./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/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_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/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_76c7ea69-3b6e-48a9-a397-36589bec2067/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 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 --- 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 19:43:10,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:43:10,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:43:10,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:43:10,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:43:10,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:43:10,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:43:10,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:43:10,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:43:10,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:43:10,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:43:10,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:43:10,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:43:10,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:43:10,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:43:10,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:43:10,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:43:10,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:43:10,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:43:10,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:43:10,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:43:10,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:43:10,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:43:10,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:43:10,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:43:10,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:43:10,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:43:10,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:43:10,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:43:10,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:43:10,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:43:10,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:43:10,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:43:10,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:43:10,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:43:10,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:43:10,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:43:10,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:43:10,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:43:10,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:43:10,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:43:10,101 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:43:10,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:43:10,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:43:10,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:43:10,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:43:10,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:43:10,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:43:10,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:43:10,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:43:10,117 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:43:10,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:43:10,118 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:43:10,118 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:43:10,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:43:10,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:43:10,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:43:10,118 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:43:10,118 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:43:10,118 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:43:10,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:43:10,119 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:43:10,119 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:43:10,119 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:43:10,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:43:10,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:43:10,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:43:10,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:43:10,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:43:10,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:43:10,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:43:10,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:43:10,120 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:43:10,120 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:43:10,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:43:10,120 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:43:10,120 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_76c7ea69-3b6e-48a9-a397-36589bec2067/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 [2022-12-13 19:43:10,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:43:10,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:43:10,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:43:10,314 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:43:10,314 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:43:10,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-12-13 19:43:12,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:43:13,060 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:43:13,060 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-12-13 19:43:13,068 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/data/a036c4e88/bd6b6f187dc146f6a1c0567aab6bdeed/FLAG4bb3c4971 [2022-12-13 19:43:13,079 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/data/a036c4e88/bd6b6f187dc146f6a1c0567aab6bdeed [2022-12-13 19:43:13,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:43:13,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:43:13,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:43:13,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:43:13,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:43:13,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a3b286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13, skipping insertion in model container [2022-12-13 19:43:13,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:43:13,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:43:13,308 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_76c7ea69-3b6e-48a9-a397-36589bec2067/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-12-13 19:43:13,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,315 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,317 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,318 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,324 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:43:13,332 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:43:13,353 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_76c7ea69-3b6e-48a9-a397-36589bec2067/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-12-13 19:43:13,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,356 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,359 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:43:13,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:43:13,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:43:13,379 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:43:13,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13 WrapperNode [2022-12-13 19:43:13,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:43:13,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:43:13,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:43:13,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:43:13,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,408 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 19:43:13,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:43:13,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:43:13,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:43:13,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:43:13,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,424 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:43:13,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:43:13,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:43:13,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:43:13,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (1/1) ... [2022-12-13 19:43:13,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:43:13,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:13,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:43:13,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:43:13,481 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 19:43:13,481 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 19:43:13,481 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 19:43:13,482 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 19:43:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:43:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 19:43:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:43:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:43:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:43:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:43:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 19:43:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:43:13,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:43:13,483 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 19:43:13,584 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:43:13,586 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:43:13,750 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:43:13,758 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:43:13,758 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 19:43:13,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:43:13 BoogieIcfgContainer [2022-12-13 19:43:13,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:43:13,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:43:13,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:43:13,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:43:13,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:43:13" (1/3) ... [2022-12-13 19:43:13,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e421d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:43:13, skipping insertion in model container [2022-12-13 19:43:13,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:13" (2/3) ... [2022-12-13 19:43:13,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e421d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:43:13, skipping insertion in model container [2022-12-13 19:43:13,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:43:13" (3/3) ... [2022-12-13 19:43:13,770 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2022-12-13 19:43:13,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:43:13,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-13 19:43:13,795 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:43:13,848 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 19:43:13,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-12-13 19:43:13,917 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-12-13 19:43:13,917 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:13,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-12-13 19:43:13,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 109 transitions, 228 flow [2022-12-13 19:43:13,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 220 flow [2022-12-13 19:43:13,928 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:43:13,936 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 107 transitions, 220 flow [2022-12-13 19:43:13,938 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 107 transitions, 220 flow [2022-12-13 19:43:13,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 220 flow [2022-12-13 19:43:13,960 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-12-13 19:43:13,960 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-12-13 19:43:13,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-12-13 19:43:16,983 INFO L134 LiptonReduction]: Checked pairs total: 1725 [2022-12-13 19:43:16,983 INFO L136 LiptonReduction]: Total number of compositions: 117 [2022-12-13 19:43:16,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:43:17,001 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;@567d94b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:43:17,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 19:43:17,002 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 19:43:17,002 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:17,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:17,003 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 19:43:17,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash 421, now seen corresponding path program 1 times [2022-12-13 19:43:17,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:17,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381704269] [2022-12-13 19:43:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:17,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:17,085 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 19:43:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381704269] [2022-12-13 19:43:17,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381704269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:17,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:43:17,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 19:43:17,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817295783] [2022-12-13 19:43:17,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:17,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:43:17,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:43:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:43:17,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 226 [2022-12-13 19:43:17,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:17,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 226 [2022-12-13 19:43:17,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:17,163 INFO L130 PetriNetUnfolder]: 103/161 cut-off events. [2022-12-13 19:43:17,163 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:43:17,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 161 events. 103/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 401 event pairs, 60 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 324. Up to 162 conditions per place. [2022-12-13 19:43:17,166 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2022-12-13 19:43:17,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2022-12-13 19:43:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:43:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 19:43:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2022-12-13 19:43:17,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49336283185840707 [2022-12-13 19:43:17,177 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2022-12-13 19:43:17,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2022-12-13 19:43:17,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:17,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2022-12-13 19:43:17,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,188 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,190 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 2 states and 223 transitions. [2022-12-13 19:43:17,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2022-12-13 19:43:17,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:43:17,194 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 36 flow [2022-12-13 19:43:17,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-12-13 19:43:17,198 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 19:43:17,198 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 36 flow [2022-12-13 19:43:17,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,199 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:17,199 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:43:17,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:43:17,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash 411490, now seen corresponding path program 1 times [2022-12-13 19:43:17,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:17,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720068487] [2022-12-13 19:43:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:17,313 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 19:43:17,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:17,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720068487] [2022-12-13 19:43:17,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720068487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:17,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:43:17,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:43:17,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530396388] [2022-12-13 19:43:17,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:17,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:43:17,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:17,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:43:17,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:43:17,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 226 [2022-12-13 19:43:17,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:17,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 226 [2022-12-13 19:43:17,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:17,376 INFO L130 PetriNetUnfolder]: 82/128 cut-off events. [2022-12-13 19:43:17,376 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:17,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 128 events. 82/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 285 event pairs, 34 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 264. Up to 101 conditions per place. [2022-12-13 19:43:17,377 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-12-13 19:43:17,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 88 flow [2022-12-13 19:43:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:43:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:43:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2022-12-13 19:43:17,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4528023598820059 [2022-12-13 19:43:17,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2022-12-13 19:43:17,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2022-12-13 19:43:17,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:17,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2022-12-13 19:43:17,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 19:43:17,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,382 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 36 flow. Second operand 3 states and 307 transitions. [2022-12-13 19:43:17,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 88 flow [2022-12-13 19:43:17,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:43:17,383 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2022-12-13 19:43:17,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-12-13 19:43:17,383 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 19:43:17,383 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2022-12-13 19:43:17,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:17,384 