./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/singleton_with-uninit-problems.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/singleton_with-uninit-problems.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8 --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 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 --- 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-2329fc7 [2022-12-13 13:07:09,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:07:09,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:07:09,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:07:09,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:07:09,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:07:09,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:07:09,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:07:09,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:07:09,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:07:09,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:07:09,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:07:09,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:07:09,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:07:09,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:07:09,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:07:09,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:07:09,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:07:09,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:07:09,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:07:09,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:07:09,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:07:09,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:07:09,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:07:09,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:07:09,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:07:09,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:07:09,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:07:09,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:07:09,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:07:09,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:07:09,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:07:09,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:07:09,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:07:09,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:07:09,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:07:09,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:07:09,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:07:09,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:07:09,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:07:09,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:07:09,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:07:09,251 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:07:09,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:07:09,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:07:09,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:07:09,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:07:09,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:07:09,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:07:09,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:07:09,253 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:07:09,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:07:09,254 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:07:09,254 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:07:09,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:07:09,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:07:09,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:07:09,254 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:07:09,255 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:07:09,255 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:07:09,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:07:09,255 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:07:09,255 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:07:09,255 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:07:09,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:07:09,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:07:09,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:07:09,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:07:09,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:07:09,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:07:09,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:07:09,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:07:09,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:07:09,257 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:07:09,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:07:09,258 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:07:09,258 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_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 [2022-12-13 13:07:09,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:07:09,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:07:09,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:07:09,441 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:07:09,441 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:07:09,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/singleton_with-uninit-problems.i [2022-12-13 13:07:11,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:07:12,183 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:07:12,184 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/sv-benchmarks/c/pthread/singleton_with-uninit-problems.i [2022-12-13 13:07:12,194 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/data/667a4c25f/bb6ce114ddf94719a3376a684f8965be/FLAGcd4058f26 [2022-12-13 13:07:12,563 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/data/667a4c25f/bb6ce114ddf94719a3376a684f8965be [2022-12-13 13:07:12,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:07:12,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:07:12,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:07:12,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:07:12,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:07:12,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:07:12" (1/1) ... [2022-12-13 13:07:12,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6abb01fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:12, skipping insertion in model container [2022-12-13 13:07:12,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:07:12" (1/1) ... [2022-12-13 13:07:12,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:07:12,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:07:12,761 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:07:12,912 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_312ef1cb-b048-46f2-854b-e705b8beddc3/sv-benchmarks/c/pthread/singleton_with-uninit-problems.i[55568,55581] [2022-12-13 13:07:12,917 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:07:12,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:07:12,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:07:12,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:07:12,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:07:12,936 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:07:12,946 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:07:12,961 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_312ef1cb-b048-46f2-854b-e705b8beddc3/sv-benchmarks/c/pthread/singleton_with-uninit-problems.i[55568,55581] [2022-12-13 13:07:12,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:07:12,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:07:12,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:07:12,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:07:12,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:07:13,010 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:07:13,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13 WrapperNode [2022-12-13 13:07:13,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:07:13,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:07:13,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:07:13,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:07:13,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,043 INFO L138 Inliner]: procedures = 325, calls = 53, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2022-12-13 13:07:13,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:07:13,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:07:13,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:07:13,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:07:13,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,068 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:07:13,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:07:13,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:07:13,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:07:13,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (1/1) ... [2022-12-13 13:07:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:07:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:07:13,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:07:13,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:07:13,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 13:07:13,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:07:13,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:07:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 13:07:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:07:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-12-13 13:07:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-12-13 13:07:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 13:07:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 13:07:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 13:07:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 13:07:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 13:07:13,127 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 13:07:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:07:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:07:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:07:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:07:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:07:13,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:07:13,129 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:07:13,233 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:07:13,234 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:07:13,480 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:07:13,485 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:07:13,485 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 13:07:13,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:07:13 BoogieIcfgContainer [2022-12-13 13:07:13,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:07:13,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:07:13,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:07:13,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:07:13,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:07:12" (1/3) ... [2022-12-13 13:07:13,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48896132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:07:13, skipping insertion in model container [2022-12-13 13:07:13,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:13" (2/3) ... [2022-12-13 13:07:13,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48896132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:07:13, skipping insertion in model container [2022-12-13 13:07:13,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:07:13" (3/3) ... [2022-12-13 13:07:13,493 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton_with-uninit-problems.i [2022-12-13 13:07:13,507 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:07:13,507 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-13 13:07:13,508 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:07:13,599 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2022-12-13 13:07:13,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 257 transitions, 621 flow [2022-12-13 13:07:13,671 INFO L130 PetriNetUnfolder]: 7/178 cut-off events. [2022-12-13 13:07:13,671 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:07:13,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 178 events. 7/178 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 187 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 149. Up to 3 conditions per place. [2022-12-13 13:07:13,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 257 transitions, 621 flow [2022-12-13 13:07:13,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 173 transitions, 397 flow [2022-12-13 13:07:13,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:07:13,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 173 transitions, 397 flow [2022-12-13 13:07:13,692 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 173 transitions, 397 flow [2022-12-13 13:07:13,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 173 transitions, 397 flow [2022-12-13 13:07:13,717 INFO L130 PetriNetUnfolder]: 7/173 cut-off events. [2022-12-13 13:07:13,717 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:07:13,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 173 events. 7/173 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 185 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 144. Up to 3 conditions per place. [2022-12-13 13:07:13,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2022-12-13 13:07:16,713 INFO L134 LiptonReduction]: Checked pairs total: 7349 [2022-12-13 13:07:16,713 INFO L136 LiptonReduction]: Total number of compositions: 149 [2022-12-13 13:07:16,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:07:16,733 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;@5c6d6117, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:07:16,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2022-12-13 13:07:16,734 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 13:07:16,734 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:07:16,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:16,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 13:07:16,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:16,739 INFO L85 PathProgramCache]: Analyzing trace with hash 665, now seen corresponding path program 1 times [2022-12-13 13:07:16,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:16,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822515133] [2022-12-13 13:07:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:16,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:16,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822515133] [2022-12-13 13:07:16,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822515133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:16,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:16,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 13:07:16,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761103655] [2022-12-13 13:07:16,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:16,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:07:16,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:16,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:07:16,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:07:16,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 408 [2022-12-13 13:07:16,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 225 flow. Second operand has 2 states, 2 states have (on average 226.5) internal successors, (453), 2 states have internal predecessors, (453), 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) [2022-12-13 13:07:16,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:16,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 408 [2022-12-13 13:07:16,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:18,792 INFO L130 PetriNetUnfolder]: 19442/26684 cut-off events. [2022-12-13 13:07:18,792 INFO L131 PetriNetUnfolder]: For 1153/1153 co-relation queries the response was YES. [2022-12-13 13:07:18,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53387 conditions, 26684 events. 19442/26684 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145195 event pairs, 19098 based on Foata normal form. 0/9507 useless extension candidates. Maximal degree in co-relation 53362. Up to 25317 conditions per place. [2022-12-13 13:07:19,014 INFO L137 encePairwiseOnDemand]: 404/408 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-12-13 13:07:19,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2022-12-13 13:07:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:07:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 13:07:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 521 transitions. [2022-12-13 13:07:19,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6384803921568627 [2022-12-13 13:07:19,029 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 521 transitions. [2022-12-13 13:07:19,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 521 transitions. [2022-12-13 13:07:19,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:19,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 521 transitions. [2022-12-13 13:07:19,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 260.5) internal successors, (521), 2 states have internal predecessors, (521), 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) [2022-12-13 13:07:19,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 408.0) internal successors, (1224), 3 states have internal predecessors, (1224), 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) [2022-12-13 13:07:19,046 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 408.0) internal successors, (1224), 3 states have internal predecessors, (1224), 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) [2022-12-13 13:07:19,047 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 225 flow. Second operand 2 states and 521 transitions. [2022-12-13 13:07:19,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2022-12-13 13:07:19,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 13:07:19,069 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2022-12-13 13:07:19,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2022-12-13 13:07:19,074 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2022-12-13 13:07:19,074 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2022-12-13 13:07:19,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 226.5) internal successors, (453), 2 states have internal predecessors, (453), 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) [2022-12-13 13:07:19,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:19,075 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:07:19,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:07:19,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 652828, now seen corresponding path program 1 times [2022-12-13 13:07:19,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:19,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521592815] [2022-12-13 13:07:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:19,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:19,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:19,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521592815] [2022-12-13 13:07:19,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521592815] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:19,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:19,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:07:19,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93293890] [2022-12-13 13:07:19,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:19,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:07:19,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:19,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:07:19,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:07:19,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 408 [2022-12-13 13:07:19,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2022-12-13 13:07:19,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:19,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 408 [2022-12-13 13:07:19,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:21,319 INFO L130 PetriNetUnfolder]: 23211/32262 cut-off events. [2022-12-13 13:07:21,319 INFO L131 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2022-12-13 13:07:21,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63265 conditions, 32262 events. 23211/32262 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 2114. Compared 186213 event pairs, 19840 based on Foata normal form. 0/11517 useless extension candidates. Maximal degree in co-relation 63262. Up to 23874 conditions per place. [2022-12-13 13:07:21,502 INFO L137 encePairwiseOnDemand]: 396/408 looper letters, 121 selfloop transitions, 11 changer transitions 0/147 dead transitions. [2022-12-13 13:07:21,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 147 transitions, 591 flow [2022-12-13 13:07:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:07:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:07:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 772 transitions. [2022-12-13 13:07:21,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.630718954248366 [2022-12-13 13:07:21,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 772 transitions. [2022-12-13 13:07:21,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 772 transitions. [2022-12-13 13:07:21,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:21,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 772 transitions. [2022-12-13 13:07:21,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 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) [2022-12-13 13:07:21,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:21,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:21,513 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 772 transitions. [2022-12-13 13:07:21,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 147 transitions, 591 flow [2022-12-13 13:07:21,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 591 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:07:21,517 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 265 flow [2022-12-13 13:07:21,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2022-12-13 13:07:21,518 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -11 predicate places. [2022-12-13 13:07:21,518 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 265 flow [2022-12-13 13:07:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2022-12-13 13:07:21,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:21,519 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:07:21,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:07:21,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash 652827, now seen corresponding path program 1 times [2022-12-13 13:07:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:21,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725949929] [2022-12-13 13:07:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:21,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725949929] [2022-12-13 13:07:21,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725949929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:21,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:21,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:07:21,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032028510] [2022-12-13 13:07:21,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:21,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:07:21,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:07:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:07:21,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 408 [2022-12-13 13:07:21,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 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) [2022-12-13 13:07:21,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:21,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 408 [2022-12-13 13:07:21,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:23,124 INFO L130 PetriNetUnfolder]: 17985/25242 cut-off events. [2022-12-13 13:07:23,124 INFO L131 PetriNetUnfolder]: For 6158/6158 co-relation queries the response was YES. [2022-12-13 13:07:23,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53936 conditions, 25242 events. 17985/25242 cut-off events. For 6158/6158 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143878 event pairs, 17620 based on Foata normal form. 1462/12457 useless extension candidates. Maximal degree in co-relation 53931. Up to 23826 conditions per place. [2022-12-13 13:07:23,216 INFO L137 encePairwiseOnDemand]: 399/408 looper letters, 74 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2022-12-13 13:07:23,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 103 transitions, 462 flow [2022-12-13 13:07:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:07:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:07:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2022-12-13 13:07:23,218 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5727124183006536 [2022-12-13 13:07:23,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2022-12-13 13:07:23,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2022-12-13 13:07:23,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:23,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2022-12-13 13:07:23,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 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) [2022-12-13 13:07:23,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:23,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:23,221 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 265 flow. Second operand 3 states and 701 transitions. [2022-12-13 13:07:23,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 103 transitions, 462 flow [2022-12-13 13:07:23,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 103 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:07:23,228 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 305 flow [2022-12-13 13:07:23,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2022-12-13 13:07:23,228 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -9 predicate places. [2022-12-13 13:07:23,228 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 305 flow [2022-12-13 13:07:23,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 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) [2022-12-13 13:07:23,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:23,229 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:07:23,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:07:23,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash 20235993, now seen corresponding path program 1 times [2022-12-13 13:07:23,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:23,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605684583] [2022-12-13 13:07:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:23,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:23,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605684583] [2022-12-13 13:07:23,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605684583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:23,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:23,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:07:23,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303507063] [2022-12-13 13:07:23,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:23,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:07:23,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:23,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:07:23,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:07:23,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 408 [2022-12-13 13:07:23,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 305 flow. Second operand has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 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) [2022-12-13 13:07:23,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:23,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 408 [2022-12-13 13:07:23,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:25,340 INFO L130 PetriNetUnfolder]: 17971/24878 cut-off events. [2022-12-13 13:07:25,340 INFO L131 PetriNetUnfolder]: For 6160/6162 co-relation queries the response was YES. [2022-12-13 13:07:25,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53574 conditions, 24878 events. 17971/24878 cut-off events. For 6160/6162 co-relation queries the response was YES. Maximal size of possible extension queue 1698. Compared 143230 event pairs, 12478 based on Foata normal form. 11/10814 useless extension candidates. Maximal degree in co-relation 53568. Up to 17132 conditions per place. [2022-12-13 13:07:25,460 INFO L137 encePairwiseOnDemand]: 403/408 looper letters, 133 selfloop transitions, 7 changer transitions 0/155 dead transitions. [2022-12-13 13:07:25,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 155 transitions, 730 flow [2022-12-13 13:07:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:07:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:07:25,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 979 transitions. [2022-12-13 13:07:25,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5998774509803921 [2022-12-13 13:07:25,463 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 979 transitions. [2022-12-13 13:07:25,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 979 transitions. [2022-12-13 13:07:25,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:25,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 979 transitions. [2022-12-13 13:07:25,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 244.75) internal successors, (979), 4 states have internal predecessors, (979), 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) [2022-12-13 13:07:25,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:25,469 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:25,469 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 305 flow. Second operand 4 states and 979 transitions. [2022-12-13 13:07:25,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 155 transitions, 730 flow [2022-12-13 13:07:25,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 155 transitions, 712 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:07:25,477 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 323 flow [2022-12-13 13:07:25,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=323, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2022-12-13 13:07:25,478 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -6 predicate places. [2022-12-13 13:07:25,478 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 323 flow [2022-12-13 13:07:25,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 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) [2022-12-13 13:07:25,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:25,478 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:25,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:07:25,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash 739442340, now seen corresponding path program 1 times [2022-12-13 13:07:25,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:25,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086053705] [2022-12-13 13:07:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:25,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:25,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:25,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086053705] [2022-12-13 13:07:25,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086053705] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:25,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:25,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:07:25,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494669274] [2022-12-13 13:07:25,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:25,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:07:25,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:07:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:07:25,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 408 [2022-12-13 13:07:25,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2022-12-13 13:07:25,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:25,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 408 [2022-12-13 13:07:25,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:27,177 INFO L130 PetriNetUnfolder]: 17965/25201 cut-off events. [2022-12-13 13:07:27,177 INFO L131 PetriNetUnfolder]: For 13480/13480 co-relation queries the response was YES. [2022-12-13 13:07:27,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58253 conditions, 25201 events. 17965/25201 cut-off events. For 13480/13480 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143712 event pairs, 17602 based on Foata normal form. 0/10969 useless extension candidates. Maximal degree in co-relation 58246. Up to 23779 conditions per place. [2022-12-13 13:07:27,321 INFO L137 encePairwiseOnDemand]: 404/408 looper letters, 75 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2022-12-13 13:07:27,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 473 flow [2022-12-13 13:07:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:07:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:07:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2022-12-13 13:07:27,325 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5678104575163399 [2022-12-13 13:07:27,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2022-12-13 13:07:27,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2022-12-13 13:07:27,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:27,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2022-12-13 13:07:27,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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) [2022-12-13 13:07:27,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:27,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:27,332 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 323 flow. Second operand 3 states and 695 transitions. [2022-12-13 13:07:27,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 473 flow [2022-12-13 13:07:27,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 470 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:07:27,340 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 314 flow [2022-12-13 13:07:27,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2022-12-13 13:07:27,341 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -7 predicate places. [2022-12-13 13:07:27,341 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 314 flow [2022-12-13 13:07:27,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2022-12-13 13:07:27,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:27,342 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:27,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:07:27,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash 739442341, now seen corresponding path program 1 times [2022-12-13 13:07:27,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:27,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928008598] [2022-12-13 13:07:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:27,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:27,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928008598] [2022-12-13 13:07:27,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928008598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:27,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:27,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:07:27,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649624278] [2022-12-13 13:07:27,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:27,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:07:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:07:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:07:27,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 408 [2022-12-13 13:07:27,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 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) [2022-12-13 13:07:27,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:27,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 408 [2022-12-13 13:07:27,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:29,119 INFO L130 PetriNetUnfolder]: 17958/25184 cut-off events. [2022-12-13 13:07:29,119 INFO L131 PetriNetUnfolder]: For 13439/13439 co-relation queries the response was YES. [2022-12-13 13:07:29,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58201 conditions, 25184 events. 17958/25184 cut-off events. For 13439/13439 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143594 event pairs, 17593 based on Foata normal form. 0/10962 useless extension candidates. Maximal degree in co-relation 58193. Up to 23762 conditions per place. [2022-12-13 13:07:29,225 INFO L137 encePairwiseOnDemand]: 403/408 looper letters, 73 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2022-12-13 13:07:29,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 483 flow [2022-12-13 13:07:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:07:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:07:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 893 transitions. [2022-12-13 13:07:29,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5471813725490197 [2022-12-13 13:07:29,229 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 893 transitions. [2022-12-13 13:07:29,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 893 transitions. [2022-12-13 13:07:29,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:29,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 893 transitions. [2022-12-13 13:07:29,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 223.25) internal successors, (893), 4 states have internal predecessors, (893), 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) [2022-12-13 13:07:29,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:29,234 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:29,234 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 314 flow. Second operand 4 states and 893 transitions. [2022-12-13 13:07:29,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 483 flow [2022-12-13 13:07:29,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 479 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:07:29,243 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 308 flow [2022-12-13 13:07:29,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2022-12-13 13:07:29,244 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -8 predicate places. [2022-12-13 13:07:29,244 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 308 flow [2022-12-13 13:07:29,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 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) [2022-12-13 13:07:29,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:29,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:29,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:07:29,245 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:29,246 INFO L85 PathProgramCache]: Analyzing trace with hash -186920044, now seen corresponding path program 1 times [2022-12-13 13:07:29,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:29,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754018511] [2022-12-13 13:07:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:29,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:29,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:29,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754018511] [2022-12-13 13:07:29,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754018511] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:29,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:29,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:07:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269358998] [2022-12-13 13:07:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:29,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:07:29,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:07:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:07:30,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 408 [2022-12-13 13:07:30,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 202.125) internal successors, (1617), 8 states have internal predecessors, (1617), 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) [2022-12-13 13:07:30,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:30,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 408 [2022-12-13 13:07:30,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:31,042 INFO L130 PetriNetUnfolder]: 12743/18173 cut-off events. [2022-12-13 13:07:31,042 INFO L131 PetriNetUnfolder]: For 13360/13360 co-relation queries the response was YES. [2022-12-13 13:07:31,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41511 conditions, 18173 events. 12743/18173 cut-off events. For 13360/13360 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102199 event pairs, 12473 based on Foata normal form. 1457/8961 useless extension candidates. Maximal degree in co-relation 41503. Up to 17103 conditions per place. [2022-12-13 13:07:31,106 INFO L137 encePairwiseOnDemand]: 398/408 looper letters, 65 selfloop transitions, 11 changer transitions 0/97 dead transitions. [2022-12-13 13:07:31,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 97 transitions, 472 flow [2022-12-13 13:07:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:07:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:07:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1078 transitions. [2022-12-13 13:07:31,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5284313725490196 [2022-12-13 13:07:31,109 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1078 transitions. [2022-12-13 13:07:31,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1078 transitions. [2022-12-13 13:07:31,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:31,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1078 transitions. [2022-12-13 13:07:31,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 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) [2022-12-13 13:07:31,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 408.0) internal successors, (2448), 6 states have internal predecessors, (2448), 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) [2022-12-13 13:07:31,113 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 408.0) internal successors, (2448), 6 states have internal predecessors, (2448), 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) [2022-12-13 13:07:31,114 INFO L175 Difference]: Start difference. First operand has 93 places, 93 transitions, 308 flow. Second operand 5 states and 1078 transitions. [2022-12-13 13:07:31,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 97 transitions, 472 flow [2022-12-13 13:07:31,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 97 transitions, 461 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 13:07:31,118 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 337 flow [2022-12-13 13:07:31,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2022-12-13 13:07:31,118 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -7 predicate places. [2022-12-13 13:07:31,119 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 337 flow [2022-12-13 13:07:31,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 202.125) internal successors, (1617), 8 states have internal predecessors, (1617), 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) [2022-12-13 13:07:31,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:31,119 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:31,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:07:31,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2038352585, now seen corresponding path program 1 times [2022-12-13 13:07:31,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:31,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89443132] [2022-12-13 13:07:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:31,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:31,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:31,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89443132] [2022-12-13 13:07:31,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89443132] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:31,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:31,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:07:31,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374190210] [2022-12-13 13:07:31,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:31,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:07:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:07:31,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:07:31,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 408 [2022-12-13 13:07:31,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 207.83333333333334) internal successors, (1247), 6 states have internal predecessors, (1247), 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) [2022-12-13 13:07:31,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:31,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 408 [2022-12-13 13:07:31,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:32,416 INFO L130 PetriNetUnfolder]: 7621/11509 cut-off events. [2022-12-13 13:07:32,416 INFO L131 PetriNetUnfolder]: For 5933/5933 co-relation queries the response was YES. [2022-12-13 13:07:32,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26148 conditions, 11509 events. 7621/11509 cut-off events. For 5933/5933 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 65973 event pairs, 7348 based on Foata normal form. 0/5454 useless extension candidates. Maximal degree in co-relation 26139. Up to 10435 conditions per place. [2022-12-13 13:07:32,455 INFO L137 encePairwiseOnDemand]: 401/408 looper letters, 68 selfloop transitions, 5 changer transitions 0/92 dead transitions. [2022-12-13 13:07:32,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 501 flow [2022-12-13 13:07:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:07:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:07:32,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 888 transitions. [2022-12-13 13:07:32,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2022-12-13 13:07:32,458 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 888 transitions. [2022-12-13 13:07:32,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 888 transitions. [2022-12-13 13:07:32,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:32,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 888 transitions. [2022-12-13 13:07:32,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 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) [2022-12-13 13:07:32,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:32,461 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:32,461 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 337 flow. Second operand 4 states and 888 transitions. [2022-12-13 13:07:32,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 501 flow [2022-12-13 13:07:32,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 494 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:07:32,466 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 332 flow [2022-12-13 13:07:32,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2022-12-13 13:07:32,466 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -10 predicate places. [2022-12-13 13:07:32,466 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 332 flow [2022-12-13 13:07:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 207.83333333333334) internal successors, (1247), 6 states have internal predecessors, (1247), 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) [2022-12-13 13:07:32,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:32,467 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:32,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:07:32,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:32,467 INFO L85 PathProgramCache]: Analyzing trace with hash 351760211, now seen corresponding path program 1 times [2022-12-13 13:07:32,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:32,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571479470] [2022-12-13 13:07:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:32,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:32,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571479470] [2022-12-13 13:07:32,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571479470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:32,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:32,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:07:32,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590184631] [2022-12-13 13:07:32,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:32,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:07:32,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:32,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:07:32,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:07:32,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 408 [2022-12-13 13:07:32,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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) [2022-12-13 13:07:32,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:32,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 408 [2022-12-13 13:07:32,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:33,435 INFO L130 PetriNetUnfolder]: 8104/11788 cut-off events. [2022-12-13 13:07:33,435 INFO L131 PetriNetUnfolder]: For 6250/6250 co-relation queries the response was YES. [2022-12-13 13:07:33,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27336 conditions, 11788 events. 8104/11788 cut-off events. For 6250/6250 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 63016 event pairs, 7834 based on Foata normal form. 0/5847 useless extension candidates. Maximal degree in co-relation 27327. Up to 11097 conditions per place. [2022-12-13 13:07:33,468 INFO L137 encePairwiseOnDemand]: 404/408 looper letters, 68 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2022-12-13 13:07:33,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 88 transitions, 478 flow [2022-12-13 13:07:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:07:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:07:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2022-12-13 13:07:33,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5612745098039216 [2022-12-13 13:07:33,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2022-12-13 13:07:33,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2022-12-13 13:07:33,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:33,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2022-12-13 13:07:33,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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) [2022-12-13 13:07:33,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:33,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:33,473 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 332 flow. Second operand 3 states and 687 transitions. [2022-12-13 13:07:33,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 88 transitions, 478 flow [2022-12-13 13:07:33,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 468 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:07:33,476 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 324 flow [2022-12-13 13:07:33,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2022-12-13 13:07:33,477 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -13 predicate places. [2022-12-13 13:07:33,477 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 324 flow [2022-12-13 13:07:33,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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) [2022-12-13 13:07:33,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:33,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:33,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:07:33,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:33,478 INFO L85 PathProgramCache]: Analyzing trace with hash 351760213, now seen corresponding path program 1 times [2022-12-13 13:07:33,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:33,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188818283] [2022-12-13 13:07:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:33,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:33,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:33,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188818283] [2022-12-13 13:07:33,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188818283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:33,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:33,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:07:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578235109] [2022-12-13 13:07:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:07:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:07:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:07:33,852 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 408 [2022-12-13 13:07:33,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 208.6) internal successors, (1043), 5 states have internal predecessors, (1043), 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) [2022-12-13 13:07:33,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:33,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 408 [2022-12-13 13:07:33,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:34,570 INFO L130 PetriNetUnfolder]: 8091/11571 cut-off events. [2022-12-13 13:07:34,570 INFO L131 PetriNetUnfolder]: For 6226/6226 co-relation queries the response was YES. [2022-12-13 13:07:34,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27073 conditions, 11571 events. 8091/11571 cut-off events. For 6226/6226 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 59633 event pairs, 7819 based on Foata normal form. 0/5648 useless extension candidates. Maximal degree in co-relation 27064. Up to 11072 conditions per place. [2022-12-13 13:07:34,610 INFO L137 encePairwiseOnDemand]: 403/408 looper letters, 67 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2022-12-13 13:07:34,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 490 flow [2022-12-13 13:07:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:07:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:07:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 885 transitions. [2022-12-13 13:07:34,612 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5422794117647058 [2022-12-13 13:07:34,612 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 885 transitions. [2022-12-13 13:07:34,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 885 transitions. [2022-12-13 13:07:34,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:34,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 885 transitions. [2022-12-13 13:07:34,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 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) [2022-12-13 13:07:34,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:34,615 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:34,615 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 324 flow. Second operand 4 states and 885 transitions. [2022-12-13 13:07:34,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 490 flow [2022-12-13 13:07:34,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 88 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:07:34,618 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 324 flow [2022-12-13 13:07:34,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=324, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2022-12-13 13:07:34,619 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -14 predicate places. [2022-12-13 13:07:34,619 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 324 flow [2022-12-13 13:07:34,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.6) internal successors, (1043), 5 states have internal predecessors, (1043), 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) [2022-12-13 13:07:34,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:34,619 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:34,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:07:34,620 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:34,620 INFO L85 PathProgramCache]: Analyzing trace with hash 351760167, now seen corresponding path program 1 times [2022-12-13 13:07:34,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:34,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078550292] [2022-12-13 13:07:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:34,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:34,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:34,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078550292] [2022-12-13 13:07:34,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078550292] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:34,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:34,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:07:34,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706580377] [2022-12-13 13:07:34,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:34,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:07:34,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:07:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:07:34,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 408 [2022-12-13 13:07:34,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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) [2022-12-13 13:07:34,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:34,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 408 [2022-12-13 13:07:34,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:35,074 INFO L130 PetriNetUnfolder]: 2561/4001 cut-off events. [2022-12-13 13:07:35,074 INFO L131 PetriNetUnfolder]: For 2327/2327 co-relation queries the response was YES. [2022-12-13 13:07:35,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9387 conditions, 4001 events. 2561/4001 cut-off events. For 2327/2327 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19201 event pairs, 2423 based on Foata normal form. 0/2434 useless extension candidates. Maximal degree in co-relation 9378. Up to 3657 conditions per place. [2022-12-13 13:07:35,086 INFO L137 encePairwiseOnDemand]: 402/408 looper letters, 66 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2022-12-13 13:07:35,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 452 flow [2022-12-13 13:07:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:07:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:07:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2022-12-13 13:07:35,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5678104575163399 [2022-12-13 13:07:35,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2022-12-13 13:07:35,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2022-12-13 13:07:35,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:35,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2022-12-13 13:07:35,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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) [2022-12-13 13:07:35,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:35,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:35,090 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 324 flow. Second operand 3 states and 695 transitions. [2022-12-13 13:07:35,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 452 flow [2022-12-13 13:07:35,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 81 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:07:35,092 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 308 flow [2022-12-13 13:07:35,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=308, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2022-12-13 13:07:35,093 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -20 predicate places. [2022-12-13 13:07:35,093 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 308 flow [2022-12-13 13:07:35,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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) [2022-12-13 13:07:35,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:35,093 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 13:07:35,093 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:35,094 INFO L85 PathProgramCache]: Analyzing trace with hash 353544104, now seen corresponding path program 1 times [2022-12-13 13:07:35,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:35,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354534009] [2022-12-13 13:07:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:35,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:35,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354534009] [2022-12-13 13:07:35,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354534009] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:35,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:35,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:07:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907754349] [2022-12-13 13:07:35,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:35,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:07:35,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:07:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:07:35,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 408 [2022-12-13 13:07:35,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2022-12-13 13:07:35,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:35,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 408 [2022-12-13 13:07:35,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:35,381 INFO L130 PetriNetUnfolder]: 565/1060 cut-off events. [2022-12-13 13:07:35,382 INFO L131 PetriNetUnfolder]: For 763/763 co-relation queries the response was YES. [2022-12-13 13:07:35,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 1060 events. 565/1060 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4173 event pairs, 502 based on Foata normal form. 0/900 useless extension candidates. Maximal degree in co-relation 2581. Up to 862 conditions per place. [2022-12-13 13:07:35,385 INFO L137 encePairwiseOnDemand]: 401/408 looper letters, 54 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2022-12-13 13:07:35,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 418 flow [2022-12-13 13:07:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:07:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:07:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2022-12-13 13:07:35,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5343137254901961 [2022-12-13 13:07:35,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2022-12-13 13:07:35,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2022-12-13 13:07:35,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:35,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2022-12-13 13:07:35,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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) [2022-12-13 13:07:35,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:35,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:35,389 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 308 flow. Second operand 3 states and 654 transitions. [2022-12-13 13:07:35,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 418 flow [2022-12-13 13:07:35,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:07:35,390 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 306 flow [2022-12-13 13:07:35,390 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2022-12-13 13:07:35,391 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -23 predicate places. [2022-12-13 13:07:35,391 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 306 flow [2022-12-13 13:07:35,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2022-12-13 13:07:35,391 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:35,391 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:35,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:07:35,391 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash 453526770, now seen corresponding path program 1 times [2022-12-13 13:07:35,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:35,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424617167] [2022-12-13 13:07:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:35,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:35,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:35,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424617167] [2022-12-13 13:07:35,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424617167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:35,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:35,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:07:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818338486] [2022-12-13 13:07:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:07:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:35,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:07:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:07:35,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 408 [2022-12-13 13:07:35,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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) [2022-12-13 13:07:35,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:35,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 408 [2022-12-13 13:07:35,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:35,689 INFO L130 PetriNetUnfolder]: 565/1036 cut-off events. [2022-12-13 13:07:35,689 INFO L131 PetriNetUnfolder]: For 765/765 co-relation queries the response was YES. [2022-12-13 13:07:35,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2581 conditions, 1036 events. 565/1036 cut-off events. For 765/765 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3930 event pairs, 505 based on Foata normal form. 0/915 useless extension candidates. Maximal degree in co-relation 2572. Up to 875 conditions per place. [2022-12-13 13:07:35,693 INFO L137 encePairwiseOnDemand]: 404/408 looper letters, 57 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2022-12-13 13:07:35,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 430 flow [2022-12-13 13:07:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:07:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:07:35,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2022-12-13 13:07:35,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5522875816993464 [2022-12-13 13:07:35,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2022-12-13 13:07:35,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2022-12-13 13:07:35,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:35,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2022-12-13 13:07:35,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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) [2022-12-13 13:07:35,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:35,696 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:35,696 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 306 flow. Second operand 3 states and 676 transitions. [2022-12-13 13:07:35,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 430 flow [2022-12-13 13:07:35,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 422 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:07:35,698 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 300 flow [2022-12-13 13:07:35,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2022-12-13 13:07:35,698 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -25 predicate places. [2022-12-13 13:07:35,698 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 300 flow [2022-12-13 13:07:35,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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) [2022-12-13 13:07:35,699 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:35,699 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 13:07:35,699 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:35,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1260837649, now seen corresponding path program 1 times [2022-12-13 13:07:35,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:35,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000664549] [2022-12-13 13:07:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:35,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:35,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:35,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000664549] [2022-12-13 13:07:35,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000664549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:35,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:35,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:07:35,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098275744] [2022-12-13 13:07:35,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:35,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:07:35,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:35,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:07:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:07:36,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 408 [2022-12-13 13:07:36,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 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) [2022-12-13 13:07:36,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:36,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 408 [2022-12-13 13:07:36,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:36,175 INFO L130 PetriNetUnfolder]: 549/996 cut-off events. [2022-12-13 13:07:36,176 INFO L131 PetriNetUnfolder]: For 730/730 co-relation queries the response was YES. [2022-12-13 13:07:36,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2491 conditions, 996 events. 549/996 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3690 event pairs, 488 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 2482. Up to 847 conditions per place. [2022-12-13 13:07:36,179 INFO L137 encePairwiseOnDemand]: 403/408 looper letters, 56 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2022-12-13 13:07:36,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 444 flow [2022-12-13 13:07:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:07:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:07:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 874 transitions. [2022-12-13 13:07:36,182 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5355392156862745 [2022-12-13 13:07:36,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 874 transitions. [2022-12-13 13:07:36,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 874 transitions. [2022-12-13 13:07:36,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:36,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 874 transitions. [2022-12-13 13:07:36,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 218.5) internal successors, (874), 4 states have internal predecessors, (874), 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) [2022-12-13 13:07:36,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:36,188 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:36,188 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 300 flow. Second operand 4 states and 874 transitions. [2022-12-13 13:07:36,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 444 flow [2022-12-13 13:07:36,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 438 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:07:36,191 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 300 flow [2022-12-13 13:07:36,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2022-12-13 13:07:36,192 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -26 predicate places. [2022-12-13 13:07:36,192 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 300 flow [2022-12-13 13:07:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 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) [2022-12-13 13:07:36,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:36,192 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:36,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 13:07:36,193 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:36,193 INFO L85 PathProgramCache]: Analyzing trace with hash -484189123, now seen corresponding path program 1 times [2022-12-13 13:07:36,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:36,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399051507] [2022-12-13 13:07:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:36,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:36,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399051507] [2022-12-13 13:07:36,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399051507] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:36,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:36,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:07:36,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521963159] [2022-12-13 13:07:36,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:36,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:07:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:07:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:07:36,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 408 [2022-12-13 13:07:36,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2022-12-13 13:07:36,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:36,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 408 [2022-12-13 13:07:36,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:36,479 INFO L130 PetriNetUnfolder]: 494/911 cut-off events. [2022-12-13 13:07:36,479 INFO L131 PetriNetUnfolder]: For 675/675 co-relation queries the response was YES. [2022-12-13 13:07:36,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2283 conditions, 911 events. 494/911 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3293 event pairs, 434 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 2274. Up to 758 conditions per place. [2022-12-13 13:07:36,482 INFO L137 encePairwiseOnDemand]: 404/408 looper letters, 53 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2022-12-13 13:07:36,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 416 flow [2022-12-13 13:07:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:07:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:07:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2022-12-13 13:07:36,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5498366013071896 [2022-12-13 13:07:36,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2022-12-13 13:07:36,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2022-12-13 13:07:36,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:36,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2022-12-13 13:07:36,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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) [2022-12-13 13:07:36,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:36,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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) [2022-12-13 13:07:36,485 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 300 flow. Second operand 3 states and 673 transitions. [2022-12-13 13:07:36,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 416 flow [2022-12-13 13:07:36,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:07:36,487 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 292 flow [2022-12-13 13:07:36,487 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2022-12-13 13:07:36,488 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -29 predicate places. [2022-12-13 13:07:36,488 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 292 flow [2022-12-13 13:07:36,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2022-12-13 13:07:36,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:36,488 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:36,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 13:07:36,488 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash -484189124, now seen corresponding path program 1 times [2022-12-13 13:07:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:36,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007317769] [2022-12-13 13:07:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:36,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:36,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:36,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007317769] [2022-12-13 13:07:36,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007317769] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:36,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:36,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:07:36,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484737718] [2022-12-13 13:07:36,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:36,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:07:36,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:36,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:07:36,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:07:36,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 408 [2022-12-13 13:07:36,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 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) [2022-12-13 13:07:36,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:36,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 408 [2022-12-13 13:07:36,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:36,903 INFO L130 PetriNetUnfolder]: 450/837 cut-off events. [2022-12-13 13:07:36,903 INFO L131 PetriNetUnfolder]: For 628/628 co-relation queries the response was YES. [2022-12-13 13:07:36,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2104 conditions, 837 events. 450/837 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2934 event pairs, 389 based on Foata normal form. 0/785 useless extension candidates. Maximal degree in co-relation 2095. Up to 690 conditions per place. [2022-12-13 13:07:36,905 INFO L137 encePairwiseOnDemand]: 403/408 looper letters, 52 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2022-12-13 13:07:36,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 428 flow [2022-12-13 13:07:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:07:36,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:07:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 871 transitions. [2022-12-13 13:07:36,907 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5337009803921569 [2022-12-13 13:07:36,907 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 871 transitions. [2022-12-13 13:07:36,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 871 transitions. [2022-12-13 13:07:36,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:36,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 871 transitions. [2022-12-13 13:07:36,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 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) [2022-12-13 13:07:36,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:36,909 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 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) [2022-12-13 13:07:36,910 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 292 flow. Second operand 4 states and 871 transitions. [2022-12-13 13:07:36,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 428 flow [2022-12-13 13:07:36,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 422 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:07:36,911 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 292 flow [2022-12-13 13:07:36,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2022-12-13 13:07:36,912 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -30 predicate places. [2022-12-13 13:07:36,912 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 292 flow [2022-12-13 13:07:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 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) [2022-12-13 13:07:36,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:36,912 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:36,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 13:07:36,912 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:36,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash 386840209, now seen corresponding path program 1 times [2022-12-13 13:07:36,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:36,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827554000] [2022-12-13 13:07:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:36,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:37,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827554000] [2022-12-13 13:07:37,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827554000] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:37,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:37,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 13:07:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607332348] [2022-12-13 13:07:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:07:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:07:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:07:38,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 408 [2022-12-13 13:07:38,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 292 flow. Second operand has 15 states, 15 states have (on average 182.2) internal successors, (2733), 15 states have internal predecessors, (2733), 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) [2022-12-13 13:07:38,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:38,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 408 [2022-12-13 13:07:38,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:38,799 INFO L130 PetriNetUnfolder]: 460/846 cut-off events. [2022-12-13 13:07:38,799 INFO L131 PetriNetUnfolder]: For 623/623 co-relation queries the response was YES. [2022-12-13 13:07:38,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 846 events. 460/846 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2946 event pairs, 397 based on Foata normal form. 1/795 useless extension candidates. Maximal degree in co-relation 2138. Up to 699 conditions per place. [2022-12-13 13:07:38,801 INFO L137 encePairwiseOnDemand]: 395/408 looper letters, 50 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2022-12-13 13:07:38,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 473 flow [2022-12-13 13:07:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:07:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 13:07:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1860 transitions. [2022-12-13 13:07:38,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2022-12-13 13:07:38,804 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1860 transitions. [2022-12-13 13:07:38,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1860 transitions. [2022-12-13 13:07:38,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:38,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1860 transitions. [2022-12-13 13:07:38,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 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) [2022-12-13 13:07:38,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 408.0) internal successors, (4488), 11 states have internal predecessors, (4488), 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) [2022-12-13 13:07:38,809 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 408.0) internal successors, (4488), 11 states have internal predecessors, (4488), 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) [2022-12-13 13:07:38,809 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 292 flow. Second operand 10 states and 1860 transitions. [2022-12-13 13:07:38,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 473 flow [2022-12-13 13:07:38,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 463 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:07:38,811 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 345 flow [2022-12-13 13:07:38,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2022-12-13 13:07:38,811 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -22 predicate places. [2022-12-13 13:07:38,811 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 345 flow [2022-12-13 13:07:38,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.2) internal successors, (2733), 15 states have internal predecessors, (2733), 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) [2022-12-13 13:07:38,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:38,812 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:38,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 13:07:38,812 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:38,812 INFO L85 PathProgramCache]: Analyzing trace with hash 189590089, now seen corresponding path program 1 times [2022-12-13 13:07:38,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:38,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806431470] [2022-12-13 13:07:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:38,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:39,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:39,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806431470] [2022-12-13 13:07:39,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806431470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:39,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:39,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 13:07:39,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585464946] [2022-12-13 13:07:39,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:39,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:07:39,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:07:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:07:40,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 408 [2022-12-13 13:07:40,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 345 flow. Second operand has 15 states, 15 states have (on average 182.26666666666668) internal successors, (2734), 15 states have internal predecessors, (2734), 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) [2022-12-13 13:07:40,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:40,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 408 [2022-12-13 13:07:40,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:40,538 INFO L130 PetriNetUnfolder]: 448/833 cut-off events. [2022-12-13 13:07:40,538 INFO L131 PetriNetUnfolder]: For 667/667 co-relation queries the response was YES. [2022-12-13 13:07:40,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 833 events. 