, (134), 8 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-28 09:03:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-10-28 09:03:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-28 09:03:10,541 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:10,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:10,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-28 09:03:10,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 09:03:10,754 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:03:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:10,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1296580098, now seen corresponding path program 1 times [2021-10-28 09:03:10,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:10,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511072514] [2021-10-28 09:03:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:10,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:11,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:11,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:03:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:11,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:03:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:11,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:03:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:11,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:03:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:12,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:03:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:12,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:03:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:12,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:03:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 09:03:12,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:12,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511072514] [2021-10-28 09:03:12,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511072514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:12,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473305427] [2021-10-28 09:03:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:12,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:12,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:12,304 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:12,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:03:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:13,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:03:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:14,263 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:03:14,264 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 20 treesize of output 26 [2021-10-28 09:03:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 09:03:14,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473305427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:14,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:14,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 7] total 40 [2021-10-28 09:03:14,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716964244] [2021-10-28 09:03:14,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 09:03:14,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 09:03:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:03:14,479 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 41 states, 40 states have (on average 3.175) internal successors, (127), 34 states have internal predecessors, (127), 5 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-10-28 09:03:16,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:16,892 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2021-10-28 09:03:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:03:16,892 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.175) internal successors, (127), 34 states have internal predecessors, (127), 5 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 102 [2021-10-28 09:03:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:16,893 INFO L225 Difference]: With dead ends: 99 [2021-10-28 09:03:16,893 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 09:03:16,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=320, Invalid=3340, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 09:03:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 09:03:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-28 09:03:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 09:03:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-10-28 09:03:16,897 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 102 [2021-10-28 09:03:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:16,898 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-10-28 09:03:16,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.175) internal successors, (127), 34 states have internal predecessors, (127), 5 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-10-28 09:03:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-10-28 09:03:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 09:03:16,899 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:16,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:16,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:17,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 09:03:17,114 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-10-28 09:03:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:17,114 INFO L85 PathProgramCache]: Analyzing trace with hash 760636950, now seen corresponding path program 1 times [2021-10-28 09:03:17,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:17,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345804812] [2021-10-28 09:03:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:17,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:17,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:17,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:03:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:17,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:03:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:17,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 09:03:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:18,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-10-28 09:03:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:18,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-10-28 09:03:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:18,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-10-28 09:03:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:18,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-28 09:03:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:18,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-10-28 09:03:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-28 09:03:19,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:19,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345804812] [2021-10-28 09:03:19,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345804812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:19,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423856417] [2021-10-28 09:03:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:19,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:19,013 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:19,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:03:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:20,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-28 09:03:20,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:21,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:03:21,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:03:21,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:03:21,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:03:21,569 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-28 09:03:21,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-28 09:03:21,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:03:21,698 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-28 09:03:21,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 56 [2021-10-28 09:03:22,318 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-28 09:03:22,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 39 [2021-10-28 09:03:22,342 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-10-28 09:03:22,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 21 [2021-10-28 09:03:39,250 INFO L354 Elim1Store]: treesize reduction 130, result has 18.8 percent of original size [2021-10-28 09:03:39,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 92 treesize of output 81 [2021-10-28 09:03:41,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:03:41,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 33 [2021-10-28 09:03:41,258 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-10-28 09:03:41,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 21 [2021-10-28 09:03:43,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 42 [2021-10-28 09:03:44,635 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 09:03:44,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 40 [2021-10-28 09:03:48,780 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 09:03:48,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 40 [2021-10-28 09:03:52,822 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 09:03:52,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 40 [2021-10-28 09:03:52,827 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:03:52,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2021-10-28 09:04:00,030 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-10-28 09:04:00,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 66 [2021-10-28 09:04:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 10 refuted. 