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:43:17,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:43:17,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:17,384 INFO L85 PathProgramCache]: Analyzing trace with hash 411488, now seen corresponding path program 1 times [2022-12-13 19:43:17,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:17,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683426825] [2022-12-13 19:43:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:17,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:17,458 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 19:43:17,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:17,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683426825] [2022-12-13 19:43:17,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683426825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:17,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:43:17,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:43:17,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243901230] [2022-12-13 19:43:17,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:17,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:43:17,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:17,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:43:17,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:43:17,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-12-13 19:43:17,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:17,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-12-13 19:43:17,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:17,514 INFO L130 PetriNetUnfolder]: 79/122 cut-off events. [2022-12-13 19:43:17,514 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:43:17,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 122 events. 79/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 259 event pairs, 32 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 262. Up to 95 conditions per place. [2022-12-13 19:43:17,515 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2022-12-13 19:43:17,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 88 flow [2022-12-13 19:43:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:43:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:43:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2022-12-13 19:43:17,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646017699115044 [2022-12-13 19:43:17,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2022-12-13 19:43:17,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2022-12-13 19:43:17,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:17,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2022-12-13 19:43:17,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 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 19:43:17,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,521 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 38 flow. Second operand 3 states and 315 transitions. [2022-12-13 19:43:17,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 88 flow [2022-12-13 19:43:17,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:43:17,522 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 36 flow [2022-12-13 19:43:17,522 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-12-13 19:43:17,523 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2022-12-13 19:43:17,523 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 36 flow [2022-12-13 19:43:17,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:17,524 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:43:17,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:43:17,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:17,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash -625957232, now seen corresponding path program 1 times [2022-12-13 19:43:17,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:17,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514888491] [2022-12-13 19:43:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:17,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:17,567 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 19:43:17,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:17,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514888491] [2022-12-13 19:43:17,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514888491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:17,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:43:17,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:43:17,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062082897] [2022-12-13 19:43:17,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:17,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:43:17,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:43:17,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:43:17,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-12-13 19:43:17,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:17,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-12-13 19:43:17,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:17,612 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-13 19:43:17,613 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:43:17,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 149 events. 97/149 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 20 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 316. Up to 91 conditions per place. [2022-12-13 19:43:17,614 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-12-13 19:43:17,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 92 flow [2022-12-13 19:43:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:43:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:43:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-12-13 19:43:17,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46755162241887904 [2022-12-13 19:43:17,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-12-13 19:43:17,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-12-13 19:43:17,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:17,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-12-13 19:43:17,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,618 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 36 flow. Second operand 3 states and 317 transitions. [2022-12-13 19:43:17,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 92 flow [2022-12-13 19:43:17,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:43:17,618 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 46 flow [2022-12-13 19:43:17,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-12-13 19:43:17,619 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 19:43:17,619 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 46 flow [2022-12-13 19:43:17,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:17,619 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:17,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:43:17,620 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:17,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2070162338, now seen corresponding path program 1 times [2022-12-13 19:43:17,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:17,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124625779] [2022-12-13 19:43:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:17,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:17,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124625779] [2022-12-13 19:43:17,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124625779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071402095] [2022-12-13 19:43:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:17,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:17,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:17,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:17,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:43:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:43:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:17,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:17,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071402095] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:17,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:17,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:43:17,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539124203] [2022-12-13 19:43:17,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:17,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:43:17,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:17,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:43:17,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:43:17,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 19:43:17,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 46 flow. Second operand has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:17,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 19:43:17,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:17,881 INFO L130 PetriNetUnfolder]: 151/230 cut-off events. [2022-12-13 19:43:17,882 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:43:17,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 230 events. 151/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 526 event pairs, 20 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 541. Up to 91 conditions per place. [2022-12-13 19:43:17,883 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-12-13 19:43:17,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 190 flow [2022-12-13 19:43:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:43:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:43:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2022-12-13 19:43:17,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646017699115044 [2022-12-13 19:43:17,885 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2022-12-13 19:43:17,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2022-12-13 19:43:17,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:17,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2022-12-13 19:43:17,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,888 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,888 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 46 flow. Second operand 6 states and 630 transitions. [2022-12-13 19:43:17,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 190 flow [2022-12-13 19:43:17,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:43:17,889 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 86 flow [2022-12-13 19:43:17,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2022-12-13 19:43:17,890 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-12-13 19:43:17,890 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 86 flow [2022-12-13 19:43:17,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:17,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:17,890 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:17,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:43:18,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:18,092 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:18,093 INFO L85 PathProgramCache]: Analyzing trace with hash 770857744, now seen corresponding path program 2 times [2022-12-13 19:43:18,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:18,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378873218] [2022-12-13 19:43:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:18,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:18,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:18,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378873218] [2022-12-13 19:43:18,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378873218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:18,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628636957] [2022-12-13 19:43:18,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:43:18,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:18,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:18,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:18,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:43:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:43:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 19:43:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:43:18,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:43:18,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628636957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:18,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:43:18,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-12-13 19:43:18,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42179064] [2022-12-13 19:43:18,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:18,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:43:18,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:18,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:43:18,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:43:18,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 19:43:18,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:18,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:18,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 19:43:18,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:18,506 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-13 19:43:18,506 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-12-13 19:43:18,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 203 events. 133/203 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 444 event pairs, 80 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 569. Up to 203 conditions per place. [2022-12-13 19:43:18,507 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-12-13 19:43:18,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 110 flow [2022-12-13 19:43:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:43:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:43:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2022-12-13 19:43:18,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277286135693215 [2022-12-13 19:43:18,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2022-12-13 19:43:18,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2022-12-13 19:43:18,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:18,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2022-12-13 19:43:18,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:18,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:18,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:18,510 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 86 flow. Second operand 3 states and 290 transitions. [2022-12-13 19:43:18,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 110 flow [2022-12-13 19:43:18,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 96 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 19:43:18,512 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 64 flow [2022-12-13 19:43:18,512 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2022-12-13 19:43:18,512 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-12-13 19:43:18,512 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 64 flow [2022-12-13 19:43:18,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:18,513 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:18,513 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:18,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:43:18,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:18,714 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:18,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:18,714 INFO L85 PathProgramCache]: Analyzing trace with hash 770857736, now seen corresponding path program 1 times [2022-12-13 19:43:18,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:18,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798895422] [2022-12-13 19:43:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:18,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:18,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:18,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798895422] [2022-12-13 19:43:18,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798895422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:18,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887545475] [2022-12-13 19:43:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:18,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:18,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:18,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:18,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:43:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:43:18,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:18,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:18,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887545475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:18,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:18,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 19:43:18,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721921953] [2022-12-13 19:43:18,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:18,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:43:18,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:43:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:43:18,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 19:43:18,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 64 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:18,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:18,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 19:43:18,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:19,042 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-13 19:43:19,042 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-12-13 19:43:19,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 365 events. 241/365 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 843 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 947. Up to 82 conditions per place. [2022-12-13 19:43:19,045 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-13 19:43:19,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 83 transitions, 386 flow [2022-12-13 19:43:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:43:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:43:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1253 transitions. [2022-12-13 19:43:19,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46202064896755163 [2022-12-13 19:43:19,048 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1253 transitions. [2022-12-13 19:43:19,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1253 transitions. [2022-12-13 19:43:19,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:19,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1253 transitions. [2022-12-13 19:43:19,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:19,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:19,057 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:19,057 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 64 flow. Second operand 12 states and 1253 transitions. [2022-12-13 19:43:19,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 83 transitions, 386 flow [2022-12-13 19:43:19,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 83 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:43:19,060 INFO L231 Difference]: Finished difference. Result has 43 places, 23 transitions, 147 flow [2022-12-13 19:43:19,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=23} [2022-12-13 19:43:19,061 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2022-12-13 19:43:19,061 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 23 transitions, 147 flow [2022-12-13 19:43:19,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:19,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:19,062 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:19,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:43:19,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:19,262 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:19,263 INFO L85 PathProgramCache]: Analyzing trace with hash -300928568, now seen corresponding path program 2 times [2022-12-13 19:43:19,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:19,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425707000] [2022-12-13 19:43:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:19,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:19,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:19,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425707000] [2022-12-13 19:43:19,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425707000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:19,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741368579] [2022-12-13 19:43:19,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:43:19,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:19,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:19,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:19,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:43:19,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:43:19,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:43:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:19,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:19,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741368579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:19,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:19,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 19:43:19,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523718486] [2022-12-13 19:43:19,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:19,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 19:43:19,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 19:43:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 19:43:19,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 19:43:19,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 23 transitions, 147 flow. Second operand has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:19,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:19,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 19:43:19,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:19,977 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-12-13 19:43:19,977 INFO L131 PetriNetUnfolder]: For 4203/4203 co-relation queries the response was YES. [2022-12-13 19:43:19,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 689 events. 457/689 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1641 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2127. Up to 190 conditions per place. [2022-12-13 19:43:19,982 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-12-13 19:43:19,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 167 transitions, 841 flow [2022-12-13 19:43:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 19:43:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 19:43:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2507 transitions. [2022-12-13 19:43:19,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4622050147492625 [2022-12-13 19:43:19,989 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2507 transitions. [2022-12-13 19:43:19,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2507 transitions. [2022-12-13 19:43:19,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:19,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2507 transitions. [2022-12-13 19:43:19,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 104.45833333333333) internal successors, (2507), 24 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:20,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:20,006 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:20,006 INFO L175 Difference]: Start difference. First operand has 43 places, 23 transitions, 147 flow. Second operand 24 states and 2507 transitions. [2022-12-13 19:43:20,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 167 transitions, 841 flow [2022-12-13 19:43:20,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 167 transitions, 769 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-12-13 19:43:20,014 INFO L231 Difference]: Finished difference. Result has 73 places, 35 transitions, 267 flow [2022-12-13 19:43:20,014 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=35} [2022-12-13 19:43:20,014 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 50 predicate places. [2022-12-13 19:43:20,015 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 35 transitions, 267 flow [2022-12-13 19:43:20,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:20,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:20,016 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:20,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:43:20,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 19:43:20,217 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:20,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:20,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1827909448, now seen corresponding path program 3 times [2022-12-13 19:43:20,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:20,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444404692] [2022-12-13 19:43:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:20,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:20,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:20,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444404692] [2022-12-13 19:43:20,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444404692] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601373393] [2022-12-13 19:43:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:43:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:20,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:20,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:20,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:43:20,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-13 19:43:20,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:43:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:20,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:20,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601373393] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:20,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:20,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-12-13 19:43:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208409642] [2022-12-13 19:43:20,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 19:43:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 19:43:20,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:43:20,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 19:43:20,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 35 transitions, 267 flow. Second operand has 27 states, 27 states have (on average 98.22222222222223) internal successors, (2652), 27 states have internal predecessors, (2652), 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 19:43:20,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:20,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 19:43:20,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:21,149 INFO L130 PetriNetUnfolder]: 493/743 cut-off events. [2022-12-13 19:43:21,149 INFO L131 PetriNetUnfolder]: For 5553/5553 co-relation queries the response was YES. [2022-12-13 19:43:21,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2424 conditions, 743 events. 493/743 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1773 event pairs, 20 based on Foata normal form. 18/597 useless extension candidates. Maximal degree in co-relation 2397. Up to 166 conditions per place. [2022-12-13 19:43:21,153 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 156 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2022-12-13 19:43:21,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 181 transitions, 933 flow [2022-12-13 19:43:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 19:43:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 19:43:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2705 transitions. [2022-12-13 19:43:21,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46034717494894484 [2022-12-13 19:43:21,157 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2705 transitions. [2022-12-13 19:43:21,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2705 transitions. [2022-12-13 19:43:21,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:21,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2705 transitions. [2022-12-13 19:43:21,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 104.03846153846153) internal successors, (2705), 26 states have internal predecessors, (2705), 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 19:43:21,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 226.0) internal successors, (6102), 27 states have internal predecessors, (6102), 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 19:43:21,166 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 226.0) internal successors, (6102), 27 states have internal predecessors, (6102), 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 19:43:21,166 INFO L175 Difference]: Start difference. First operand has 73 places, 35 transitions, 267 flow. Second operand 26 states and 2705 transitions. [2022-12-13 19:43:21,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 181 transitions, 933 flow [2022-12-13 19:43:21,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 181 transitions, 833 flow, removed 39 selfloop flow, removed 11 redundant places. [2022-12-13 19:43:21,174 INFO L231 Difference]: Finished difference. Result has 89 places, 37 transitions, 243 flow [2022-12-13 19:43:21,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=243, PETRI_PLACES=89, PETRI_TRANSITIONS=37} [2022-12-13 19:43:21,175 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 66 predicate places. [2022-12-13 19:43:21,175 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 37 transitions, 243 flow [2022-12-13 19:43:21,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 98.22222222222223) internal successors, (2652), 27 states have internal predecessors, (2652), 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 19:43:21,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:21,176 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:21,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:43:21,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 19:43:21,378 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:43:21,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:21,379 INFO L85 PathProgramCache]: Analyzing trace with hash -20635256, now seen corresponding path program 4 times [2022-12-13 19:43:21,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:21,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37448760] [2022-12-13 19:43:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:21,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:22,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37448760] [2022-12-13 19:43:22,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37448760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829911627] [2022-12-13 19:43:22,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:43:22,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:22,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:22,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:43:23,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:43:23,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:23,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-13 19:43:23,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:24,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:25,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829911627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:25,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:25,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-13 19:43:25,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487037117] [2022-12-13 19:43:25,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:25,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 19:43:25,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:25,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 19:43:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 19:43:26,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 19:43:26,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 37 transitions, 243 flow. Second operand has 77 states, 77 states have (on average 93.16883116883118) internal successors, (7174), 77 states have internal predecessors, (7174), 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 19:43:26,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:26,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 19:43:26,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:44:23,991 INFO L130 PetriNetUnfolder]: 87355/131052 cut-off events. [2022-12-13 19:44:23,991 INFO L131 PetriNetUnfolder]: For 742784/742784 co-relation queries the response was YES. [2022-12-13 19:44:24,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412808 conditions, 131052 events. 87355/131052 cut-off events. For 742784/742784 co-relation queries the response was YES. Maximal size of possible extension queue 2529. Compared 979970 event pairs, 106 based on Foata normal form. 209/98523 useless extension candidates. Maximal degree in co-relation 412779. Up to 27314 conditions per place. [2022-12-13 19:44:24,999 INFO L137 encePairwiseOnDemand]: 221/226 looper letters, 1759 selfloop transitions, 5829 changer transitions 0/7588 dead transitions. [2022-12-13 19:44:24,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 7588 transitions, 67712 flow [2022-12-13 19:44:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2022-12-13 19:44:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2022-12-13 19:44:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 35197 transitions. [2022-12-13 19:44:25,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.442440164923572 [2022-12-13 19:44:25,049 INFO L72 ComplementDD]: Start complementDD. Operand 352 states and 35197 transitions. [2022-12-13 19:44:25,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 352 states and 35197 transitions. [2022-12-13 19:44:25,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:44:25,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 352 states and 35197 transitions. [2022-12-13 19:44:25,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 353 states, 352 states have (on average 99.99147727272727) internal successors, (35197), 352 states have internal predecessors, (35197), 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 19:44:25,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 353 states, 353 states have (on average 226.0) internal successors, (79778), 353 states have internal predecessors, (79778), 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 19:44:25,209 INFO L81 ComplementDD]: Finished complementDD. Result has 353 states, 353 states have (on average 226.0) internal successors, (79778), 353 states have internal predecessors, (79778), 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 19:44:25,209 INFO L175 Difference]: Start difference. First operand has 89 places, 37 transitions, 243 flow. Second operand 352 states and 35197 transitions. [2022-12-13 19:44:25,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 7588 transitions, 67712 flow [2022-12-13 19:44:33,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 7588 transitions, 54902 flow, removed 2193 selfloop flow, removed 23 redundant places. [2022-12-13 19:44:33,972 INFO L231 Difference]: Finished difference. Result has 445 places, 5866 transitions, 35339 flow [2022-12-13 19:44:33,972 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=352, PETRI_FLOW=35339, PETRI_PLACES=445, PETRI_TRANSITIONS=5866} [2022-12-13 19:44:33,972 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2022-12-13 19:44:33,972 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 5866 transitions, 35339 flow [2022-12-13 19:44:33,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 93.16883116883118) internal successors, (7174), 77 states have internal predecessors, (7174), 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 19:44:33,973 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:44:33,974 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:33,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 19:44:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:44:34,174 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 19:44:34,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2020924066, now seen corresponding path program 1 times [2022-12-13 19:44:34,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:34,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455527923] [2022-12-13 19:44:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:44:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:44:35,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455527923] [2022-12-13 19:44:35,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455527923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:44:35,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846546983] [2022-12-13 19:44:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:35,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:35,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:35,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:35,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c7ea69-3b6e-48a9-a397-36589bec2067/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:44:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:44:35,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-13 19:44:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 211 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:44:36,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:44:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:44:38,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846546983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:44:38,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:44:38,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-13 19:44:38,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440239335] [2022-12-13 19:44:38,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:44:38,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 19:44:38,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:38,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 19:44:38,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=5715, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 19:44:40,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 19:44:40,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 5866 transitions, 35339 flow. Second operand has 83 states, 83 states have (on average 93.19277108433735) internal successors, (7735), 83 states have internal predecessors, (7735), 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 19:44:40,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:44:40,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 19:44:40,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand