./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:43:25,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:43:25,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:43:25,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:43:25,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:43:25,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:43:25,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:43:25,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:43:25,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:43:25,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:43:25,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:43:25,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:43:25,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:43:25,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:43:25,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:43:25,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:43:25,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:43:25,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:43:25,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:43:25,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:43:25,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:43:25,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:43:25,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:43:25,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:43:26,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:43:26,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:43:26,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:43:26,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:43:26,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:43:26,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:43:26,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:43:26,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:43:26,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:43:26,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:43:26,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:43:26,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:43:26,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:43:26,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:43:26,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:43:26,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:43:26,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:43:26,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-21 19:43:26,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:43:26,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:43:26,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:43:26,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:43:26,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:43:26,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:43:26,073 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:43:26,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:43:26,074 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:43:26,074 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:43:26,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:43:26,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:43:26,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:43:26,076 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:43:26,076 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:43:26,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:43:26,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:43:26,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:43:26,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:43:26,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:43:26,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:43:26,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:43:26,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:43:26,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:43:26,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:43:26,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:43:26,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:43:26,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:43:26,078 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_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 [2021-10-21 19:43:26,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:43:26,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:43:26,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:43:26,457 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:43:26,458 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:43:26,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-21 19:43:26,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/data/caeac7b44/3b2a03da87444755981573e16f1e3fda/FLAG93b138d79 [2021-10-21 19:43:27,110 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:43:27,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-21 19:43:27,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/data/caeac7b44/3b2a03da87444755981573e16f1e3fda/FLAG93b138d79 [2021-10-21 19:43:27,422 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/data/caeac7b44/3b2a03da87444755981573e16f1e3fda [2021-10-21 19:43:27,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:43:27,425 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:43:27,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:43:27,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:43:27,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:43:27,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:27,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405b3dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27, skipping insertion in model container [2021-10-21 19:43:27,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:27,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:43:27,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:43:27,861 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_490b7223-2a00-43e7-9b4a-2a1aebf78a76/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-21 19:43:27,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:43:27,885 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:43:27,955 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_490b7223-2a00-43e7-9b4a-2a1aebf78a76/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-21 19:43:27,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:43:27,986 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:43:27,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27 WrapperNode [2021-10-21 19:43:27,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:43:27,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:43:27,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:43:27,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:43:28,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:28,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:28,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:28,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:28,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:28,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:28,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:28,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:43:28,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:43:28,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:43:28,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:43:28,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27" (1/1) ... [2021-10-21 19:43:28,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:43:28,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:43:28,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:43:28,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:43:28,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:43:28,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:43:28,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:43:28,152 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:43:28,152 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-10-21 19:43:28,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:43:28,153 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:43:28,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:43:28,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:43:28,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:43:28,154 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:43:28,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:43:28,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:43:28,154 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:43:28,154 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:43:28,154 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:43:28,155 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:43:28,155 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:43:28,155 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:43:28,155 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:43:28,155 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:43:28,155 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:43:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:43:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:43:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:43:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:43:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:43:28,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:43:28,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:43:28,157 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:43:28,157 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:43:28,157 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:43:28,157 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:43:28,157 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:43:28,158 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:43:28,158 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:43:28,158 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:43:28,158 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:43:28,158 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:43:28,158 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:43:28,159 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:43:28,159 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:43:28,159 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:43:28,159 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:43:28,159 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:43:28,159 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:43:28,160 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:43:28,160 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:43:28,160 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:43:28,160 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:43:28,160 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:43:28,160 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:43:28,161 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:43:28,161 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:43:28,161 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:43:28,161 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:43:28,161 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:43:28,161 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:43:28,162 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:43:28,162 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:43:28,162 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:43:28,162 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:43:28,162 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:43:28,162 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:43:28,163 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:43:28,163 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:43:28,163 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:43:28,163 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:43:28,163 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:43:28,163 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:43:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:43:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:43:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:43:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:43:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:43:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:43:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:43:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:43:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:43:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:43:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:43:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:43:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:43:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:43:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:43:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:43:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:43:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:43:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:43:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:43:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:43:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:43:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:43:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:43:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:43:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:43:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:43:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:43:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:43:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:43:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:43:28,169 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:43:28,169 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:43:28,169 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:43:28,169 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:43:28,169 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:43:28,169 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:43:28,169 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:43:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:43:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:43:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:43:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:43:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:43:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:43:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:43:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:43:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:43:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:43:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-10-21 19:43:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:43:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:43:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:43:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:43:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:43:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:43:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:43:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:43:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:43:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:43:28,445 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:43:28,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:43:28,799 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 19:43:28,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:43:28 BoogieIcfgContainer [2021-10-21 19:43:28,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:43:28,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:43:28,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:43:28,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:43:28,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:43:27" (1/3) ... [2021-10-21 19:43:28,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a348bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:43:28, skipping insertion in model container [2021-10-21 19:43:28,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:27" (2/3) ... [2021-10-21 19:43:28,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a348bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:43:28, skipping insertion in model container [2021-10-21 19:43:28,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:43:28" (3/3) ... [2021-10-21 19:43:28,810 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2021-10-21 19:43:28,814 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:43:28,814 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2021-10-21 19:43:28,856 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:43:28,862 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:43:28,863 INFO L340 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2021-10-21 19:43:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 91 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:43:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:43:28,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:28,888 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:28,888 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_createErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2056030063, now seen corresponding path program 1 times [2021-10-21 19:43:28,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:28,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264109346] [2021-10-21 19:43:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:28,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:29,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:29,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264109346] [2021-10-21 19:43:29,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264109346] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:29,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:29,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:43:29,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633361125] [2021-10-21 19:43:29,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:43:29,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:29,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:43:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:43:29,238 INFO L87 Difference]: Start difference. First operand has 99 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 91 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:43:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:29,632 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2021-10-21 19:43:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:43:29,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:43:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:29,647 INFO L225 Difference]: With dead ends: 155 [2021-10-21 19:43:29,647 INFO L226 Difference]: Without dead ends: 146 [2021-10-21 19:43:29,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:43:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-21 19:43:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 108. [2021-10-21 19:43:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.75) internal successors, (126), 101 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:43:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2021-10-21 19:43:29,713 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 11 [2021-10-21 19:43:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:29,715 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2021-10-21 19:43:29,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:43:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2021-10-21 19:43:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:43:29,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:29,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:29,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:43:29,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_createErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:29,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2056030062, now seen corresponding path program 1 times [2021-10-21 19:43:29,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:29,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733812259] [2021-10-21 19:43:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:29,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:29,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:29,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:29,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733812259] [2021-10-21 19:43:29,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733812259] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:29,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:29,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:43:29,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970305351] [2021-10-21 19:43:29,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:43:29,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:43:29,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:43:29,880 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:43:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:30,171 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2021-10-21 19:43:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:43:30,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:43:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:30,176 INFO L225 Difference]: With dead ends: 141 [2021-10-21 19:43:30,176 INFO L226 Difference]: Without dead ends: 141 [2021-10-21 19:43:30,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:43:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-21 19:43:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-10-21 19:43:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 96 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:43:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2021-10-21 19:43:30,200 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 11 [2021-10-21 19:43:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:30,201 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2021-10-21 19:43:30,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:43:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2021-10-21 19:43:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:43:30,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:30,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:30,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:43:30,217 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:30,218 INFO L82 PathProgramCache]: Analyzing trace with hash -683912238, now seen corresponding path program 1 times [2021-10-21 19:43:30,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:30,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197639333] [2021-10-21 19:43:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:30,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:30,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:30,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:30,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:30,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197639333] [2021-10-21 19:43:30,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197639333] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:30,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:30,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:43:30,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939546352] [2021-10-21 19:43:30,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:43:30,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:43:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:43:30,392 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:30,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:30,720 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2021-10-21 19:43:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:43:30,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-10-21 19:43:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:30,728 INFO L225 Difference]: With dead ends: 101 [2021-10-21 19:43:30,728 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:43:30,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:43:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:43:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2021-10-21 19:43:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 78 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2021-10-21 19:43:30,748 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 14 [2021-10-21 19:43:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:30,748 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2021-10-21 19:43:30,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2021-10-21 19:43:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:43:30,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:30,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:30,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:43:30,751 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_createErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:30,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1129091757, now seen corresponding path program 1 times [2021-10-21 19:43:30,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:30,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442311674] [2021-10-21 19:43:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:30,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:30,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:30,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:30,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442311674] [2021-10-21 19:43:30,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442311674] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:30,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:30,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:43:30,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264904951] [2021-10-21 19:43:30,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:43:30,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:30,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:43:30,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:43:30,893 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:43:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:31,026 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2021-10-21 19:43:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:43:31,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-21 19:43:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:31,028 INFO L225 Difference]: With dead ends: 95 [2021-10-21 19:43:31,028 INFO L226 Difference]: Without dead ends: 95 [2021-10-21 19:43:31,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:43:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-21 19:43:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-10-21 19:43:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.546875) internal successors, (99), 88 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-10-21 19:43:31,033 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 20 [2021-10-21 19:43:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:31,033 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-10-21 19:43:31,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:43:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-10-21 19:43:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:43:31,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:31,034 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:31,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:43:31,035 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1531598106, now seen corresponding path program 1 times [2021-10-21 19:43:31,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:31,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266985235] [2021-10-21 19:43:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:31,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:31,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:31,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:31,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266985235] [2021-10-21 19:43:31,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266985235] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:31,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:31,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:43:31,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958265006] [2021-10-21 19:43:31,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:43:31,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:43:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:43:31,159 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:43:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:31,493 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-10-21 19:43:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:43:31,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-21 19:43:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:31,495 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:43:31,495 INFO L226 Difference]: Without dead ends: 94 [2021-10-21 19:43:31,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:43:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-21 19:43:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-10-21 19:43:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 82 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-10-21 19:43:31,503 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 26 [2021-10-21 19:43:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:31,504 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-10-21 19:43:31,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:43:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-10-21 19:43:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:43:31,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:31,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:31,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:43:31,506 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:31,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1531598105, now seen corresponding path program 1 times [2021-10-21 19:43:31,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:31,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185203643] [2021-10-21 19:43:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:31,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:31,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:31,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:31,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:31,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185203643] [2021-10-21 19:43:31,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185203643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:31,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499615161] [2021-10-21 19:43:31,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:31,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:31,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:43:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:31,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:43:31,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:31,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499615161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:31,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:31,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-10-21 19:43:31,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020955653] [2021-10-21 19:43:31,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:43:31,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:31,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:43:31,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:43:31,945 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:32,225 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2021-10-21 19:43:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:43:32,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-10-21 19:43:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:32,226 INFO L225 Difference]: With dead ends: 106 [2021-10-21 19:43:32,226 INFO L226 Difference]: Without dead ends: 103 [2021-10-21 19:43:32,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:43:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-21 19:43:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 90. [2021-10-21 19:43:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 84 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2021-10-21 19:43:32,230 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 26 [2021-10-21 19:43:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:32,230 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2021-10-21 19:43:32,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2021-10-21 19:43:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:43:32,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:32,232 INFO L512 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] [2021-10-21 19:43:32,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:32,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:32,445 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_createErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1306178878, now seen corresponding path program 1 times [2021-10-21 19:43:32,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:32,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016688356] [2021-10-21 19:43:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:32,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:32,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:32,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:32,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016688356] [2021-10-21 19:43:32,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016688356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:32,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682692528] [2021-10-21 19:43:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:32,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:32,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,573 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:43:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:32,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:43:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:32,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:43:32,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:43:33,018 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:43:33,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-21 19:43:33,028 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:43:33,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-21 19:43:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:33,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682692528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:33,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:33,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-21 19:43:33,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947457206] [2021-10-21 19:43:33,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:43:33,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:43:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:43:33,306 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:43:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:33,542 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-10-21 19:43:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:43:33,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 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 32 [2021-10-21 19:43:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:33,544 INFO L225 Difference]: With dead ends: 89 [2021-10-21 19:43:33,545 INFO L226 Difference]: Without dead ends: 89 [2021-10-21 19:43:33,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:43:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-21 19:43:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-10-21 19:43:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 83 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2021-10-21 19:43:33,549 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 32 [2021-10-21 19:43:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:33,549 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2021-10-21 19:43:33,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:43:33,550 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2021-10-21 19:43:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:43:33,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:33,555 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:43:33,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:33,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:33,769 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash 773915643, now seen corresponding path program 2 times [2021-10-21 19:43:33,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:33,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532431350] [2021-10-21 19:43:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:33,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:33,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:33,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:33,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:33,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532431350] [2021-10-21 19:43:33,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532431350] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:33,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349653789] [2021-10-21 19:43:33,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:43:33,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:43:34,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:43:34,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:34,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:43:34,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:34,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349653789] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:34,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:34,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-10-21 19:43:34,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904986646] [2021-10-21 19:43:34,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:43:34,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:43:34,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:43:34,273 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 11 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:43:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:34,661 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2021-10-21 19:43:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:43:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2021-10-21 19:43:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:34,663 INFO L225 Difference]: With dead ends: 117 [2021-10-21 19:43:34,663 INFO L226 Difference]: Without dead ends: 114 [2021-10-21 19:43:34,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:43:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-21 19:43:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2021-10-21 19:43:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 96 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2021-10-21 19:43:34,679 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 38 [2021-10-21 19:43:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:34,679 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2021-10-21 19:43:34,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:43:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2021-10-21 19:43:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-21 19:43:34,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:34,681 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:34,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:34,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-21 19:43:34,893 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1265167833, now seen corresponding path program 1 times [2021-10-21 19:43:34,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:34,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696847997] [2021-10-21 19:43:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:34,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:34,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:34,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:35,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:35,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696847997] [2021-10-21 19:43:35,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696847997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:35,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081184391] [2021-10-21 19:43:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:35,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:35,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:35,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:35,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:43:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:35,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:43:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:35,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081184391] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:35,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:35,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2021-10-21 19:43:35,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290187812] [2021-10-21 19:43:35,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:43:35,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:35,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:43:35,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:43:35,471 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 11 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:35,711 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2021-10-21 19:43:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:43:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-10-21 19:43:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:35,714 INFO L225 Difference]: With dead ends: 130 [2021-10-21 19:43:35,714 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 19:43:35,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:43:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 19:43:35,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-10-21 19:43:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.305263157894737) internal successors, (124), 109 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2021-10-21 19:43:35,718 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 52 [2021-10-21 19:43:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:35,719 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2021-10-21 19:43:35,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2021-10-21 19:43:35,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-21 19:43:35,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:35,721 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:35,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:35,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:35,940 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash -638876471, now seen corresponding path program 2 times [2021-10-21 19:43:35,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:35,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658260670] [2021-10-21 19:43:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:35,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:36,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:36,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658260670] [2021-10-21 19:43:36,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658260670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:36,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615894476] [2021-10-21 19:43:36,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:43:36,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:36,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:36,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:36,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:43:36,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:43:36,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:36,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:43:36,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:36,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615894476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:36,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:36,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-10-21 19:43:36,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220370975] [2021-10-21 19:43:36,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:43:36,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:43:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:43:36,673 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 12 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 states have internal predecessors, (74), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:36,931 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2021-10-21 19:43:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:43:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 states have internal predecessors, (74), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2021-10-21 19:43:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:36,933 INFO L225 Difference]: With dead ends: 143 [2021-10-21 19:43:36,934 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 19:43:36,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:43:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 19:43:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2021-10-21 19:43:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.2777777777777777) internal successors, (138), 122 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 143 transitions. [2021-10-21 19:43:36,937 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 143 transitions. Word has length 65 [2021-10-21 19:43:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:36,938 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 143 transitions. [2021-10-21 19:43:36,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 states have internal predecessors, (74), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 143 transitions. [2021-10-21 19:43:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-21 19:43:36,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:36,940 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:36,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:37,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:43:37,165 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1355159193, now seen corresponding path program 3 times [2021-10-21 19:43:37,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:37,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656155455] [2021-10-21 19:43:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:37,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:37,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-10-21 19:43:37,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:37,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656155455] [2021-10-21 19:43:37,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656155455] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:37,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:37,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:43:37,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882804976] [2021-10-21 19:43:37,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:43:37,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:37,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:43:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:43:37,526 INFO L87 Difference]: Start difference. First operand 128 states and 143 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:43:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:37,862 INFO L93 Difference]: Finished difference Result 163 states and 183 transitions. [2021-10-21 19:43:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:43:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 78 [2021-10-21 19:43:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:37,865 INFO L225 Difference]: With dead ends: 163 [2021-10-21 19:43:37,866 INFO L226 Difference]: Without dead ends: 163 [2021-10-21 19:43:37,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:43:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-21 19:43:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 154. [2021-10-21 19:43:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 134 states have (on average 1.2761194029850746) internal successors, (171), 148 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 176 transitions. [2021-10-21 19:43:37,882 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 176 transitions. Word has length 78 [2021-10-21 19:43:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:37,883 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 176 transitions. [2021-10-21 19:43:37,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:43:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 176 transitions. [2021-10-21 19:43:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-21 19:43:37,886 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:37,887 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:37,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:43:37,887 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr22ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1136298550, now seen corresponding path program 1 times [2021-10-21 19:43:37,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:37,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544383932] [2021-10-21 19:43:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:37,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:38,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-10-21 19:43:38,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:38,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544383932] [2021-10-21 19:43:38,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544383932] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:38,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:38,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:43:38,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835515527] [2021-10-21 19:43:38,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:43:38,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:43:38,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:43:38,107 INFO L87 Difference]: Start difference. First operand 154 states and 176 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:43:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:38,370 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2021-10-21 19:43:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:43:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 82 [2021-10-21 19:43:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:38,371 INFO L225 Difference]: With dead ends: 160 [2021-10-21 19:43:38,371 INFO L226 Difference]: Without dead ends: 160 [2021-10-21 19:43:38,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:43:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-21 19:43:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2021-10-21 19:43:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 134 states have (on average 1.2686567164179106) internal successors, (170), 148 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 175 transitions. [2021-10-21 19:43:38,376 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 175 transitions. Word has length 82 [2021-10-21 19:43:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:38,376 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 175 transitions. [2021-10-21 19:43:38,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:43:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 175 transitions. [2021-10-21 19:43:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:43:38,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:38,378 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:38,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:43:38,378 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr21ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash -22511990, now seen corresponding path program 1 times [2021-10-21 19:43:38,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:38,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757214506] [2021-10-21 19:43:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:38,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:38,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:38,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 74 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-21 19:43:38,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:38,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757214506] [2021-10-21 19:43:38,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757214506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:38,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845423692] [2021-10-21 19:43:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:38,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:38,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:38,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:43:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:39,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:43:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:39,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:43:39,289 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:43:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:43:39,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:43:39,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-21 19:43:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-21 19:43:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-21 19:43:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-21 19:43:39,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:39,608 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-21 19:43:39,609 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 40 treesize of output 27 [2021-10-21 19:43:39,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:43:39,813 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 22 treesize of output 10 [2021-10-21 19:43:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 78 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 19:43:39,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845423692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:39,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:39,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-10-21 19:43:39,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522664300] [2021-10-21 19:43:39,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:43:39,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:43:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:43:39,829 INFO L87 Difference]: Start difference. First operand 154 states and 175 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 19 states have internal predecessors, (80), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:43:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:40,637 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2021-10-21 19:43:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:43:40,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 19 states have internal predecessors, (80), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 86 [2021-10-21 19:43:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:40,640 INFO L225 Difference]: With dead ends: 160 [2021-10-21 19:43:40,640 INFO L226 Difference]: Without dead ends: 160 [2021-10-21 19:43:40,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 576.7ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:43:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-21 19:43:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2021-10-21 19:43:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 134 states have (on average 1.2611940298507462) internal successors, (169), 148 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2021-10-21 19:43:40,645 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 86 [2021-10-21 19:43:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:40,646 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2021-10-21 19:43:40,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 19 states have internal predecessors, (80), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:43:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2021-10-21 19:43:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-21 19:43:40,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:40,648 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:40,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:40,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:43:40,869 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr21ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:40,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1467603535, now seen corresponding path program 1 times [2021-10-21 19:43:40,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:40,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145911968] [2021-10-21 19:43:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:40,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:41,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:41,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 74 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-21 19:43:41,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:41,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145911968] [2021-10-21 19:43:41,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145911968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:41,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762906033] [2021-10-21 19:43:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:41,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:41,326 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:41,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:43:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:41,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 19:43:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:41,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:43:41,798 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:43:41,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:43:41,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:43:41,906 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 19:43:41,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-21 19:43:41,939 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-21 19:43:41,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-21 19:43:41,961 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-21 19:43:41,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-21 19:43:41,993 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 19:43:41,993 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 33 treesize of output 17 [2021-10-21 19:43:42,130 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 19 treesize of output 7 [2021-10-21 19:43:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 78 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 19:43:42,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762906033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:42,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:42,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-10-21 19:43:42,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603962962] [2021-10-21 19:43:42,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:43:42,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:42,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:43:42,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:43:42,150 INFO L87 Difference]: Start difference. First operand 154 states and 174 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 19 states have internal predecessors, (85), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:43:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:42,934 INFO L93 Difference]: Finished difference Result 160 states and 178 transitions. [2021-10-21 19:43:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:43:42,935 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 19 states have internal predecessors, (85), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 88 [2021-10-21 19:43:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:42,936 INFO L225 Difference]: With dead ends: 160 [2021-10-21 19:43:42,937 INFO L226 Difference]: Without dead ends: 160 [2021-10-21 19:43:42,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 513.0ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:43:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-21 19:43:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2021-10-21 19:43:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 134 states have (on average 1.2537313432835822) internal successors, (168), 148 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 173 transitions. [2021-10-21 19:43:42,942 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 173 transitions. Word has length 88 [2021-10-21 19:43:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:42,943 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 173 transitions. [2021-10-21 19:43:42,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 19 states have internal predecessors, (85), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:43:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 173 transitions. [2021-10-21 19:43:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-21 19:43:42,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:42,945 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:42,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:43,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:43,161 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr21ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2087514772, now seen corresponding path program 1 times [2021-10-21 19:43:43,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:43,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155829608] [2021-10-21 19:43:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:43,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:43,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:43,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 74 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-21 19:43:43,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:43,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155829608] [2021-10-21 19:43:43,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155829608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:43,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594061254] [2021-10-21 19:43:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:43,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:43,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:43,574 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:43,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:43:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:43:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:44,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:43:44,212 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:43:44,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:43:44,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:43:44,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:44,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-21 19:43:44,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:44,455 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-21 19:43:44,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-10-21 19:43:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:43:44,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:43:44,861 INFO L354 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2021-10-21 19:43:44,861 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 46 treesize of output 24 [2021-10-21 19:43:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 78 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 19:43:44,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594061254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:44,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:44,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-10-21 19:43:44,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169387554] [2021-10-21 19:43:44,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 19:43:44,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:44,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 19:43:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:43:44,917 INFO L87 Difference]: Start difference. First operand 154 states and 173 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 22 states have internal predecessors, (98), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:43:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:46,015 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2021-10-21 19:43:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:43:46,015 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 22 states have internal predecessors, (98), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 89 [2021-10-21 19:43:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:46,016 INFO L225 Difference]: With dead ends: 143 [2021-10-21 19:43:46,017 INFO L226 Difference]: Without dead ends: 143 [2021-10-21 19:43:46,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1005.8ms TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 19:43:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-21 19:43:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-10-21 19:43:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 120 states have (on average 1.25) internal successors, (150), 134 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:43:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2021-10-21 19:43:46,022 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 89 [2021-10-21 19:43:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:46,023 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2021-10-21 19:43:46,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 22 states have internal predecessors, (98), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:43:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2021-10-21 19:43:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-21 19:43:46,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:46,025 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:46,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:46,233 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr21ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 30 more)] === [2021-10-21 19:43:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1619301044, now seen corresponding path program 1 times [2021-10-21 19:43:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:46,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874644278] [2021-10-21 19:43:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:46,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:46,319 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:46,430 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:46,431 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:43:46,433 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr21ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:43:46,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:43:46,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:43:46,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:43:46,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:43:46,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 19:43:46,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 19:43:46,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-21 19:43:46,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 19:43:46,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-21 19:43:46,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-21 19:43:46,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-21 19:43:46,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-21 19:43:46,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-21 19:43:46,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-21 19:43:46,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-21 19:43:46,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-21 19:43:46,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-21 19:43:46,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-21 19:43:46,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:43:46,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:43:46,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:43:46,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:43:46,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr0REQUIRES_VIOLATION [2021-10-21 19:43:46,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr1REQUIRES_VIOLATION [2021-10-21 19:43:46,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr2REQUIRES_VIOLATION [2021-10-21 19:43:46,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr3REQUIRES_VIOLATION [2021-10-21 19:43:46,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr4REQUIRES_VIOLATION [2021-10-21 19:43:46,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr5REQUIRES_VIOLATION [2021-10-21 19:43:46,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr6REQUIRES_VIOLATION [2021-10-21 19:43:46,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr7REQUIRES_VIOLATION [2021-10-21 19:43:46,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr8REQUIRES_VIOLATION [2021-10-21 19:43:46,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr9REQUIRES_VIOLATION [2021-10-21 19:43:46,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr10REQUIRES_VIOLATION [2021-10-21 19:43:46,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location dll_createErr11REQUIRES_VIOLATION [2021-10-21 19:43:46,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:43:46,451 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:43:46,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:43:46 BoogieIcfgContainer [2021-10-21 19:43:46,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:43:46,543 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:43:46,543 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:43:46,543 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:43:46,544 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:43:28" (3/4) ... [2021-10-21 19:43:46,546 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:43:46,631 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:43:46,631 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:43:46,633 INFO L168 Benchmark]: Toolchain (without parser) took 19206.80 ms. Allocated memory was 121.6 MB in the beginning and 192.9 MB in the end (delta: 71.3 MB). Free memory was 82.8 MB in the beginning and 128.7 MB in the end (delta: -45.9 MB). Peak memory consumption was 25.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,633 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 121.6 MB. Free memory is still 100.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:43:46,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 560.22 ms. Allocated memory is still 121.6 MB. Free memory was 82.6 MB in the beginning and 88.1 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,634 INFO L168 Benchmark]: Boogie Preprocessor took 79.07 ms. Allocated memory is still 121.6 MB. Free memory was 88.1 MB in the beginning and 85.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,634 INFO L168 Benchmark]: RCFGBuilder took 734.24 ms. Allocated memory is still 121.6 MB. Free memory was 85.3 MB in the beginning and 61.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,635 INFO L168 Benchmark]: TraceAbstraction took 17739.33 ms. Allocated memory was 121.6 MB in the beginning and 192.9 MB in the end (delta: 71.3 MB). Free memory was 61.0 MB in the beginning and 132.8 MB in the end (delta: -71.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,635 INFO L168 Benchmark]: Witness Printer took 88.55 ms. Allocated memory is still 192.9 MB. Free memory was 132.8 MB in the beginning and 128.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,641 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 121.6 MB. Free memory is still 100.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 560.22 ms. Allocated memory is still 121.6 MB. Free memory was 82.6 MB in the beginning and 88.1 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.07 ms. Allocated memory is still 121.6 MB. Free memory was 88.1 MB in the beginning and 85.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 734.24 ms. Allocated memory is still 121.6 MB. Free memory was 85.3 MB in the beginning and 61.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17739.33 ms. Allocated memory was 121.6 MB in the beginning and 192.9 MB in the end (delta: 71.3 MB). Free memory was 61.0 MB in the beginning and 132.8 MB in the end (delta: -71.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Witness Printer took 88.55 ms. Allocated memory is still 192.9 MB. Free memory was 132.8 MB in the beginning and 128.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 616]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L599] const int len = 5; VAL [len=5] [L600] CALL, EXPR dll_create(len) VAL [\old(len)=5] [L579] DLL head = ((void *)0); VAL [\old(len)=5, head={0:0}, len=5] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, new_head={-1:0}] [L585] new_head->data_0 = 0 VAL [\old(len)=5, head={0:0}, len=5, new_head={-1:0}] [L586] new_head->data_1 = 0 VAL [\old(len)=5, head={0:0}, len=5, new_head={-1:0}] [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=5, __VERIFIER_nondet_int() == len? 1 : 0=1, head={0:0}, len=5, new_head={-1:0}] [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=5, __VERIFIER_nondet_int() == len? 1 : 0=1, head={0:0}, len=5, new_head={-1:0}] [L588] new_head->next = head VAL [\old(len)=5, head={0:0}, len=5, new_head={-1:0}] [L589] new_head->prev = ((void *)0) VAL [\old(len)=5, head={0:0}, len=5, new_head={-1:0}] [L590] COND FALSE !(\read(head)) VAL [\old(len)=5, head={0:0}, len=5, new_head={-1:0}] [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-1:0}, len=4, new_head={-1:0}] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-1:0}, len=4, new_head={-2:0}] [L585] new_head->data_0 = 0 VAL [\old(len)=5, head={-1:0}, len=4, new_head={-2:0}] [L586] new_head->data_1 = 0 VAL [\old(len)=5, head={-1:0}, len=4, new_head={-2:0}] [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=4, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-1:0}, len=4, new_head={-2:0}] [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=4, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-1:0}, len=4, new_head={-2:0}] [L588] new_head->next = head VAL [\old(len)=5, head={-1:0}, len=4, new_head={-2:0}] [L589] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-1:0}, len=4, new_head={-2:0}] [L590] COND TRUE \read(head) VAL [\old(len)=5, head={-1:0}, len=4, new_head={-2:0}] [L591] head->prev = new_head VAL [\old(len)=5, head={-1:0}, len=4, new_head={-2:0}] [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-2:0}, len=3, new_head={-2:0}] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-2:0}, len=3, new_head={-3:0}] [L585] new_head->data_0 = 0 VAL [\old(len)=5, head={-2:0}, len=3, new_head={-3:0}] [L586] new_head->data_1 = 0 VAL [\old(len)=5, head={-2:0}, len=3, new_head={-3:0}] [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=3, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=3, new_head={-3:0}] [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=3, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=3, new_head={-3:0}] [L588] new_head->next = head VAL [\old(len)=5, head={-2:0}, len=3, new_head={-3:0}] [L589] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-2:0}, len=3, new_head={-3:0}] [L590] COND TRUE \read(head) VAL [\old(len)=5, head={-2:0}, len=3, new_head={-3:0}] [L591] head->prev = new_head VAL [\old(len)=5, head={-2:0}, len=3, new_head={-3:0}] [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-3:0}, len=2, new_head={-3:0}] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-3:0}, len=2, new_head={-4:0}] [L585] new_head->data_0 = 0 VAL [\old(len)=5, head={-3:0}, len=2, new_head={-4:0}] [L586] new_head->data_1 = 0 VAL [\old(len)=5, head={-3:0}, len=2, new_head={-4:0}] [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-3:0}, len=2, new_head={-4:0}] [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-3:0}, len=2, new_head={-4:0}] [L588] new_head->next = head VAL [\old(len)=5, head={-3:0}, len=2, new_head={-4:0}] [L589] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-3:0}, len=2, new_head={-4:0}] [L590] COND TRUE \read(head) VAL [\old(len)=5, head={-3:0}, len=2, new_head={-4:0}] [L591] head->prev = new_head VAL [\old(len)=5, head={-3:0}, len=2, new_head={-4:0}] [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-4:0}, len=1, new_head={-4:0}] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-4:0}, len=1, new_head={-5:0}] [L585] new_head->data_0 = 0 VAL [\old(len)=5, head={-4:0}, len=1, new_head={-5:0}] [L586] new_head->data_1 = 0 VAL [\old(len)=5, head={-4:0}, len=1, new_head={-5:0}] [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-4:0}, len=1, new_head={-5:0}] [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-4:0}, len=1, new_head={-5:0}] [L588] new_head->next = head VAL [\old(len)=5, head={-4:0}, len=1, new_head={-5:0}] [L589] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-4:0}, len=1, new_head={-5:0}] [L590] COND TRUE \read(head) VAL [\old(len)=5, head={-4:0}, len=1, new_head={-5:0}] [L591] head->prev = new_head VAL [\old(len)=5, head={-4:0}, len=1, new_head={-5:0}] [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-5:0}, len=0, new_head={-5:0}] [L580] COND FALSE !(len > 0) VAL [\old(len)=5, head={-5:0}, len=0, new_head={-5:0}] [L596] return head; VAL [\old(len)=5, \result={-5:0}, head={-5:0}, len=0, new_head={-5:0}] [L600] RET, EXPR dll_create(len) VAL [dll_create(len)={-5:0}, len=5] [L600] DLL head = dll_create(len); [L601] head->next VAL [head={-5:0}, head->next={-4:0}, len=5] [L601] COND TRUE head->next [L602] EXPR head->data_0 VAL [head={-5:0}, head->data_0=0, len=5] [L602] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-5:0}, head->data_0=0, len=5] [L602] EXPR head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-5:0}, head->data_0=0, head->data_1=0, len=5] [L602] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-5:0}, head->data_0=0, head->data_1=0, len=5] [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=0, head={-5:0}, head->data_0=0, head->data_1=0, len=5] [L602] EXPR head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=0, head={-5:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=1, head={-5:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() VAL [head={-5:0}, len=5] - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 109 locations, 35 error locations. Started 1 CEGAR loops. OverallTime: 17593.9ms, OverallIterations: 16, TraceHistogramMax: 5, EmptinessCheckTime: 44.4ms, AutomataDifference: 6269.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1017 SDtfs, 1327 SDslu, 5277 SDs, 0 SdLazy, 5271 SolverSat, 243 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3432.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 727 GetRequests, 501 SyntacticMatches, 11 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 3338.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=11, InterpolantAutomatonStates: 151, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 164.0ms AutomataMinimizationTime, 15 MinimizatonAttempts, 176 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 180.5ms SsaConstructionTime, 905.3ms SatisfiabilityAnalysisTime, 6452.8ms InterpolantComputationTime, 1284 NumberOfCodeBlocks, 1284 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1171 ConstructedInterpolants, 18 QuantifiedInterpolants, 5611 SizeOfPredicates, 41 NumberOfNonLiveVariables, 2618 ConjunctsInSsa, 134 ConjunctsInUnsatCore, 23 InterpolantComputations, 7 PerfectInterpolantSequences, 983/1339 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:43:46,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_490b7223-2a00-43e7-9b4a-2a1aebf78a76/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...