2 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 09:04:02,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423856417] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:02,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:02,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 65 [2021-10-28 09:04:02,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801098812] [2021-10-28 09:04:02,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 09:04:02,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:02,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 09:04:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4087, Unknown=14, NotChecked=0, Total=4290 [2021-10-28 09:04:02,270 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 66 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 55 states have internal predecessors, (147), 10 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2021-10-28 09:05:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:52,646 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-10-28 09:05:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 09:05:52,647 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 55 states have internal predecessors, (147), 10 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) Word has length 106 [2021-10-28 09:05:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:52,647 INFO L225 Difference]: With dead ends: 98 [2021-10-28 09:05:52,647 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:05:52,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 85 SyntacticMatches, 7 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 87.8s TimeCoverageRelationStatistics Valid=524, Invalid=8379, Unknown=27, NotChecked=0, Total=8930 [2021-10-28 09:05:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:05:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:05:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:05:52,648 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2021-10-28 09:05:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:52,649 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:05:52,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 55 states have internal predecessors, (147), 10 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2021-10-28 09:05:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:05:52,649 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:05:52,652 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr0REQUIRES_VIOLATION [2021-10-28 09:05:52,652 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr1REQUIRES_VIOLATION [2021-10-28 09:05:52,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr2REQUIRES_VIOLATION [2021-10-28 09:05:52,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr3REQUIRES_VIOLATION [2021-10-28 09:05:52,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr4REQUIRES_VIOLATION [2021-10-28 09:05:52,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr5REQUIRES_VIOLATION [2021-10-28 09:05:52,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr6REQUIRES_VIOLATION [2021-10-28 09:05:52,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr7REQUIRES_VIOLATION [2021-10-28 09:05:52,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr0REQUIRES_VIOLATION [2021-10-28 09:05:52,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr1REQUIRES_VIOLATION [2021-10-28 09:05:52,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr2REQUIRES_VIOLATION [2021-10-28 09:05:52,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr3REQUIRES_VIOLATION [2021-10-28 09:05:52,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr0REQUIRES_VIOLATION [2021-10-28 09:05:52,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr1REQUIRES_VIOLATION [2021-10-28 09:05:52,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr2REQUIRES_VIOLATION [2021-10-28 09:05:52,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr3REQUIRES_VIOLATION [2021-10-28 09:05:52,656 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-28 09:05:52,656 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-28 09:05:52,656 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-28 09:05:52,656 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-28 09:05:52,656 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr4REQUIRES_VIOLATION [2021-10-28 09:05:52,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr5REQUIRES_VIOLATION [2021-10-28 09:05:52,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:05:52,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:05:52,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr0REQUIRES_VIOLATION [2021-10-28 09:05:52,658 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr1REQUIRES_VIOLATION [2021-10-28 09:05:52,658 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr2REQUIRES_VIOLATION [2021-10-28 09:05:52,658 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr3REQUIRES_VIOLATION [2021-10-28 09:05:52,658 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:05:52,658 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:05:52,659 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:05:52,659 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:05:52,659 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:05:52,659 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:05:52,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:52,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 09:05:52,881 INFO L731 BasicCegarLoop]: Path program histogram: [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] [2021-10-28 09:05:52,884 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:05:52,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:05:52 BoogieIcfgContainer [2021-10-28 09:05:52,887 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:05:52,888 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:05:52,888 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:05:52,888 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:05:52,889 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:57:15" (3/4) ... [2021-10-28 09:05:52,893 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:05:52,902 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 09:05:52,902 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 09:05:52,902 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-28 09:05:52,902 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_destroy [2021-10-28 09:05:52,902 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 09:05:52,903 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 09:05:52,903 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 09:05:52,903 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_create [2021-10-28 09:05:52,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_update_at [2021-10-28 09:05:52,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-28 09:05:52,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_get_data_at [2021-10-28 09:05:52,912 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-10-28 09:05:52,912 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-28 09:05:52,913 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 09:05:52,913 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:05:52,967 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:05:52,968 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:05:52,969 INFO L168 Benchmark]: Toolchain (without parser) took 519395.55 ms. Allocated memory was 148.9 MB in the beginning and 262.1 MB in the end (delta: 113.2 MB). Free memory was 116.1 MB in the beginning and 68.8 MB in the end (delta: 47.3 MB). Peak memory consumption was 159.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:05:52,969 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 100.7 MB. Free memory is still 55.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:05:52,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 550.61 ms. Allocated memory is still 148.9 MB. Free memory was 115.7 MB in the beginning and 117.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:05:52,970 INFO L168 Benchmark]: Boogie Preprocessor took 78.30 ms. Allocated memory is still 148.9 MB. Free memory was 117.1 MB in the beginning and 114.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:05:52,971 INFO L168 Benchmark]: RCFGBuilder took 918.36 ms. Allocated memory is still 148.9 MB. Free memory was 114.1 MB in the beginning and 88.9 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:05:52,971 INFO L168 Benchmark]: TraceAbstraction took 517759.08 ms. Allocated memory was 148.9 MB in the beginning and 262.1 MB in the end (delta: 113.2 MB). Free memory was 88.5 MB in the beginning and 73.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 130.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:05:52,971 INFO L168 Benchmark]: Witness Printer took 80.03 ms. Allocated memory is still 262.1 MB. Free memory was 73.7 MB in the beginning and 68.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:05:52,973 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 100.7 MB. Free memory is still 55.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 550.61 ms. Allocated memory is still 148.9 MB. Free memory was 115.7 MB in the beginning and 117.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 78.30 ms. Allocated memory is still 148.9 MB. Free memory was 117.1 MB in the beginning and 114.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 918.36 ms. Allocated memory is still 148.9 MB. Free memory was 114.1 MB in the beginning and 88.9 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 517759.08 ms. Allocated memory was 148.9 MB in the beginning and 262.1 MB in the end (delta: 113.2 MB). Free memory was 88.5 MB in the beginning and 73.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 130.5 MB. Max. memory is 16.1 GB. * Witness Printer took 80.03 ms. Allocated memory is still 262.1 MB. Free memory was 73.7 MB in the beginning and 68.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 590]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 590]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 621]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 621]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 624]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 624]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 614]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 614]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 643]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 626]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 124 locations, 34 error locations. Started 1 CEGAR loops. OverallTime: 517.6s, OverallIterations: 40, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 305.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2623 SDtfs, 7492 SDslu, 13558 SDs, 0 SdLazy, 47400 SolverSat, 1867 SolverUnsat, 53 SolverUnknown, 0 SolverNotchecked, 130.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2776 GetRequests, 1437 SyntacticMatches, 39 SemanticMatches, 1300 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 13586 ImplicationChecksByTransitivity, 318.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=17, InterpolantAutomatonStates: 679, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 40 MinimizatonAttempts, 727 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 190.9s InterpolantComputationTime, 3813 NumberOfCodeBlocks, 3813 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 3752 ConstructedInterpolants, 268 QuantifiedInterpolants, 47411 SizeOfPredicates, 273 NumberOfNonLiveVariables, 7630 ConjunctsInSsa, 1103 ConjunctsInUnsatCore, 61 InterpolantComputations, 21 PerfectInterpolantSequences, 856/1262 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 34 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:05:53,213 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-28 09:05:53,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0500f93c-36e5-40d8-86c2-dc3af2c7f9db/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...