448/833 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2935 event pairs, 385 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 2127. Up to 682 conditions per place. [2022-12-13 13:07:40,540 INFO L137 encePairwiseOnDemand]: 395/408 looper letters, 50 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2022-12-13 13:07:40,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 77 transitions, 531 flow [2022-12-13 13:07:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:07:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 13:07:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2040 transitions. [2022-12-13 13:07:40,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2022-12-13 13:07:40,543 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2040 transitions. [2022-12-13 13:07:40,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2040 transitions. [2022-12-13 13:07:40,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:40,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2040 transitions. [2022-12-13 13:07:40,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.45454545454547) internal successors, (2040), 11 states have internal predecessors, (2040), 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) [2022-12-13 13:07:40,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 408.0) internal successors, (4896), 12 states have internal predecessors, (4896), 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) [2022-12-13 13:07:40,549 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 408.0) internal successors, (4896), 12 states have internal predecessors, (4896), 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) [2022-12-13 13:07:40,549 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 345 flow. Second operand 11 states and 2040 transitions. [2022-12-13 13:07:40,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 77 transitions, 531 flow [2022-12-13 13:07:40,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 506 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 13:07:40,551 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 387 flow [2022-12-13 13:07:40,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=387, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2022-12-13 13:07:40,552 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -17 predicate places. [2022-12-13 13:07:40,552 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 387 flow [2022-12-13 13:07:40,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.26666666666668) internal successors, (2734), 15 states have internal predecessors, (2734), 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) [2022-12-13 13:07:40,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:40,552 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:40,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 13:07:40,553 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash 694820509, now seen corresponding path program 1 times [2022-12-13 13:07:40,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:40,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592704100] [2022-12-13 13:07:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:40,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:40,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:40,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592704100] [2022-12-13 13:07:40,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592704100] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:40,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:40,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 13:07:40,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337055142] [2022-12-13 13:07:40,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:40,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:07:40,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:07:40,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:07:41,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 408 [2022-12-13 13:07:41,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 387 flow. Second operand has 15 states, 15 states have (on average 182.26666666666668) internal successors, (2734), 15 states have internal predecessors, (2734), 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) [2022-12-13 13:07:41,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:41,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 408 [2022-12-13 13:07:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:41,848 INFO L130 PetriNetUnfolder]: 442/826 cut-off events. [2022-12-13 13:07:41,848 INFO L131 PetriNetUnfolder]: For 690/690 co-relation queries the response was YES. [2022-12-13 13:07:41,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 826 events. 442/826 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2921 event pairs, 379 based on Foata normal form. 1/775 useless extension candidates. Maximal degree in co-relation 2116. Up to 671 conditions per place. [2022-12-13 13:07:41,852 INFO L137 encePairwiseOnDemand]: 394/408 looper letters, 48 selfloop transitions, 22 changer transitions 0/79 dead transitions. [2022-12-13 13:07:41,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 79 transitions, 586 flow [2022-12-13 13:07:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:07:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 13:07:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2400 transitions. [2022-12-13 13:07:41,855 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45248868778280543 [2022-12-13 13:07:41,855 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2400 transitions. [2022-12-13 13:07:41,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2400 transitions. [2022-12-13 13:07:41,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:41,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2400 transitions. [2022-12-13 13:07:41,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 184.6153846153846) internal successors, (2400), 13 states have internal predecessors, (2400), 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) [2022-12-13 13:07:41,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 408.0) internal successors, (5712), 14 states have internal predecessors, (5712), 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) [2022-12-13 13:07:41,861 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 408.0) internal successors, (5712), 14 states have internal predecessors, (5712), 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) [2022-12-13 13:07:41,861 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 387 flow. Second operand 13 states and 2400 transitions. [2022-12-13 13:07:41,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 79 transitions, 586 flow [2022-12-13 13:07:41,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 79 transitions, 557 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 13:07:41,863 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 433 flow [2022-12-13 13:07:41,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=433, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2022-12-13 13:07:41,864 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -11 predicate places. [2022-12-13 13:07:41,864 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 433 flow [2022-12-13 13:07:41,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.26666666666668) internal successors, (2734), 15 states have internal predecessors, (2734), 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) [2022-12-13 13:07:41,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:41,864 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:41,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 13:07:41,864 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1807410159, now seen corresponding path program 1 times [2022-12-13 13:07:41,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:41,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756346051] [2022-12-13 13:07:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:41,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:42,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:42,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756346051] [2022-12-13 13:07:42,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756346051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:42,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:42,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 13:07:42,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653681246] [2022-12-13 13:07:42,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:42,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:07:42,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:42,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:07:42,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:07:43,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 408 [2022-12-13 13:07:43,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 433 flow. Second operand has 15 states, 15 states have (on average 182.26666666666668) internal successors, (2734), 15 states have internal predecessors, (2734), 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) [2022-12-13 13:07:43,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:43,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 408 [2022-12-13 13:07:43,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:43,444 INFO L130 PetriNetUnfolder]: 442/825 cut-off events. [2022-12-13 13:07:43,444 INFO L131 PetriNetUnfolder]: For 718/718 co-relation queries the response was YES. [2022-12-13 13:07:43,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 825 events. 442/825 cut-off events. For 718/718 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2912 event pairs, 379 based on Foata normal form. 1/774 useless extension candidates. Maximal degree in co-relation 2130. Up to 671 conditions per place. [2022-12-13 13:07:43,446 INFO L137 encePairwiseOnDemand]: 395/408 looper letters, 43 selfloop transitions, 23 changer transitions 0/75 dead transitions. [2022-12-13 13:07:43,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 75 transitions, 587 flow [2022-12-13 13:07:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:07:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:07:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2214 transitions. [2022-12-13 13:07:43,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4522058823529412 [2022-12-13 13:07:43,449 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2214 transitions. [2022-12-13 13:07:43,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2214 transitions. [2022-12-13 13:07:43,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:43,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2214 transitions. [2022-12-13 13:07:43,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 184.5) internal successors, (2214), 12 states have internal predecessors, (2214), 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) [2022-12-13 13:07:43,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 408.0) internal successors, (5304), 13 states have internal predecessors, (5304), 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) [2022-12-13 13:07:43,455 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 408.0) internal successors, (5304), 13 states have internal predecessors, (5304), 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) [2022-12-13 13:07:43,455 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 433 flow. Second operand 12 states and 2214 transitions. [2022-12-13 13:07:43,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 75 transitions, 587 flow [2022-12-13 13:07:43,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 535 flow, removed 0 selfloop flow, removed 14 redundant places. [2022-12-13 13:07:43,457 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 415 flow [2022-12-13 13:07:43,457 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=415, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2022-12-13 13:07:43,457 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2022-12-13 13:07:43,457 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 415 flow [2022-12-13 13:07:43,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.26666666666668) internal successors, (2734), 15 states have internal predecessors, (2734), 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) [2022-12-13 13:07:43,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:43,458 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:43,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 13:07:43,458 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:07:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:43,458 INFO L85 PathProgramCache]: Analyzing trace with hash 399150122, now seen corresponding path program 1 times [2022-12-13 13:07:43,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:43,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057371153] [2022-12-13 13:07:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:43,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:07:43,502 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:07:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:07:43,557 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:07:43,557 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:07:43,558 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (72 of 73 remaining) [2022-12-13 13:07:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 73 remaining) [2022-12-13 13:07:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 73 remaining) [2022-12-13 13:07:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 73 remaining) [2022-12-13 13:07:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 73 remaining) [2022-12-13 13:07:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 73 remaining) [2022-12-13 13:07:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 73 remaining) [2022-12-13 13:07:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 73 remaining) [2022-12-13 13:07:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 73 remaining) [2022-12-13 13:07:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (51 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 73 remaining) [2022-12-13 13:07:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (34 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 73 remaining) [2022-12-13 13:07:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 73 remaining) [2022-12-13 13:07:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 73 remaining) [2022-12-13 13:07:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 73 remaining) [2022-12-13 13:07:43,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 13:07:43,564 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:43,568 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 13:07:43,568 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 13:07:43,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 01:07:43 BasicIcfg [2022-12-13 13:07:43,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 13:07:43,614 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 13:07:43,614 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 13:07:43,614 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 13:07:43,614 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:07:13" (3/4) ... [2022-12-13 13:07:43,616 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 13:07:43,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 13:07:43,617 INFO L158 Benchmark]: Toolchain (without parser) took 31044.98ms. Allocated memory was 180.4MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 145.0MB in the beginning and 2.1GB in the end (delta: -1.9GB). Peak memory consumption was 659.9MB. Max. memory is 16.1GB. [2022-12-13 13:07:43,617 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory was 87.5MB in the beginning and 87.4MB in the end (delta: 29.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:07:43,617 INFO L158 Benchmark]: CACSL2BoogieTranslator took 434.17ms. Allocated memory is still 180.4MB. Free memory was 145.0MB in the beginning and 111.6MB in the end (delta: 33.4MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-12-13 13:07:43,617 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.24ms. Allocated memory is still 180.4MB. Free memory was 111.6MB in the beginning and 108.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:07:43,618 INFO L158 Benchmark]: Boogie Preprocessor took 28.55ms. Allocated memory is still 180.4MB. Free memory was 108.7MB in the beginning and 107.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:07:43,618 INFO L158 Benchmark]: RCFGBuilder took 414.51ms. Allocated memory is still 180.4MB. Free memory was 107.4MB in the beginning and 138.7MB in the end (delta: -31.3MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2022-12-13 13:07:43,618 INFO L158 Benchmark]: TraceAbstraction took 30124.79ms. Allocated memory was 180.4MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 138.7MB in the beginning and 2.1GB in the end (delta: -1.9GB). Peak memory consumption was 651.7MB. Max. memory is 16.1GB. [2022-12-13 13:07:43,618 INFO L158 Benchmark]: Witness Printer took 2.72ms. Allocated memory is still 2.8GB. Free memory was 2.1GB in the beginning and 2.1GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:07:43,619 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory was 87.5MB in the beginning and 87.4MB in the end (delta: 29.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 434.17ms. Allocated memory is still 180.4MB. Free memory was 145.0MB in the beginning and 111.6MB in the end (delta: 33.4MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.24ms. Allocated memory is still 180.4MB. Free memory was 111.6MB in the beginning and 108.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.55ms. Allocated memory is still 180.4MB. Free memory was 108.7MB in the beginning and 107.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 414.51ms. Allocated memory is still 180.4MB. Free memory was 107.4MB in the beginning and 138.7MB in the end (delta: -31.3MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. * TraceAbstraction took 30124.79ms. Allocated memory was 180.4MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 138.7MB in the beginning and 2.1GB in the end (delta: -1.9GB). Peak memory consumption was 651.7MB. Max. memory is 16.1GB. * Witness Printer took 2.72ms. Allocated memory is still 2.8GB. Free memory was 2.1GB in the beginning and 2.1GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 185 PlacesBefore, 101 PlacesAfterwards, 173 TransitionsBefore, 87 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 6 FixpointIterations, 56 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 149 TotalNumberOfCompositions, 7349 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4509, independent: 4217, independent conditional: 0, independent unconditional: 4217, dependent: 292, dependent conditional: 0, dependent unconditional: 292, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1264, independent: 1206, independent conditional: 0, independent unconditional: 1206, dependent: 58, dependent conditional: 0, dependent unconditional: 58, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4509, independent: 3011, independent conditional: 0, independent unconditional: 3011, dependent: 234, dependent conditional: 0, dependent unconditional: 234, unknown: 1264, unknown conditional: 0, unknown unconditional: 1264] , Statistics on independence cache: Total cache size (in pairs): 144, Positive cache size: 119, Positive conditional cache size: 0, Positive unconditional cache size: 119, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1159]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1159. Possible FailurePath: [L1124] 0 char *v; [L1161] 0 pthread_t t; [L1162] FCALL, FORK 0 pthread_create(&t, 0, thread0, 0) VAL [arg={0:0}, pthread_create(&t, 0, thread0, 0)=14, t={9:0}, v={0:0}] [L1146] 1 pthread_t t1, t2, t3, t4, t5; [L1147] FCALL, FORK 1 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=15, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={0:0}] [L1148] 1 \read(t1) VAL [\read(t1)=15, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={0:0}] [L1127] 2 v = malloc(sizeof(char)) [L1128] 2 return 0; [L1163] 0 \read(t) VAL [\read(t)=14, \read(t1)=15, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={9:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1148] FCALL, JOIN 2 pthread_join(t1, 0) VAL [\read(t1)=15, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1149] FCALL, FORK 1 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=16, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1133] 3 v[0] = 'X' [L1135] 3 return 0; [L1150] FCALL, FORK 1 pthread_create(&t3, 0, thread3, 0) VAL [\result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=17, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1140] 4 v[0] = 'Y' [L1142] 4 return 0; [L1151] FCALL, FORK 1 pthread_create(&t4, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=18, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1133] 5 v[0] = 'X' [L1135] 5 return 0; [L1152] FCALL, FORK 1 pthread_create(&t5, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=19, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1153] 1 \read(t2) VAL [\read(t2)=16, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1133] 6 v[0] = 'X' [L1135] 6 return 0; [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [\read(t2)=16, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1154] 1 \read(t3) VAL [\read(t3)=17, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [\read(t3)=17, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1155] 1 \read(t4) VAL [\read(t4)=18, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [\read(t4)=18, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1156] 1 \read(t5) VAL [\read(t5)=19, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [\read(t5)=19, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1163] FCALL, JOIN 1 pthread_join(t, 0) VAL [\read(t)=14, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={9:0}, v={6:0}] [L1164] EXPR 0 v[0] [L1164] EXPR 0 v[0] == 'X' || v[0] == 'Y' [L1164] CALL 0 __VERIFIER_assert(v[0] == 'X' || v[0] == 'Y') [L1123] COND FALSE 0 !(!expression) [L1164] RET 0 __VERIFIER_assert(v[0] == 'X' || v[0] == 'Y') [L1165] 0 return 0; [L1165] 0 return 0; - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1152]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1150]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1147]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1149]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1151]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1162]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1149]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1151]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1147]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1150]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1152]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 11 procedures, 294 locations, 73 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 29.9s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 22.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9694 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6892 mSDsluCounter, 1748 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1530 mSDsCounter, 645 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14160 IncrementalHoareTripleChecker+Invalid, 14805 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 645 mSolverCounterUnsat, 218 mSDtfsCounter, 14160 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=433occurred in iteration=19, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 338 ConstructedInterpolants, 0 QuantifiedInterpolants, 5559 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 13:07:43,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/singleton_with-uninit-problems.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8 --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 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 --- 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-2329fc7 [2022-12-13 13:07:45,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:07:45,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:07:45,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:07:45,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:07:45,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:07:45,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:07:45,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:07:45,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:07:45,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:07:45,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:07:45,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:07:45,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:07:45,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:07:45,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:07:45,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:07:45,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:07:45,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:07:45,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:07:45,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:07:45,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:07:45,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:07:45,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:07:45,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:07:45,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:07:45,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:07:45,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:07:45,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:07:45,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:07:45,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:07:45,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:07:45,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:07:45,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:07:45,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:07:45,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:07:45,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:07:45,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:07:45,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:07:45,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:07:45,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:07:45,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:07:45,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 13:07:45,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:07:45,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:07:45,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:07:45,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:07:45,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:07:45,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:07:45,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:07:45,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:07:45,325 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:07:45,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:07:45,325 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:07:45,325 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:07:45,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:07:45,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:07:45,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:07:45,325 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:07:45,326 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:07:45,326 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:07:45,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:07:45,326 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:07:45,326 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 13:07:45,326 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 13:07:45,326 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:07:45,326 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:07:45,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:07:45,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:07:45,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:07:45,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:07:45,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:07:45,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:07:45,327 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 13:07:45,327 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 13:07:45,328 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:07:45,328 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:07:45,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:07:45,328 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 13:07:45,328 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:07:45,328 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_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 [2022-12-13 13:07:45,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:07:45,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:07:45,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:07:45,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:07:45,565 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:07:45,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/singleton_with-uninit-problems.i [2022-12-13 13:07:48,052 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:07:48,284 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:07:48,284 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/sv-benchmarks/c/pthread/singleton_with-uninit-problems.i [2022-12-13 13:07:48,296 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/data/b773801ab/cb311c83d4844bd6a2881ae57746136d/FLAG67a838880 [2022-12-13 13:07:48,310 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/data/b773801ab/cb311c83d4844bd6a2881ae57746136d [2022-12-13 13:07:48,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:07:48,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:07:48,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:07:48,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:07:48,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:07:48,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@acca9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48, skipping insertion in model container [2022-12-13 13:07:48,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:07:48,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:07:48,547 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:07:48,731 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_312ef1cb-b048-46f2-854b-e705b8beddc3/sv-benchmarks/c/pthread/singleton_with-uninit-problems.i[55568,55581] [2022-12-13 13:07:48,736 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:07:48,737 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:07:48,738 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:07:48,739 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:07:48,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:07:48,758 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:07:48,770 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:07:48,785 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_312ef1cb-b048-46f2-854b-e705b8beddc3/sv-benchmarks/c/pthread/singleton_with-uninit-problems.i[55568,55581] [2022-12-13 13:07:48,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:07:48,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:07:48,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:07:48,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:07:48,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:07:48,864 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:07:48,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48 WrapperNode [2022-12-13 13:07:48,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:07:48,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:07:48,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:07:48,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:07:48,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,909 INFO L138 Inliner]: procedures = 328, calls = 53, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-12-13 13:07:48,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:07:48,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:07:48,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:07:48,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:07:48,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,933 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:07:48,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:07:48,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:07:48,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:07:48,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (1/1) ... [2022-12-13 13:07:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:07:48,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:07:48,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:07:48,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:07:48,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-12-13 13:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 13:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 13:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-12-13 13:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 13:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 13:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 13:07:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-12-13 13:07:48,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-12-13 13:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 13:07:49,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 13:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 13:07:49,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 13:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 13:07:49,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 13:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:07:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:07:49,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:07:49,002 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:07:49,117 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:07:49,119 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:07:49,470 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:07:49,476 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:07:49,476 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 13:07:49,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:07:49 BoogieIcfgContainer [2022-12-13 13:07:49,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:07:49,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:07:49,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:07:49,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:07:49,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:07:48" (1/3) ... [2022-12-13 13:07:49,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b04dc15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:07:49, skipping insertion in model container [2022-12-13 13:07:49,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:48" (2/3) ... [2022-12-13 13:07:49,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b04dc15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:07:49, skipping insertion in model container [2022-12-13 13:07:49,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:07:49" (3/3) ... [2022-12-13 13:07:49,484 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton_with-uninit-problems.i [2022-12-13 13:07:49,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:07:49,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-13 13:07:49,497 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:07:49,601 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2022-12-13 13:07:49,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 258 transitions, 623 flow [2022-12-13 13:07:49,680 INFO L130 PetriNetUnfolder]: 7/179 cut-off events. [2022-12-13 13:07:49,680 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:07:49,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 179 events. 7/179 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 174 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 149. Up to 3 conditions per place. [2022-12-13 13:07:49,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 258 transitions, 623 flow [2022-12-13 13:07:49,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 174 transitions, 399 flow [2022-12-13 13:07:49,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:07:49,699 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 174 transitions, 399 flow [2022-12-13 13:07:49,701 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 174 transitions, 399 flow [2022-12-13 13:07:49,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 174 transitions, 399 flow [2022-12-13 13:07:49,726 INFO L130 PetriNetUnfolder]: 7/174 cut-off events. [2022-12-13 13:07:49,726 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:07:49,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 174 events. 7/174 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 175 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 144. Up to 3 conditions per place. [2022-12-13 13:07:49,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2022-12-13 13:08:00,003 INFO L134 LiptonReduction]: Checked pairs total: 7301 [2022-12-13 13:08:00,003 INFO L136 LiptonReduction]: Total number of compositions: 150 [2022-12-13 13:08:00,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:08:00,017 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;@123266d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:08:00,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2022-12-13 13:08:00,019 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 13:08:00,019 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:08:00,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:00,019 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 13:08:00,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash 668, now seen corresponding path program 1 times [2022-12-13 13:08:00,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:00,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932179976] [2022-12-13 13:08:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:00,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:00,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:00,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:00,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 13:08:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 13:08:00,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:00,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:00,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:00,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932179976] [2022-12-13 13:08:00,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932179976] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:00,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:00,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 13:08:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887858684] [2022-12-13 13:08:00,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:00,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:08:00,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:00,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:08:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:08:00,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 410 [2022-12-13 13:08:00,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 225 flow. Second operand has 2 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 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) [2022-12-13 13:08:00,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:00,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 410 [2022-12-13 13:08:00,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:02,467 INFO L130 PetriNetUnfolder]: 19442/26684 cut-off events. [2022-12-13 13:08:02,467 INFO L131 PetriNetUnfolder]: For 561/561 co-relation queries the response was YES. [2022-12-13 13:08:02,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53387 conditions, 26684 events. 19442/26684 cut-off events. For 561/561 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145291 event pairs, 19098 based on Foata normal form. 0/9507 useless extension candidates. Maximal degree in co-relation 53362. Up to 25317 conditions per place. [2022-12-13 13:08:02,713 INFO L137 encePairwiseOnDemand]: 406/410 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-12-13 13:08:02,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2022-12-13 13:08:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:08:02,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 13:08:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 523 transitions. [2022-12-13 13:08:02,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6378048780487805 [2022-12-13 13:08:02,725 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 523 transitions. [2022-12-13 13:08:02,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 523 transitions. [2022-12-13 13:08:02,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:02,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 523 transitions. [2022-12-13 13:08:02,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 261.5) internal successors, (523), 2 states have internal predecessors, (523), 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) [2022-12-13 13:08:02,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 410.0) internal successors, (1230), 3 states have internal predecessors, (1230), 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) [2022-12-13 13:08:02,736 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 410.0) internal successors, (1230), 3 states have internal predecessors, (1230), 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) [2022-12-13 13:08:02,737 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 225 flow. Second operand 2 states and 523 transitions. [2022-12-13 13:08:02,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2022-12-13 13:08:02,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 13:08:02,765 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2022-12-13 13:08:02,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2022-12-13 13:08:02,769 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2022-12-13 13:08:02,769 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2022-12-13 13:08:02,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 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) [2022-12-13 13:08:02,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:02,770 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:08:02,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:08:02,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:02,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:02,971 INFO L85 PathProgramCache]: Analyzing trace with hash 655850, now seen corresponding path program 1 times [2022-12-13 13:08:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208781386] [2022-12-13 13:08:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:02,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:02,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:02,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:02,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 13:08:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:03,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:08:03,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:03,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:08:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:03,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:03,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:03,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208781386] [2022-12-13 13:08:03,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208781386] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:03,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:03,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:08:03,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541513327] [2022-12-13 13:08:03,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:03,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:03,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:03,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:03,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:03,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 410 [2022-12-13 13:08:03,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 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) [2022-12-13 13:08:03,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:03,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 410 [2022-12-13 13:08:03,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:05,106 INFO L130 PetriNetUnfolder]: 19429/26658 cut-off events. [2022-12-13 13:08:05,106 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-12-13 13:08:05,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52298 conditions, 26658 events. 19429/26658 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145117 event pairs, 16159 based on Foata normal form. 0/9495 useless extension candidates. Maximal degree in co-relation 52295. Up to 25245 conditions per place. [2022-12-13 13:08:05,201 INFO L137 encePairwiseOnDemand]: 407/410 looper letters, 68 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2022-12-13 13:08:05,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 333 flow [2022-12-13 13:08:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:08:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-12-13 13:08:05,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5967479674796748 [2022-12-13 13:08:05,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-12-13 13:08:05,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-12-13 13:08:05,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:05,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-12-13 13:08:05,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 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) [2022-12-13 13:08:05,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:05,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:05,211 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 734 transitions. [2022-12-13 13:08:05,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 333 flow [2022-12-13 13:08:05,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:08:05,214 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 191 flow [2022-12-13 13:08:05,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2022-12-13 13:08:05,215 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2022-12-13 13:08:05,215 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 191 flow [2022-12-13 13:08:05,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 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) [2022-12-13 13:08:05,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:05,216 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:08:05,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 13:08:05,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:05,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash 655849, now seen corresponding path program 1 times [2022-12-13 13:08:05,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:05,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887499656] [2022-12-13 13:08:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:05,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:05,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:05,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:05,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 13:08:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:08:05,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:05,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:05,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:05,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:05,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887499656] [2022-12-13 13:08:05,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887499656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:05,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:05,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:08:05,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556414651] [2022-12-13 13:08:05,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:05,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:05,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:05,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:05,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:05,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 410 [2022-12-13 13:08:05,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 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) [2022-12-13 13:08:05,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:05,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 410 [2022-12-13 13:08:05,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:07,077 INFO L130 PetriNetUnfolder]: 14208/19642 cut-off events. [2022-12-13 13:08:07,077 INFO L131 PetriNetUnfolder]: For 1527/1527 co-relation queries the response was YES. [2022-12-13 13:08:07,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40002 conditions, 19642 events. 14208/19642 cut-off events. For 1527/1527 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104194 event pairs, 13940 based on Foata normal form. 0/8955 useless extension candidates. Maximal degree in co-relation 39997. Up to 18583 conditions per place. [2022-12-13 13:08:07,147 INFO L137 encePairwiseOnDemand]: 401/410 looper letters, 69 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2022-12-13 13:08:07,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 370 flow [2022-12-13 13:08:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:08:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 705 transitions. [2022-12-13 13:08:07,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2022-12-13 13:08:07,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 705 transitions. [2022-12-13 13:08:07,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 705 transitions. [2022-12-13 13:08:07,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:07,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 705 transitions. [2022-12-13 13:08:07,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 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) [2022-12-13 13:08:07,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:07,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:07,155 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 191 flow. Second operand 3 states and 705 transitions. [2022-12-13 13:08:07,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 370 flow [2022-12-13 13:08:07,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:08:07,157 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 245 flow [2022-12-13 13:08:07,158 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2022-12-13 13:08:07,158 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -10 predicate places. [2022-12-13 13:08:07,159 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 245 flow [2022-12-13 13:08:07,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 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) [2022-12-13 13:08:07,159 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:07,159 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:07,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 13:08:07,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:07,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:07,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:07,361 INFO L85 PathProgramCache]: Analyzing trace with hash 33689616, now seen corresponding path program 1 times [2022-12-13 13:08:07,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:07,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423896626] [2022-12-13 13:08:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:07,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:07,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:07,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:07,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 13:08:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:07,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 13:08:07,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:07,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:08:07,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:07,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:07,518 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:07,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:07,625 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:07,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:07,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:07,754 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:08:07,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-13 13:08:07,787 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-13 13:08:07,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 13:08:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:07,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:07,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:07,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423896626] [2022-12-13 13:08:07,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423896626] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:07,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:07,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:08:07,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140003576] [2022-12-13 13:08:07,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:07,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:08:07,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:07,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:08:07,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:08:09,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 410 [2022-12-13 13:08:09,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 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) [2022-12-13 13:08:09,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:09,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 410 [2022-12-13 13:08:09,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:10,881 INFO L130 PetriNetUnfolder]: 14199/19619 cut-off events. [2022-12-13 13:08:10,881 INFO L131 PetriNetUnfolder]: For 2991/2991 co-relation queries the response was YES. [2022-12-13 13:08:10,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41458 conditions, 19619 events. 14199/19619 cut-off events. For 2991/2991 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104107 event pairs, 12469 based on Foata normal form. 0/8953 useless extension candidates. Maximal degree in co-relation 41452. Up to 18533 conditions per place. [2022-12-13 13:08:10,956 INFO L137 encePairwiseOnDemand]: 401/410 looper letters, 71 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2022-12-13 13:08:10,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 407 flow [2022-12-13 13:08:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:08:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:08:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1066 transitions. [2022-12-13 13:08:10,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.52 [2022-12-13 13:08:10,960 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1066 transitions. [2022-12-13 13:08:10,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1066 transitions. [2022-12-13 13:08:10,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:10,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1066 transitions. [2022-12-13 13:08:10,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.2) internal successors, (1066), 5 states have internal predecessors, (1066), 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) [2022-12-13 13:08:10,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:10,967 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:10,967 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 245 flow. Second operand 5 states and 1066 transitions. [2022-12-13 13:08:10,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 407 flow [2022-12-13 13:08:10,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:08:10,970 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 231 flow [2022-12-13 13:08:10,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2022-12-13 13:08:10,971 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2022-12-13 13:08:10,972 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 231 flow [2022-12-13 13:08:10,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 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) [2022-12-13 13:08:10,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:10,973 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:10,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 13:08:11,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:11,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:11,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:11,176 INFO L85 PathProgramCache]: Analyzing trace with hash 285428803, now seen corresponding path program 1 times [2022-12-13 13:08:11,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:11,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223424003] [2022-12-13 13:08:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:11,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:11,182 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:11,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 13:08:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:11,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 13:08:11,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:11,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:08:11,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:11,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:11,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:11,422 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:11,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:11,534 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:11,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:11,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:11,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:11,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:11,624 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:11,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:11,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:11,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:11,684 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-13 13:08:11,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 13:08:11,717 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 13:08:11,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:11,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:11,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:11,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:11,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223424003] [2022-12-13 13:08:11,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223424003] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:11,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:11,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:08:11,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010728821] [2022-12-13 13:08:11,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:11,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:08:11,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:08:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:08:13,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 410 [2022-12-13 13:08:13,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 197.83333333333334) internal successors, (1187), 6 states have internal predecessors, (1187), 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) [2022-12-13 13:08:13,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:13,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 410 [2022-12-13 13:08:13,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:14,607 INFO L130 PetriNetUnfolder]: 8986/12612 cut-off events. [2022-12-13 13:08:14,607 INFO L131 PetriNetUnfolder]: For 2966/2966 co-relation queries the response was YES. [2022-12-13 13:08:14,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26234 conditions, 12612 events. 8986/12612 cut-off events. For 2966/2966 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 64679 event pairs, 8809 based on Foata normal form. 1456/6951 useless extension candidates. Maximal degree in co-relation 26228. Up to 11898 conditions per place. [2022-12-13 13:08:14,662 INFO L137 encePairwiseOnDemand]: 401/410 looper letters, 65 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2022-12-13 13:08:14,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 384 flow [2022-12-13 13:08:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:08:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:08:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1056 transitions. [2022-12-13 13:08:14,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5151219512195122 [2022-12-13 13:08:14,666 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1056 transitions. [2022-12-13 13:08:14,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1056 transitions. [2022-12-13 13:08:14,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:14,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1056 transitions. [2022-12-13 13:08:14,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 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) [2022-12-13 13:08:14,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:14,672 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:14,672 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 231 flow. Second operand 5 states and 1056 transitions. [2022-12-13 13:08:14,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 384 flow [2022-12-13 13:08:14,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 88 transitions, 372 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 13:08:14,675 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 233 flow [2022-12-13 13:08:14,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2022-12-13 13:08:14,675 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -14 predicate places. [2022-12-13 13:08:14,675 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 233 flow [2022-12-13 13:08:14,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.83333333333334) internal successors, (1187), 6 states have internal predecessors, (1187), 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) [2022-12-13 13:08:14,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:14,676 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:14,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 13:08:14,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:14,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -826224672, now seen corresponding path program 1 times [2022-12-13 13:08:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:14,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145498067] [2022-12-13 13:08:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:14,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:14,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:14,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:14,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 13:08:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:15,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:08:15,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:15,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:15,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:08:15,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:15,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:15,083 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:15,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:15,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:15,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:15,135 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:15,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:15,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:15,174 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:08:15,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 13:08:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:15,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:15,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:15,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:15,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145498067] [2022-12-13 13:08:15,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145498067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:15,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:15,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:08:15,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929730502] [2022-12-13 13:08:15,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:15,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:08:15,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:15,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:08:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:08:16,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 410 [2022-12-13 13:08:16,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 207.2) internal successors, (1036), 5 states have internal predecessors, (1036), 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) [2022-12-13 13:08:16,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:16,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 410 [2022-12-13 13:08:16,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:17,051 INFO L130 PetriNetUnfolder]: 5398/7996 cut-off events. [2022-12-13 13:08:17,051 INFO L131 PetriNetUnfolder]: For 997/997 co-relation queries the response was YES. [2022-12-13 13:08:17,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16479 conditions, 7996 events. 5398/7996 cut-off events. For 997/997 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 41499 event pairs, 4273 based on Foata normal form. 0/3960 useless extension candidates. Maximal degree in co-relation 16474. Up to 7257 conditions per place. [2022-12-13 13:08:17,076 INFO L137 encePairwiseOnDemand]: 402/410 looper letters, 64 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2022-12-13 13:08:17,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 383 flow [2022-12-13 13:08:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:08:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:08:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1092 transitions. [2022-12-13 13:08:17,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5326829268292683 [2022-12-13 13:08:17,079 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1092 transitions. [2022-12-13 13:08:17,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1092 transitions. [2022-12-13 13:08:17,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:17,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1092 transitions. [2022-12-13 13:08:17,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.4) internal successors, (1092), 5 states have internal predecessors, (1092), 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) [2022-12-13 13:08:17,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:17,082 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:17,082 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 233 flow. Second operand 5 states and 1092 transitions. [2022-12-13 13:08:17,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 383 flow [2022-12-13 13:08:17,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 85 transitions, 378 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:08:17,085 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 230 flow [2022-12-13 13:08:17,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2022-12-13 13:08:17,085 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2022-12-13 13:08:17,085 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 230 flow [2022-12-13 13:08:17,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.2) internal successors, (1036), 5 states have internal predecessors, (1036), 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) [2022-12-13 13:08:17,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:17,086 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:17,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 13:08:17,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:17,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash 572999450, now seen corresponding path program 1 times [2022-12-13 13:08:17,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:17,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742921813] [2022-12-13 13:08:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:17,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:17,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:17,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 13:08:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:08:17,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:17,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:08:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:17,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:17,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:17,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742921813] [2022-12-13 13:08:17,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742921813] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:17,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:17,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:08:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600486332] [2022-12-13 13:08:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:17,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:17,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:17,634 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 410 [2022-12-13 13:08:17,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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) [2022-12-13 13:08:17,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:17,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 410 [2022-12-13 13:08:17,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:17,905 INFO L130 PetriNetUnfolder]: 1847/2933 cut-off events. [2022-12-13 13:08:17,906 INFO L131 PetriNetUnfolder]: For 416/416 co-relation queries the response was YES. [2022-12-13 13:08:17,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 2933 events. 1847/2933 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13469 event pairs, 1396 based on Foata normal form. 0/1765 useless extension candidates. Maximal degree in co-relation 6054. Up to 2586 conditions per place. [2022-12-13 13:08:17,912 INFO L137 encePairwiseOnDemand]: 404/410 looper letters, 60 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2022-12-13 13:08:17,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 77 transitions, 348 flow [2022-12-13 13:08:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:08:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2022-12-13 13:08:17,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2022-12-13 13:08:17,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2022-12-13 13:08:17,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2022-12-13 13:08:17,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:17,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2022-12-13 13:08:17,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 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) [2022-12-13 13:08:17,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:17,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:17,917 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 230 flow. Second operand 3 states and 700 transitions. [2022-12-13 13:08:17,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 77 transitions, 348 flow [2022-12-13 13:08:17,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 338 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 13:08:17,919 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 212 flow [2022-12-13 13:08:17,919 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2022-12-13 13:08:17,919 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -23 predicate places. [2022-12-13 13:08:17,919 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 212 flow [2022-12-13 13:08:17,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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) [2022-12-13 13:08:17,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:17,920 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:17,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 13:08:18,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:18,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:18,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash 572999449, now seen corresponding path program 1 times [2022-12-13 13:08:18,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:18,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003736125] [2022-12-13 13:08:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:18,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:18,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:18,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 13:08:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:18,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:08:18,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:18,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:18,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:18,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003736125] [2022-12-13 13:08:18,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003736125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:18,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:18,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:08:18,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401595191] [2022-12-13 13:08:18,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:18,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:18,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:18,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 410 [2022-12-13 13:08:18,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 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) [2022-12-13 13:08:18,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:18,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 410 [2022-12-13 13:08:18,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:18,544 INFO L130 PetriNetUnfolder]: 423/796 cut-off events. [2022-12-13 13:08:18,544 INFO L131 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2022-12-13 13:08:18,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670 conditions, 796 events. 423/796 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2843 event pairs, 277 based on Foata normal form. 0/649 useless extension candidates. Maximal degree in co-relation 1665. Up to 625 conditions per place. [2022-12-13 13:08:18,546 INFO L137 encePairwiseOnDemand]: 403/410 looper letters, 53 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2022-12-13 13:08:18,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 322 flow [2022-12-13 13:08:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:08:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2022-12-13 13:08:18,547 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2022-12-13 13:08:18,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2022-12-13 13:08:18,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2022-12-13 13:08:18,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:18,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2022-12-13 13:08:18,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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) [2022-12-13 13:08:18,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:18,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:18,550 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 212 flow. Second operand 3 states and 660 transitions. [2022-12-13 13:08:18,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 322 flow [2022-12-13 13:08:18,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:08:18,551 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 209 flow [2022-12-13 13:08:18,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-12-13 13:08:18,551 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -26 predicate places. [2022-12-13 13:08:18,552 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 209 flow [2022-12-13 13:08:18,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 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) [2022-12-13 13:08:18,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:18,552 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:18,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-13 13:08:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:18,754 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:18,755 INFO L85 PathProgramCache]: Analyzing trace with hash 572999500, now seen corresponding path program 1 times [2022-12-13 13:08:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:18,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234682598] [2022-12-13 13:08:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:18,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:18,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:18,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:18,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 13:08:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:18,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:08:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:18,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:18,873 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:18,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:18,892 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:18,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:18,907 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 13:08:18,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:18,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:18,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:18,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234682598] [2022-12-13 13:08:18,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234682598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:18,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:18,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:08:18,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343414740] [2022-12-13 13:08:18,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:18,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:18,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:19,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 410 [2022-12-13 13:08:19,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 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) [2022-12-13 13:08:19,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:19,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 410 [2022-12-13 13:08:19,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:19,322 INFO L130 PetriNetUnfolder]: 452/807 cut-off events. [2022-12-13 13:08:19,322 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2022-12-13 13:08:19,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1739 conditions, 807 events. 452/807 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2678 event pairs, 297 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1734. Up to 678 conditions per place. [2022-12-13 13:08:19,325 INFO L137 encePairwiseOnDemand]: 406/410 looper letters, 54 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-12-13 13:08:19,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 321 flow [2022-12-13 13:08:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:08:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-12-13 13:08:19,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5544715447154471 [2022-12-13 13:08:19,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-12-13 13:08:19,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-12-13 13:08:19,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:19,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-12-13 13:08:19,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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) [2022-12-13 13:08:19,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:19,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:19,330 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 209 flow. Second operand 3 states and 682 transitions. [2022-12-13 13:08:19,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 321 flow [2022-12-13 13:08:19,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:08:19,331 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 203 flow [2022-12-13 13:08:19,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-12-13 13:08:19,332 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -28 predicate places. [2022-12-13 13:08:19,332 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 203 flow [2022-12-13 13:08:19,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 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) [2022-12-13 13:08:19,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:19,332 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:19,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 13:08:19,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:19,533 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash 567053039, now seen corresponding path program 1 times [2022-12-13 13:08:19,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:19,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556786862] [2022-12-13 13:08:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:19,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:19,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:19,536 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:19,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 13:08:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:19,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 13:08:19,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:19,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:08:19,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:19,751 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:19,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:19,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:19,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:19,786 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:08:19,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 13:08:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:19,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:19,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:19,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:19,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556786862] [2022-12-13 13:08:19,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556786862] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:19,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:19,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:08:19,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894503534] [2022-12-13 13:08:19,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:19,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:08:19,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:19,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:08:19,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:08:20,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 410 [2022-12-13 13:08:20,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 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) [2022-12-13 13:08:20,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:20,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 410 [2022-12-13 13:08:20,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:21,297 INFO L130 PetriNetUnfolder]: 448/783 cut-off events. [2022-12-13 13:08:21,297 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2022-12-13 13:08:21,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1701 conditions, 783 events. 448/783 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2492 event pairs, 291 based on Foata normal form. 0/676 useless extension candidates. Maximal degree in co-relation 1696. Up to 655 conditions per place. [2022-12-13 13:08:21,299 INFO L137 encePairwiseOnDemand]: 404/410 looper letters, 54 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2022-12-13 13:08:21,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 337 flow [2022-12-13 13:08:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:08:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:08:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1080 transitions. [2022-12-13 13:08:21,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2022-12-13 13:08:21,301 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1080 transitions. [2022-12-13 13:08:21,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1080 transitions. [2022-12-13 13:08:21,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:21,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1080 transitions. [2022-12-13 13:08:21,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 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) [2022-12-13 13:08:21,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:21,304 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:21,304 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 203 flow. Second operand 5 states and 1080 transitions. [2022-12-13 13:08:21,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 337 flow [2022-12-13 13:08:21,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:08:21,306 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 205 flow [2022-12-13 13:08:21,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2022-12-13 13:08:21,306 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -28 predicate places. [2022-12-13 13:08:21,306 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 205 flow [2022-12-13 13:08:21,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 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) [2022-12-13 13:08:21,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:21,306 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:21,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 13:08:21,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:21,508 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash 896721639, now seen corresponding path program 1 times [2022-12-13 13:08:21,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:21,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912159773] [2022-12-13 13:08:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:21,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:21,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:21,514 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:21,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 13:08:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:21,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:08:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:21,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:21,683 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:21,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:21,698 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 13:08:21,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:21,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:21,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:21,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912159773] [2022-12-13 13:08:21,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912159773] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:21,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:21,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:08:21,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586307344] [2022-12-13 13:08:21,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:21,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:21,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:21,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:21,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:21,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 410 [2022-12-13 13:08:21,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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) [2022-12-13 13:08:21,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:21,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 410 [2022-12-13 13:08:21,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:22,042 INFO L130 PetriNetUnfolder]: 416/734 cut-off events. [2022-12-13 13:08:22,042 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2022-12-13 13:08:22,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 734 events. 416/734 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2324 event pairs, 271 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 1598. Up to 622 conditions per place. [2022-12-13 13:08:22,044 INFO L137 encePairwiseOnDemand]: 406/410 looper letters, 52 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-12-13 13:08:22,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 313 flow [2022-12-13 13:08:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:08:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2022-12-13 13:08:22,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2022-12-13 13:08:22,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2022-12-13 13:08:22,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2022-12-13 13:08:22,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:22,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2022-12-13 13:08:22,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 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) [2022-12-13 13:08:22,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:22,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:22,048 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 205 flow. Second operand 3 states and 680 transitions. [2022-12-13 13:08:22,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 313 flow [2022-12-13 13:08:22,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 303 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 13:08:22,049 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 195 flow [2022-12-13 13:08:22,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-12-13 13:08:22,050 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2022-12-13 13:08:22,050 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 195 flow [2022-12-13 13:08:22,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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) [2022-12-13 13:08:22,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:22,050 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:22,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 13:08:22,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:22,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash -522859124, now seen corresponding path program 1 times [2022-12-13 13:08:22,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:22,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079321703] [2022-12-13 13:08:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:22,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:22,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:22,257 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:22,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 13:08:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:08:22,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:22,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:08:22,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:22,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:22,399 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:08:22,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 13:08:22,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:22,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:22,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:22,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079321703] [2022-12-13 13:08:22,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079321703] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:22,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:22,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:08:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103074209] [2022-12-13 13:08:22,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:22,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:08:22,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:22,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:08:22,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:08:23,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 410 [2022-12-13 13:08:23,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2022-12-13 13:08:23,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:23,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 410 [2022-12-13 13:08:23,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:23,772 INFO L130 PetriNetUnfolder]: 404/706 cut-off events. [2022-12-13 13:08:23,772 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-12-13 13:08:23,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544 conditions, 706 events. 404/706 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2187 event pairs, 260 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 1539. Up to 587 conditions per place. [2022-12-13 13:08:23,774 INFO L137 encePairwiseOnDemand]: 404/410 looper letters, 52 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2022-12-13 13:08:23,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 325 flow [2022-12-13 13:08:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:08:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:08:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1078 transitions. [2022-12-13 13:08:23,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5258536585365854 [2022-12-13 13:08:23,776 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1078 transitions. [2022-12-13 13:08:23,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1078 transitions. [2022-12-13 13:08:23,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:23,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1078 transitions. [2022-12-13 13:08:23,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 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) [2022-12-13 13:08:23,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:23,779 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 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) [2022-12-13 13:08:23,779 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 195 flow. Second operand 5 states and 1078 transitions. [2022-12-13 13:08:23,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 325 flow [2022-12-13 13:08:23,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:08:23,780 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 197 flow [2022-12-13 13:08:23,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=197, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2022-12-13 13:08:23,781 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2022-12-13 13:08:23,781 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 197 flow [2022-12-13 13:08:23,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2022-12-13 13:08:23,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:23,781 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:23,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 13:08:23,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:23,983 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:23,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1538917246, now seen corresponding path program 1 times [2022-12-13 13:08:23,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:23,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917800315] [2022-12-13 13:08:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:23,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:23,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:23,988 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:23,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 13:08:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:24,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:08:24,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:24,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:24,140 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 13:08:24,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:24,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:24,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:24,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917800315] [2022-12-13 13:08:24,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917800315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:24,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:24,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:08:24,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184994294] [2022-12-13 13:08:24,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:24,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:24,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:24,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 410 [2022-12-13 13:08:24,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 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) [2022-12-13 13:08:24,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:24,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 410 [2022-12-13 13:08:24,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:24,468 INFO L130 PetriNetUnfolder]: 363/644 cut-off events. [2022-12-13 13:08:24,468 INFO L131 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2022-12-13 13:08:24,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 644 events. 363/644 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1933 event pairs, 233 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 1410. Up to 539 conditions per place. [2022-12-13 13:08:24,470 INFO L137 encePairwiseOnDemand]: 406/410 looper letters, 49 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2022-12-13 13:08:24,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 299 flow [2022-12-13 13:08:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:08:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-12-13 13:08:24,471 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5504065040650407 [2022-12-13 13:08:24,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-12-13 13:08:24,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-12-13 13:08:24,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:24,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-12-13 13:08:24,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 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) [2022-12-13 13:08:24,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:24,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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) [2022-12-13 13:08:24,474 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 197 flow. Second operand 3 states and 677 transitions. [2022-12-13 13:08:24,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 299 flow [2022-12-13 13:08:24,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 289 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 13:08:24,475 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 187 flow [2022-12-13 13:08:24,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2022-12-13 13:08:24,476 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -36 predicate places. [2022-12-13 13:08:24,476 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 187 flow [2022-12-13 13:08:24,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 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) [2022-12-13 13:08:24,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:24,476 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:24,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 13:08:24,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:24,677 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash 43568679, now seen corresponding path program 1 times [2022-12-13 13:08:24,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:24,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932359716] [2022-12-13 13:08:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:24,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:24,682 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:24,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 13:08:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:24,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:08:24,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:24,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:08:24,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:24,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:24,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:08:24,837 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:08:24,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 13:08:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:24,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:24,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:24,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932359716] [2022-12-13 13:08:24,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932359716] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:24,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:24,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:08:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620141150] [2022-12-13 13:08:24,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:24,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:08:24,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:08:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:08:25,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 410 [2022-12-13 13:08:25,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 187 flow. Second operand has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2022-12-13 13:08:25,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:25,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 410 [2022-12-13 13:08:25,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:25,441 INFO L130 PetriNetUnfolder]: 331/592 cut-off events. [2022-12-13 13:08:25,441 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-12-13 13:08:25,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 592 events. 331/592 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1717 event pairs, 208 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1295. Up to 491 conditions per place. [2022-12-13 13:08:25,443 INFO L137 encePairwiseOnDemand]: 405/410 looper letters, 48 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2022-12-13 13:08:25,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 301 flow [2022-12-13 13:08:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:08:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:08:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 876 transitions. [2022-12-13 13:08:25,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2022-12-13 13:08:25,444 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 876 transitions. [2022-12-13 13:08:25,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 876 transitions. [2022-12-13 13:08:25,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:25,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 876 transitions. [2022-12-13 13:08:25,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 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) [2022-12-13 13:08:25,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 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) [2022-12-13 13:08:25,447 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 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) [2022-12-13 13:08:25,447 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 187 flow. Second operand 4 states and 876 transitions. [2022-12-13 13:08:25,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 301 flow [2022-12-13 13:08:25,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:08:25,448 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 187 flow [2022-12-13 13:08:25,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-12-13 13:08:25,449 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -37 predicate places. [2022-12-13 13:08:25,449 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 187 flow [2022-12-13 13:08:25,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2022-12-13 13:08:25,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:25,449 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:25,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-12-13 13:08:25,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:25,650 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:25,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:25,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1389409820, now seen corresponding path program 1 times [2022-12-13 13:08:25,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:25,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212892285] [2022-12-13 13:08:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:25,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:25,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:25,651 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:25,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 13:08:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:25,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 13:08:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:25,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:25,860 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:25,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:25,926 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:25,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:25,977 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:25,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:26,045 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:26,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:26,084 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:26,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:26,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:26,133 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 13:08:26,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 13:08:26,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2022-12-13 13:08:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:26,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:26,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:26,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212892285] [2022-12-13 13:08:26,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212892285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:26,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:26,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:08:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957479811] [2022-12-13 13:08:26,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:26,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:08:26,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:26,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:08:26,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:08:28,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 410 [2022-12-13 13:08:28,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 209.66666666666666) internal successors, (1258), 6 states have internal predecessors, (1258), 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) [2022-12-13 13:08:28,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:28,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 410 [2022-12-13 13:08:28,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:29,156 INFO L130 PetriNetUnfolder]: 326/589 cut-off events. [2022-12-13 13:08:29,156 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-12-13 13:08:29,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 589 events. 326/589 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1713 event pairs, 205 based on Foata normal form. 1/556 useless extension candidates. Maximal degree in co-relation 1282. Up to 486 conditions per place. [2022-12-13 13:08:29,157 INFO L137 encePairwiseOnDemand]: 405/410 looper letters, 45 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2022-12-13 13:08:29,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 297 flow [2022-12-13 13:08:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:08:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:08:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 865 transitions. [2022-12-13 13:08:29,159 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2022-12-13 13:08:29,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 865 transitions. [2022-12-13 13:08:29,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 865 transitions. [2022-12-13 13:08:29,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:29,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 865 transitions. [2022-12-13 13:08:29,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.25) internal successors, (865), 4 states have internal predecessors, (865), 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) [2022-12-13 13:08:29,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 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) [2022-12-13 13:08:29,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 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) [2022-12-13 13:08:29,162 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 187 flow. Second operand 4 states and 865 transitions. [2022-12-13 13:08:29,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 297 flow [2022-12-13 13:08:29,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 289 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:08:29,163 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 196 flow [2022-12-13 13:08:29,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2022-12-13 13:08:29,164 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -36 predicate places. [2022-12-13 13:08:29,164 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 196 flow [2022-12-13 13:08:29,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 209.66666666666666) internal successors, (1258), 6 states have internal predecessors, (1258), 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) [2022-12-13 13:08:29,164 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:29,164 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:29,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 13:08:29,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:29,365 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash 122028993, now seen corresponding path program 1 times [2022-12-13 13:08:29,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:29,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82518658] [2022-12-13 13:08:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:29,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:29,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:29,371 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:29,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 13:08:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 13:08:29,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:29,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:29,607 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:29,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:29,651 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:29,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:29,694 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:29,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:29,726 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:29,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:29,756 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:29,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:29,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:29,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:30,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:30,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:30,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:30,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:30,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82518658] [2022-12-13 13:08:30,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82518658] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:30,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:30,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:08:30,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318224392] [2022-12-13 13:08:30,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:30,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:08:30,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:30,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:08:30,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:08:32,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 410 [2022-12-13 13:08:32,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 196 flow. Second operand has 8 states, 8 states have (on average 204.75) internal successors, (1638), 8 states have internal predecessors, (1638), 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) [2022-12-13 13:08:32,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:32,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 410 [2022-12-13 13:08:32,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:32,827 INFO L130 PetriNetUnfolder]: 326/588 cut-off events. [2022-12-13 13:08:32,827 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-12-13 13:08:32,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 588 events. 326/588 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1709 event pairs, 204 based on Foata normal form. 1/555 useless extension candidates. Maximal degree in co-relation 1289. Up to 486 conditions per place. [2022-12-13 13:08:32,829 INFO L137 encePairwiseOnDemand]: 403/410 looper letters, 45 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2022-12-13 13:08:32,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 322 flow [2022-12-13 13:08:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:08:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:08:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1254 transitions. [2022-12-13 13:08:32,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2022-12-13 13:08:32,831 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1254 transitions. [2022-12-13 13:08:32,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1254 transitions. [2022-12-13 13:08:32,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:32,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1254 transitions. [2022-12-13 13:08:32,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 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) [2022-12-13 13:08:32,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 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) [2022-12-13 13:08:32,835 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 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) [2022-12-13 13:08:32,835 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 196 flow. Second operand 6 states and 1254 transitions. [2022-12-13 13:08:32,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 322 flow [2022-12-13 13:08:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 312 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:08:32,836 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 210 flow [2022-12-13 13:08:32,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2022-12-13 13:08:32,836 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -33 predicate places. [2022-12-13 13:08:32,836 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 210 flow [2022-12-13 13:08:32,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 204.75) internal successors, (1638), 8 states have internal predecessors, (1638), 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) [2022-12-13 13:08:32,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:32,837 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:32,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 13:08:33,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:33,038 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:33,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:33,039 INFO L85 PathProgramCache]: Analyzing trace with hash -512073801, now seen corresponding path program 1 times [2022-12-13 13:08:33,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:33,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089595822] [2022-12-13 13:08:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:33,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:33,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:33,044 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:33,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 13:08:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:33,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 13:08:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:33,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:33,379 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:33,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:33,441 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:33,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:33,523 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:33,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:33,624 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:33,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:33,694 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:33,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:33,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:33,813 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 13:08:33,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 13:08:35,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2022-12-13 13:08:35,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:35,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:35,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:35,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:35,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089595822] [2022-12-13 13:08:35,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089595822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:35,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:35,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 13:08:35,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149896634] [2022-12-13 13:08:35,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:35,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:08:35,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:08:35,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:08:38,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 410 [2022-12-13 13:08:38,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 210 flow. Second operand has 10 states, 10 states have (on average 200.2) internal successors, (2002), 10 states have internal predecessors, (2002), 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) [2022-12-13 13:08:38,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:38,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 410 [2022-12-13 13:08:38,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:39,074 INFO L130 PetriNetUnfolder]: 326/587 cut-off events. [2022-12-13 13:08:39,075 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2022-12-13 13:08:39,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 587 events. 326/587 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1700 event pairs, 203 based on Foata normal form. 1/554 useless extension candidates. Maximal degree in co-relation 1299. Up to 486 conditions per place. [2022-12-13 13:08:39,077 INFO L137 encePairwiseOnDemand]: 402/410 looper letters, 46 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2022-12-13 13:08:39,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 344 flow [2022-12-13 13:08:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:08:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 13:08:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1627 transitions. [2022-12-13 13:08:39,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49603658536585366 [2022-12-13 13:08:39,081 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1627 transitions. [2022-12-13 13:08:39,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1627 transitions. [2022-12-13 13:08:39,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:39,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1627 transitions. [2022-12-13 13:08:39,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 203.375) internal successors, (1627), 8 states have internal predecessors, (1627), 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) [2022-12-13 13:08:39,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 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) [2022-12-13 13:08:39,085 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 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) [2022-12-13 13:08:39,085 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 210 flow. Second operand 8 states and 1627 transitions. [2022-12-13 13:08:39,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 344 flow [2022-12-13 13:08:39,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 328 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 13:08:39,086 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 218 flow [2022-12-13 13:08:39,086 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2022-12-13 13:08:39,086 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -30 predicate places. [2022-12-13 13:08:39,086 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 218 flow [2022-12-13 13:08:39,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 200.2) internal successors, (2002), 10 states have internal predecessors, (2002), 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) [2022-12-13 13:08:39,087 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:39,087 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:39,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 13:08:39,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:39,289 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1305579351, now seen corresponding path program 1 times [2022-12-13 13:08:39,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:39,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686537711] [2022-12-13 13:08:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:39,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:39,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:39,295 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:39,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 13:08:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:39,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 13:08:39,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:39,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:39,634 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:39,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:39,698 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:39,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:39,817 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:39,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:39,957 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-12-13 13:08:39,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-12-13 13:08:40,158 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-12-13 13:08:40,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-12-13 13:08:40,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:40,474 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-12-13 13:08:40,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2022-12-13 13:08:44,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 67 [2022-12-13 13:08:44,662 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 13:08:44,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 52 [2022-12-13 13:08:44,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:44,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:45,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:45,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:45,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686537711] [2022-12-13 13:08:45,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686537711] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:45,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:45,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 13:08:45,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008632387] [2022-12-13 13:08:45,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:45,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:08:45,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:08:45,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:08:50,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 410 [2022-12-13 13:08:50,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 218 flow. Second operand has 12 states, 12 states have (on average 195.83333333333334) internal successors, (2350), 12 states have internal predecessors, (2350), 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) [2022-12-13 13:08:50,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:50,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 410 [2022-12-13 13:08:50,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:51,635 INFO L130 PetriNetUnfolder]: 326/586 cut-off events. [2022-12-13 13:08:51,636 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-12-13 13:08:51,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 586 events. 326/586 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1694 event pairs, 202 based on Foata normal form. 1/553 useless extension candidates. Maximal degree in co-relation 1302. Up to 486 conditions per place. [2022-12-13 13:08:51,637 INFO L137 encePairwiseOnDemand]: 400/410 looper letters, 46 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2022-12-13 13:08:51,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 66 transitions, 368 flow [2022-12-13 13:08:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:08:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 13:08:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1984 transitions. [2022-12-13 13:08:51,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48390243902439023 [2022-12-13 13:08:51,640 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1984 transitions. [2022-12-13 13:08:51,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1984 transitions. [2022-12-13 13:08:51,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:51,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1984 transitions. [2022-12-13 13:08:51,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.4) internal successors, (1984), 10 states have internal predecessors, (1984), 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) [2022-12-13 13:08:51,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 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) [2022-12-13 13:08:51,645 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 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) [2022-12-13 13:08:51,645 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 218 flow. Second operand 10 states and 1984 transitions. [2022-12-13 13:08:51,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 66 transitions, 368 flow [2022-12-13 13:08:51,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 66 transitions, 350 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 13:08:51,647 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 230 flow [2022-12-13 13:08:51,647 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=230, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2022-12-13 13:08:51,648 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -27 predicate places. [2022-12-13 13:08:51,648 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 230 flow [2022-12-13 13:08:51,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.83333333333334) internal successors, (2350), 12 states have internal predecessors, (2350), 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) [2022-12-13 13:08:51,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:51,649 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:51,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 13:08:51,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:51,850 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:08:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1818254292, now seen corresponding path program 1 times [2022-12-13 13:08:51,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:51,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562075561] [2022-12-13 13:08:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:51,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:51,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:51,854 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:08:51,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 13:08:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:52,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 13:08:52,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:52,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:08:52,095 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:52,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:52,162 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:52,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:52,252 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:52,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:52,382 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:52,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:52,590 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 13:08:52,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 13:08:52,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:52,907 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 13:08:52,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 13:08:55,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2022-12-13 13:08:56,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:56,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:56,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:56,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:08:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:56,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:56,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:56,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562075561] [2022-12-13 13:08:56,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562075561] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:56,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:56,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 13:08:56,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265369725] [2022-12-13 13:08:56,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:56,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:08:56,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:08:56,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:09:00,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 410 [2022-12-13 13:09:00,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 230 flow. Second operand has 14 states, 14 states have (on average 191.5) internal successors, (2681), 14 states have internal predecessors, (2681), 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) [2022-12-13 13:09:00,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:09:00,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 410 [2022-12-13 13:09:00,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:09:01,614 INFO L130 PetriNetUnfolder]: 326/585 cut-off events. [2022-12-13 13:09:01,615 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2022-12-13 13:09:01,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1313 conditions, 585 events. 326/585 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1692 event pairs, 202 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 1304. Up to 483 conditions per place. [2022-12-13 13:09:01,616 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 43 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2022-12-13 13:09:01,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 66 transitions, 372 flow [2022-12-13 13:09:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:09:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 13:09:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2132 transitions. [2022-12-13 13:09:01,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2022-12-13 13:09:01,619 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2132 transitions. [2022-12-13 13:09:01,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2132 transitions. [2022-12-13 13:09:01,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:09:01,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2132 transitions. [2022-12-13 13:09:01,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 193.8181818181818) internal successors, (2132), 11 states have internal predecessors, (2132), 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) [2022-12-13 13:09:01,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 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) [2022-12-13 13:09:01,625 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 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) [2022-12-13 13:09:01,625 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 230 flow. Second operand 11 states and 2132 transitions. [2022-12-13 13:09:01,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 66 transitions, 372 flow [2022-12-13 13:09:01,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 329 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-12-13 13:09:01,626 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 205 flow [2022-12-13 13:09:01,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=205, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2022-12-13 13:09:01,627 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2022-12-13 13:09:01,627 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 205 flow [2022-12-13 13:09:01,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 191.5) internal successors, (2681), 14 states have internal predecessors, (2681), 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) [2022-12-13 13:09:01,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:09:01,627 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:09:01,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 13:09:01,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:09:01,828 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2022-12-13 13:09:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash -709300269, now seen corresponding path program 1 times [2022-12-13 13:09:01,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:09:01,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822572710] [2022-12-13 13:09:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:01,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:09:01,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:09:01,830 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:09:01,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 13:09:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:09:02,028 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:09:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:09:02,232 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 13:09:02,232 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:09:02,233 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (72 of 73 remaining) [2022-12-13 13:09:02,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 73 remaining) [2022-12-13 13:09:02,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 73 remaining) [2022-12-13 13:09:02,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (51 of 73 remaining) [2022-12-13 13:09:02,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 73 remaining) [2022-12-13 13:09:02,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (34 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 73 remaining) [2022-12-13 13:09:02,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 73 remaining) [2022-12-13 13:09:02,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 73 remaining) [2022-12-13 13:09:02,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 73 remaining) [2022-12-13 13:09:02,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 73 remaining) [2022-12-13 13:09:02,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 73 remaining) [2022-12-13 13:09:02,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 73 remaining) [2022-12-13 13:09:02,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 73 remaining) [2022-12-13 13:09:02,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 73 remaining) [2022-12-13 13:09:02,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 73 remaining) [2022-12-13 13:09:02,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 73 remaining) [2022-12-13 13:09:02,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 13:09:02,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:09:02,443 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:09:02,459 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 13:09:02,459 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 13:09:02,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 01:09:02 BasicIcfg [2022-12-13 13:09:02,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 13:09:02,535 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 13:09:02,535 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 13:09:02,535 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 13:09:02,536 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:07:49" (3/4) ... [2022-12-13 13:09:02,538 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 13:09:02,538 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 13:09:02,538 INFO L158 Benchmark]: Toolchain (without parser) took 74224.64ms. Allocated memory was 109.1MB in the beginning and 2.8GB in the end (delta: 2.7GB). Free memory was 84.8MB in the beginning and 845.5MB in the end (delta: -760.7MB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2022-12-13 13:09:02,538 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 69.2MB. Free memory was 47.1MB in the beginning and 47.0MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:09:02,539 INFO L158 Benchmark]: CACSL2BoogieTranslator took 549.69ms. Allocated memory is still 109.1MB. Free memory was 84.5MB in the beginning and 72.1MB in the end (delta: 12.5MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2022-12-13 13:09:02,539 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.31ms. Allocated memory is still 109.1MB. Free memory was 72.1MB in the beginning and 69.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:09:02,539 INFO L158 Benchmark]: Boogie Preprocessor took 27.58ms. Allocated memory is still 109.1MB. Free memory was 69.6MB in the beginning and 67.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:09:02,539 INFO L158 Benchmark]: RCFGBuilder took 539.85ms. Allocated memory is still 109.1MB. Free memory was 67.5MB in the beginning and 43.7MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-12-13 13:09:02,539 INFO L158 Benchmark]: TraceAbstraction took 73055.59ms. Allocated memory was 109.1MB in the beginning and 2.8GB in the end (delta: 2.7GB). Free memory was 43.2MB in the beginning and 846.5MB in the end (delta: -803.4MB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. [2022-12-13 13:09:02,539 INFO L158 Benchmark]: Witness Printer took 2.62ms. Allocated memory is still 2.8GB. Free memory was 846.5MB in the beginning and 845.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:09:02,541 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 69.2MB. Free memory was 47.1MB in the beginning and 47.0MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 549.69ms. Allocated memory is still 109.1MB. Free memory was 84.5MB in the beginning and 72.1MB in the end (delta: 12.5MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.31ms. Allocated memory is still 109.1MB. Free memory was 72.1MB in the beginning and 69.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.58ms. Allocated memory is still 109.1MB. Free memory was 69.6MB in the beginning and 67.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 539.85ms. Allocated memory is still 109.1MB. Free memory was 67.5MB in the beginning and 43.7MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 73055.59ms. Allocated memory was 109.1MB in the beginning and 2.8GB in the end (delta: 2.7GB). Free memory was 43.2MB in the beginning and 846.5MB in the end (delta: -803.4MB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. * Witness Printer took 2.62ms. Allocated memory is still 2.8GB. Free memory was 846.5MB in the beginning and 845.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.3s, 186 PlacesBefore, 101 PlacesAfterwards, 174 TransitionsBefore, 87 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 6 FixpointIterations, 58 TrivialSequentialCompositions, 81 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 150 TotalNumberOfCompositions, 7301 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4478, independent: 4182, independent conditional: 0, independent unconditional: 4182, dependent: 296, dependent conditional: 0, dependent unconditional: 296, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1286, independent: 1222, independent conditional: 0, independent unconditional: 1222, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4478, independent: 2960, independent conditional: 0, independent unconditional: 2960, dependent: 232, dependent conditional: 0, dependent unconditional: 232, unknown: 1286, unknown conditional: 0, unknown unconditional: 1286] , Statistics on independence cache: Total cache size (in pairs): 146, Positive cache size: 120, Positive conditional cache size: 0, Positive unconditional cache size: 120, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1159]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1159. Possible FailurePath: [L1124] 0 char *v; [L1161] 0 pthread_t t; [L1162] FCALL, FORK 0 pthread_create(&t, 0, thread0, 0) VAL [arg={0:0}, pthread_create(&t, 0, thread0, 0)=1, t={-2147483603:0}, v={0:0}] [L1146] 1 pthread_t t1, t2, t3, t4, t5; [L1147] FCALL, FORK 1 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=2, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={0:0}] [L1127] 2 v = malloc(sizeof(char)) [L1128] 2 return 0; [L1148] 1 \read(t1) VAL [\read(t1)=2, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1148] FCALL, JOIN 2 pthread_join(t1, 0) VAL [\read(t1)=2, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1149] FCALL, FORK 1 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=3, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1133] 3 v[0] = 'X' [L1135] 3 return 0; [L1150] FCALL, FORK 1 pthread_create(&t3, 0, thread3, 0) VAL [\result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=4, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1140] 4 v[0] = 'Y' [L1142] 4 return 0; [L1151] FCALL, FORK 1 pthread_create(&t4, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=5, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1133] 5 v[0] = 'X' [L1135] 5 return 0; [L1152] FCALL, FORK 1 pthread_create(&t5, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=6, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1133] 6 v[0] = 'X' [L1135] 6 return 0; [L1153] 1 \read(t2) VAL [\read(t2)=3, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [\read(t2)=3, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1154] 1 \read(t3) VAL [\read(t3)=4, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [\read(t3)=4, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1155] 1 \read(t4) VAL [\read(t4)=5, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [\read(t4)=5, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1156] 1 \read(t5) VAL [\read(t5)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [\read(t5)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t2={15:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t3={23:0}, t4={45:0}, t5={13:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1163] 0 \read(t) VAL [\read(t)=1, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={-2147483603:0}, v={3:0}] [L1163] FCALL, JOIN 1 pthread_join(t, 0) VAL [\read(t)=1, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={-2147483603:0}, v={3:0}] [L1164] EXPR 0 v[0] [L1164] EXPR 0 v[0] == 'X' || v[0] == 'Y' [L1164] CALL 0 __VERIFIER_assert(v[0] == 'X' || v[0] == 'Y') [L1123] COND FALSE 0 !(!expression) [L1164] RET 0 __VERIFIER_assert(v[0] == 'X' || v[0] == 'Y') [L1165] 0 return 0; [L1165] 0 return 0; - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1152]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1150]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1147]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1149]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1151]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1162]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1150]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1152]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1149]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1151]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1147]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 11 procedures, 295 locations, 73 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 72.8s, OverallIterations: 20, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 39.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.4s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 8459 SdHoareTripleChecker+Valid, 28.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5766 mSDsluCounter, 677 SdHoareTripleChecker+Invalid, 26.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 513 mSDsCounter, 577 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11733 IncrementalHoareTripleChecker+Invalid, 12314 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 577 mSolverCounterUnsat, 164 mSDtfsCounter, 11733 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 403 GetRequests, 295 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=245occurred in iteration=3, InterpolantAutomatonStates: 91, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 15.3s InterpolantComputationTime, 429 NumberOfCodeBlocks, 429 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 365 ConstructedInterpolants, 179 QuantifiedInterpolants, 10806 SizeOfPredicates, 54 NumberOfNonLiveVariables, 2730 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 13:09:02,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_312ef1cb-b048-46f2-854b-e705b8beddc3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample