./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:27:13,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:27:13,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:27:14,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:27:14,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:27:14,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:27:14,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:27:14,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:27:14,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:27:14,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:27:14,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:27:14,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:27:14,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:27:14,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:27:14,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:27:14,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:27:14,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:27:14,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:27:14,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:27:14,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:27:14,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:27:14,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:27:14,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:27:14,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:27:14,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:27:14,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:27:14,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:27:14,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:27:14,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:27:14,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:27:14,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:27:14,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:27:14,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:27:14,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:27:14,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:27:14,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:27:14,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:27:14,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:27:14,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:27:14,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:27:14,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:27:14,100 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:27:14,136 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:27:14,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:27:14,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:27:14,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:27:14,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:27:14,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:27:14,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:27:14,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:27:14,140 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:27:14,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:27:14,141 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:27:14,141 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:27:14,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:27:14,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:27:14,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:27:14,142 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:27:14,142 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:27:14,143 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:27:14,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:27:14,143 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:27:14,143 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:27:14,144 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:27:14,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:27:14,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:27:14,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:27:14,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:27:14,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:27:14,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:27:14,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:27:14,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:27:14,146 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:27:14,146 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:27:14,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:27:14,147 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 [2022-11-23 03:27:14,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:27:14,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:27:14,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:27:14,497 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:27:14,497 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:27:14,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread/fib_safe-12.i [2022-11-23 03:27:17,567 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:27:17,835 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:27:17,835 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/sv-benchmarks/c/pthread/fib_safe-12.i [2022-11-23 03:27:17,847 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/data/41bad75eb/be53d3910dbe48b2b08e37cfdea84aae/FLAGeec9aa891 [2022-11-23 03:27:17,860 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/data/41bad75eb/be53d3910dbe48b2b08e37cfdea84aae [2022-11-23 03:27:17,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:27:17,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:27:17,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:27:17,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:27:17,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:27:17,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:17" (1/1) ... [2022-11-23 03:27:17,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe0572d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:17, skipping insertion in model container [2022-11-23 03:27:17,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:17" (1/1) ... [2022-11-23 03:27:17,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:27:17,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:27:18,185 WARN L237 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_fafa3651-d3e3-4df8-a779-8fb2f8032f44/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2022-11-23 03:27:18,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:27:18,215 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:27:18,248 WARN L237 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_fafa3651-d3e3-4df8-a779-8fb2f8032f44/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2022-11-23 03:27:18,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:27:18,286 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:27:18,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18 WrapperNode [2022-11-23 03:27:18,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:27:18,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:27:18,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:27:18,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:27:18,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,326 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-23 03:27:18,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:27:18,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:27:18,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:27:18,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:27:18,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,348 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:27:18,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:27:18,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:27:18,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:27:18,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (1/1) ... [2022-11-23 03:27:18,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:27:18,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:27:18,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:27:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-23 03:27:18,462 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-23 03:27:18,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:27:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-23 03:27:18,490 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-23 03:27:18,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:27:18,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:27:18,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:27:18,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:27:18,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:27:18,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:27:18,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:27:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:27:18,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:27:18,493 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:27:18,663 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:27:18,665 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:27:18,872 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:27:18,886 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:27:18,886 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 03:27:18,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:18 BoogieIcfgContainer [2022-11-23 03:27:18,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:27:18,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:27:18,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:27:18,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:27:18,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:27:17" (1/3) ... [2022-11-23 03:27:18,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32106bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:18, skipping insertion in model container [2022-11-23 03:27:18,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:18" (2/3) ... [2022-11-23 03:27:18,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32106bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:18, skipping insertion in model container [2022-11-23 03:27:18,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:18" (3/3) ... [2022-11-23 03:27:18,897 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2022-11-23 03:27:18,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:27:18,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-23 03:27:18,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:27:18,988 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:27:19,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-11-23 03:27:19,076 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-23 03:27:19,076 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:27:19,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-23 03:27:19,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 109 transitions, 228 flow [2022-11-23 03:27:19,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 220 flow [2022-11-23 03:27:19,090 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:27:19,105 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 107 transitions, 220 flow [2022-11-23 03:27:19,108 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 107 transitions, 220 flow [2022-11-23 03:27:19,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 220 flow [2022-11-23 03:27:19,155 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-23 03:27:19,157 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:27:19,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-23 03:27:19,163 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-11-23 03:27:24,086 INFO L134 LiptonReduction]: Checked pairs total: 1749 [2022-11-23 03:27:24,086 INFO L136 LiptonReduction]: Total number of compositions: 117 [2022-11-23 03:27:24,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:27:24,110 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@40c07fd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:27:24,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-23 03:27:24,111 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-23 03:27:24,112 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:27:24,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:24,112 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-23 03:27:24,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:24,118 INFO L85 PathProgramCache]: Analyzing trace with hash 417, now seen corresponding path program 1 times [2022-11-23 03:27:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:24,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140481819] [2022-11-23 03:27:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:24,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:24,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:24,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140481819] [2022-11-23 03:27:24,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140481819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:27:24,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:27:24,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-23 03:27:24,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761784521] [2022-11-23 03:27:24,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:27:24,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:27:24,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:27:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:27:24,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 226 [2022-11-23 03:27:24,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:24,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 226 [2022-11-23 03:27:24,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:24,370 INFO L130 PetriNetUnfolder]: 103/161 cut-off events. [2022-11-23 03:27:24,371 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:27:24,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 161 events. 103/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 391 event pairs, 60 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 324. Up to 162 conditions per place. [2022-11-23 03:27:24,375 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2022-11-23 03:27:24,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2022-11-23 03:27:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:27:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 03:27:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2022-11-23 03:27:24,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49336283185840707 [2022-11-23 03:27:24,398 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2022-11-23 03:27:24,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2022-11-23 03:27:24,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:24,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2022-11-23 03:27:24,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,418 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,421 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 2 states and 223 transitions. [2022-11-23 03:27:24,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2022-11-23 03:27:24,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:27:24,442 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 36 flow [2022-11-23 03:27:24,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-11-23 03:27:24,448 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-11-23 03:27:24,448 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 36 flow [2022-11-23 03:27:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:24,449 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:27:24,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:27:24,449 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash 411484, now seen corresponding path program 1 times [2022-11-23 03:27:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:24,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786254950] [2022-11-23 03:27:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:24,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:24,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786254950] [2022-11-23 03:27:24,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786254950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:27:24,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:27:24,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:27:24,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468189072] [2022-11-23 03:27:24,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:27:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:27:24,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:27:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:27:24,748 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-11-23 03:27:24,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:24,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-11-23 03:27:24,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:24,816 INFO L130 PetriNetUnfolder]: 82/128 cut-off events. [2022-11-23 03:27:24,816 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:27:24,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 128 events. 82/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 277 event pairs, 34 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 264. Up to 101 conditions per place. [2022-11-23 03:27:24,822 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-11-23 03:27:24,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 88 flow [2022-11-23 03:27:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:27:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:27:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2022-11-23 03:27:24,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46607669616519176 [2022-11-23 03:27:24,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2022-11-23 03:27:24,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2022-11-23 03:27:24,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:24,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2022-11-23 03:27:24,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,838 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 36 flow. Second operand 3 states and 316 transitions. [2022-11-23 03:27:24,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 88 flow [2022-11-23 03:27:24,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:27:24,839 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2022-11-23 03:27:24,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-11-23 03:27:24,840 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-11-23 03:27:24,840 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2022-11-23 03:27:24,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:24,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:24,842 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:27:24,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:27:24,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:24,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:24,845 INFO L85 PathProgramCache]: Analyzing trace with hash 411485, now seen corresponding path program 1 times [2022-11-23 03:27:24,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:24,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449376987] [2022-11-23 03:27:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:24,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:24,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:24,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449376987] [2022-11-23 03:27:24,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449376987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:27:24,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:27:24,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:27:24,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344039052] [2022-11-23 03:27:24,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:27:24,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:27:24,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:24,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:27:24,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:27:25,012 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 226 [2022-11-23 03:27:25,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:25,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 226 [2022-11-23 03:27:25,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:25,073 INFO L130 PetriNetUnfolder]: 79/122 cut-off events. [2022-11-23 03:27:25,073 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 03:27:25,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 122 events. 79/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 264 event pairs, 32 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 262. Up to 95 conditions per place. [2022-11-23 03:27:25,077 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2022-11-23 03:27:25,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 88 flow [2022-11-23 03:27:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:27:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:27:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2022-11-23 03:27:25,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45132743362831856 [2022-11-23 03:27:25,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2022-11-23 03:27:25,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2022-11-23 03:27:25,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:25,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2022-11-23 03:27:25,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,084 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 38 flow. Second operand 3 states and 306 transitions. [2022-11-23 03:27:25,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 88 flow [2022-11-23 03:27:25,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:27:25,086 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 36 flow [2022-11-23 03:27:25,086 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-11-23 03:27:25,088 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2022-11-23 03:27:25,088 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 36 flow [2022-11-23 03:27:25,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,089 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:25,089 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 03:27:25,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:27:25,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash -626046303, now seen corresponding path program 1 times [2022-11-23 03:27:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:25,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839617104] [2022-11-23 03:27:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:25,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:25,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839617104] [2022-11-23 03:27:25,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839617104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:27:25,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:27:25,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:27:25,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122253223] [2022-11-23 03:27:25,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:27:25,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:27:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:27:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:27:25,213 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-11-23 03:27:25,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:25,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-11-23 03:27:25,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:25,281 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-11-23 03:27:25,282 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 03:27:25,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 149 events. 97/149 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 332 event pairs, 20 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 316. Up to 91 conditions per place. [2022-11-23 03:27:25,283 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-11-23 03:27:25,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 92 flow [2022-11-23 03:27:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:27:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:27:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-11-23 03:27:25,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46755162241887904 [2022-11-23 03:27:25,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-11-23 03:27:25,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-11-23 03:27:25,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:25,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-11-23 03:27:25,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,303 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 36 flow. Second operand 3 states and 317 transitions. [2022-11-23 03:27:25,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 92 flow [2022-11-23 03:27:25,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:27:25,305 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 46 flow [2022-11-23 03:27:25,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-11-23 03:27:25,307 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-11-23 03:27:25,307 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 46 flow [2022-11-23 03:27:25,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:25,308 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:27:25,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:27:25,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:25,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2067401261, now seen corresponding path program 1 times [2022-11-23 03:27:25,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:25,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343991212] [2022-11-23 03:27:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:25,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:25,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:25,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343991212] [2022-11-23 03:27:25,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343991212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:27:25,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292819491] [2022-11-23 03:27:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:25,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:25,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:27:25,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:27:25,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:27:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:27:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:27:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:25,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:27:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:25,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292819491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:27:25,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:27:25,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 03:27:25,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062145352] [2022-11-23 03:27:25,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:27:25,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:27:25,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:27:25,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:27:25,644 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-11-23 03:27:25,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 46 flow. Second operand has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:25,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-11-23 03:27:25,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:25,782 INFO L130 PetriNetUnfolder]: 151/230 cut-off events. [2022-11-23 03:27:25,782 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 03:27:25,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 230 events. 151/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 529 event pairs, 20 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 541. Up to 91 conditions per place. [2022-11-23 03:27:25,786 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-11-23 03:27:25,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 190 flow [2022-11-23 03:27:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:27:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:27:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2022-11-23 03:27:25,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646017699115044 [2022-11-23 03:27:25,789 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2022-11-23 03:27:25,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2022-11-23 03:27:25,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:25,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2022-11-23 03:27:25,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,796 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 46 flow. Second operand 6 states and 630 transitions. [2022-11-23 03:27:25,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 190 flow [2022-11-23 03:27:25,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:27:25,798 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 86 flow [2022-11-23 03:27:25,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2022-11-23 03:27:25,801 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-11-23 03:27:25,801 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 86 flow [2022-11-23 03:27:25,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:25,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:25,820 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-23 03:27:25,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:27:26,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:26,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash 119868329, now seen corresponding path program 2 times [2022-11-23 03:27:26,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:26,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912106672] [2022-11-23 03:27:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:26,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:26,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912106672] [2022-11-23 03:27:26,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912106672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:27:26,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943348535] [2022-11-23 03:27:26,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:27:26,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:26,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:27:26,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:27:26,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:27:26,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 03:27:26,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:27:26,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 03:27:26,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:27:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:27:26,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:27:26,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943348535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:27:26,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:27:26,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-11-23 03:27:26,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581007746] [2022-11-23 03:27:26,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:27:26,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:27:26,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:27:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:27:26,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-11-23 03:27:26,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:26,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:26,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-11-23 03:27:26,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:26,657 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-11-23 03:27:26,658 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-23 03:27:26,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 203 events. 133/203 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 445 event pairs, 80 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 569. Up to 203 conditions per place. [2022-11-23 03:27:26,660 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-23 03:27:26,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 110 flow [2022-11-23 03:27:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:27:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:27:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2022-11-23 03:27:26,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277286135693215 [2022-11-23 03:27:26,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2022-11-23 03:27:26,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2022-11-23 03:27:26,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:26,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2022-11-23 03:27:26,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:26,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:26,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:26,668 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 86 flow. Second operand 3 states and 290 transitions. [2022-11-23 03:27:26,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 110 flow [2022-11-23 03:27:26,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 96 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 03:27:26,674 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 64 flow [2022-11-23 03:27:26,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2022-11-23 03:27:26,677 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-11-23 03:27:26,677 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 64 flow [2022-11-23 03:27:26,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:26,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:26,678 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-23 03:27:26,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:27:26,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:26,883 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash 119868321, now seen corresponding path program 1 times [2022-11-23 03:27:26,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:26,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565039394] [2022-11-23 03:27:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:26,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:27,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:27,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565039394] [2022-11-23 03:27:27,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565039394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:27:27,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727341905] [2022-11-23 03:27:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:27,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:27,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:27:27,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:27:27,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:27:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:27:27,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:27:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:27,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:27:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:27,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727341905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:27:27,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:27:27,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 03:27:27,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823023605] [2022-11-23 03:27:27,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:27:27,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:27:27,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:27,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:27:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:27:27,248 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-11-23 03:27:27,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 64 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:27,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:27,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-11-23 03:27:27,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:27,434 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-11-23 03:27:27,434 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-11-23 03:27:27,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 365 events. 241/365 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 844 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 947. Up to 82 conditions per place. [2022-11-23 03:27:27,438 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-11-23 03:27:27,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 83 transitions, 386 flow [2022-11-23 03:27:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:27:27,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 03:27:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1253 transitions. [2022-11-23 03:27:27,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46202064896755163 [2022-11-23 03:27:27,442 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1253 transitions. [2022-11-23 03:27:27,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1253 transitions. [2022-11-23 03:27:27,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:27,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1253 transitions. [2022-11-23 03:27:27,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:27,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:27,456 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:27,456 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 64 flow. Second operand 12 states and 1253 transitions. [2022-11-23 03:27:27,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 83 transitions, 386 flow [2022-11-23 03:27:27,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 83 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:27:27,461 INFO L231 Difference]: Finished difference. Result has 43 places, 23 transitions, 147 flow [2022-11-23 03:27:27,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=23} [2022-11-23 03:27:27,462 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2022-11-23 03:27:27,463 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 23 transitions, 147 flow [2022-11-23 03:27:27,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:27,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:27,464 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-23 03:27:27,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:27:27,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:27,675 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1519272671, now seen corresponding path program 2 times [2022-11-23 03:27:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:27,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367324890] [2022-11-23 03:27:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:27,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:27,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:27,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367324890] [2022-11-23 03:27:27,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367324890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:27:27,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66328314] [2022-11-23 03:27:27,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:27:27,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:27,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:27:27,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:27:27,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:27:28,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:27:28,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:27:28,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:27:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:27:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:28,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:27:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:28,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66328314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:27:28,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:27:28,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 03:27:28,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182841869] [2022-11-23 03:27:28,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:27:28,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 03:27:28,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:28,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 03:27:28,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-23 03:27:28,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-11-23 03:27:28,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 23 transitions, 147 flow. Second operand has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:28,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:28,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-11-23 03:27:28,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:28,749 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-11-23 03:27:28,749 INFO L131 PetriNetUnfolder]: For 4203/4203 co-relation queries the response was YES. [2022-11-23 03:27:28,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 689 events. 457/689 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1641 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2127. Up to 190 conditions per place. [2022-11-23 03:27:28,755 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-11-23 03:27:28,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 167 transitions, 841 flow [2022-11-23 03:27:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 03:27:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 03:27:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2507 transitions. [2022-11-23 03:27:28,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4622050147492625 [2022-11-23 03:27:28,763 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2507 transitions. [2022-11-23 03:27:28,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2507 transitions. [2022-11-23 03:27:28,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:28,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2507 transitions. [2022-11-23 03:27:28,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 104.45833333333333) internal successors, (2507), 24 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:28,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:28,785 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:28,785 INFO L175 Difference]: Start difference. First operand has 43 places, 23 transitions, 147 flow. Second operand 24 states and 2507 transitions. [2022-11-23 03:27:28,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 167 transitions, 841 flow [2022-11-23 03:27:28,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 167 transitions, 769 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-23 03:27:28,794 INFO L231 Difference]: Finished difference. Result has 73 places, 35 transitions, 267 flow [2022-11-23 03:27:28,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=35} [2022-11-23 03:27:28,797 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 50 predicate places. [2022-11-23 03:27:28,797 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 35 transitions, 267 flow [2022-11-23 03:27:28,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:28,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:28,798 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-23 03:27:28,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 03:27:29,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:29,004 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1646379041, now seen corresponding path program 3 times [2022-11-23 03:27:29,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:29,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598803732] [2022-11-23 03:27:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:29,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:29,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598803732] [2022-11-23 03:27:29,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598803732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:27:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768900239] [2022-11-23 03:27:29,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:27:29,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:29,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:27:29,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:27:29,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:27:29,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-23 03:27:29,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:27:29,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 03:27:29,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:27:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:29,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:27:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:30,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768900239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:27:30,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:27:30,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2022-11-23 03:27:30,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675957528] [2022-11-23 03:27:30,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:27:30,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 03:27:30,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 03:27:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-11-23 03:27:30,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-11-23 03:27:30,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 35 transitions, 267 flow. Second operand has 29 states, 29 states have (on average 98.20689655172414) internal successors, (2848), 29 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:30,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:30,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-11-23 03:27:30,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:30,602 INFO L130 PetriNetUnfolder]: 529/797 cut-off events. [2022-11-23 03:27:30,602 INFO L131 PetriNetUnfolder]: For 9333/9333 co-relation queries the response was YES. [2022-11-23 03:27:30,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2586 conditions, 797 events. 529/797 cut-off events. For 9333/9333 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1908 event pairs, 20 based on Foata normal form. 36/657 useless extension candidates. Maximal degree in co-relation 2559. Up to 178 conditions per place. [2022-11-23 03:27:30,609 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 168 selfloop transitions, 27 changer transitions 0/195 dead transitions. [2022-11-23 03:27:30,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 195 transitions, 1001 flow [2022-11-23 03:27:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 03:27:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-23 03:27:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2915 transitions. [2022-11-23 03:27:30,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4606510745891277 [2022-11-23 03:27:30,617 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2915 transitions. [2022-11-23 03:27:30,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2915 transitions. [2022-11-23 03:27:30,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:30,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2915 transitions. [2022-11-23 03:27:30,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 104.10714285714286) internal successors, (2915), 28 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:30,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:30,637 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:30,637 INFO L175 Difference]: Start difference. First operand has 73 places, 35 transitions, 267 flow. Second operand 28 states and 2915 transitions. [2022-11-23 03:27:30,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 195 transitions, 1001 flow [2022-11-23 03:27:30,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 195 transitions, 897 flow, removed 41 selfloop flow, removed 11 redundant places. [2022-11-23 03:27:30,686 INFO L231 Difference]: Finished difference. Result has 93 places, 39 transitions, 267 flow [2022-11-23 03:27:30,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=267, PETRI_PLACES=93, PETRI_TRANSITIONS=39} [2022-11-23 03:27:30,687 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 70 predicate places. [2022-11-23 03:27:30,687 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 39 transitions, 267 flow [2022-11-23 03:27:30,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.20689655172414) internal successors, (2848), 29 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:30,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:30,689 INFO L209 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2022-11-23 03:27:30,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:27:30,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 03:27:30,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:27:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash -43990751, now seen corresponding path program 4 times [2022-11-23 03:27:30,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:27:30,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435530774] [2022-11-23 03:27:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:30,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:27:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:33,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:27:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435530774] [2022-11-23 03:27:33,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435530774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:27:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698427027] [2022-11-23 03:27:33,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:27:33,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:27:33,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:27:33,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:27:33,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:27:33,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:27:33,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:27:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-23 03:27:33,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:27:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:35,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:27:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:37,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698427027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:27:37,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:27:37,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-11-23 03:27:37,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415492670] [2022-11-23 03:27:37,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:27:37,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-23 03:27:37,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:27:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-23 03:27:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=5584, Unknown=0, NotChecked=0, Total=6806 [2022-11-23 03:27:40,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-11-23 03:27:40,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 39 transitions, 267 flow. Second operand has 83 states, 83 states have (on average 93.1566265060241) internal successors, (7732), 83 states have internal predecessors, (7732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:40,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:40,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-11-23 03:27:40,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:29:32,427 INFO L130 PetriNetUnfolder]: 110579/165890 cut-off events. [2022-11-23 03:29:32,428 INFO L131 PetriNetUnfolder]: For 1033138/1033138 co-relation queries the response was YES. [2022-11-23 03:29:33,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533498 conditions, 165890 events. 110579/165890 cut-off events. For 1033138/1033138 co-relation queries the response was YES. Maximal size of possible extension queue 2948. Compared 1271019 event pairs, 109 based on Foata normal form. 225/124669 useless extension candidates. Maximal degree in co-relation 533467. Up to 34573 conditions per place. [2022-11-23 03:29:34,229 INFO L137 encePairwiseOnDemand]: 221/226 looper letters, 2034 selfloop transitions, 7337 changer transitions 0/9371 dead transitions. [2022-11-23 03:29:34,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 9371 transitions, 87544 flow [2022-11-23 03:29:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 407 states. [2022-11-23 03:29:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2022-11-23 03:29:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 40697 transitions. [2022-11-23 03:29:34,308 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44244526102933185 [2022-11-23 03:29:34,308 INFO L72 ComplementDD]: Start complementDD. Operand 407 states and 40697 transitions. [2022-11-23 03:29:34,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 40697 transitions. [2022-11-23 03:29:34,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:29:34,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 407 states and 40697 transitions. [2022-11-23 03:29:34,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 408 states, 407 states have (on average 99.992628992629) internal successors, (40697), 407 states have internal predecessors, (40697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:34,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 408 states, 408 states have (on average 226.0) internal successors, (92208), 408 states have internal predecessors, (92208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:34,573 INFO L81 ComplementDD]: Finished complementDD. Result has 408 states, 408 states have (on average 226.0) internal successors, (92208), 408 states have internal predecessors, (92208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:34,574 INFO L175 Difference]: Start difference. First operand has 93 places, 39 transitions, 267 flow. Second operand 407 states and 40697 transitions. [2022-11-23 03:29:34,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 9371 transitions, 87544 flow [2022-11-23 03:29:57,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 9371 transitions, 68646 flow, removed 4711 selfloop flow, removed 23 redundant places. [2022-11-23 03:29:57,268 INFO L231 Difference]: Finished difference. Result has 506 places, 7376 transitions, 44427 flow [2022-11-23 03:29:57,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=407, PETRI_FLOW=44427, PETRI_PLACES=506, PETRI_TRANSITIONS=7376} [2022-11-23 03:29:57,269 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 483 predicate places. [2022-11-23 03:29:57,269 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 7376 transitions, 44427 flow [2022-11-23 03:29:57,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 93.1566265060241) internal successors, (7732), 83 states have internal predecessors, (7732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:57,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:29:57,272 INFO L209 CegarLoopForPetriNet]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:57,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:29:57,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:57,479 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:29:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1798697111, now seen corresponding path program 1 times [2022-11-23 03:29:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:57,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067733713] [2022-11-23 03:29:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:59,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067733713] [2022-11-23 03:29:59,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067733713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:29:59,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855212879] [2022-11-23 03:29:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:59,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:29:59,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:29:59,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafa3651-d3e3-4df8-a779-8fb2f8032f44/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:30:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:30:00,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-23 03:30:00,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:30:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 254 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:30:02,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:30:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:30:04,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855212879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:30:04,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:30:04,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2022-11-23 03:30:04,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893145362] [2022-11-23 03:30:04,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:30:04,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-23 03:30:04,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:30:04,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-23 03:30:04,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=6558, Unknown=0, NotChecked=0, Total=7832 [2022-11-23 03:30:07,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-11-23 03:30:07,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 7376 transitions, 44427 flow. Second operand has 89 states, 89 states have (on average 93.17977528089888) internal successors, (8293), 89 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:30:07,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:30:07,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-11-23 03:30:07,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand