./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 38b53e6a 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_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R --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 c7fcf270fc424e515c4f8db675612b386dd73dc1dc6be434bc2c22ad47252dc7 --- 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-38b53e6 [2022-11-25 15:30:30,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:30:30,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:30:30,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:30:30,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:30:30,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:30:30,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:30:30,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:30:30,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:30:30,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:30:30,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:30:30,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:30:30,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:30:30,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:30:30,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:30:30,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:30:30,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:30:30,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:30:30,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:30:30,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:30:30,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:30:30,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:30:30,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:30:30,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:30:30,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:30:30,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:30:30,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:30:30,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:30:30,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:30:30,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:30:30,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:30:30,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:30:30,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:30:30,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:30:30,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:30:30,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:30:30,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:30:30,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:30:30,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:30:30,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:30:30,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:30:30,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 15:30:30,553 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:30:30,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:30:30,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:30:30,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:30:30,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:30:30,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:30:30,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:30:30,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:30:30,557 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:30:30,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:30:30,557 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:30:30,557 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:30:30,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:30:30,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:30:30,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:30:30,558 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:30:30,559 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:30:30,559 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:30:30,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:30:30,559 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:30:30,560 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:30:30,560 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:30:30,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:30:30,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:30:30,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:30:30,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:30:30,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:30:30,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:30:30,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:30:30,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:30:30,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:30:30,563 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:30:30,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:30:30,563 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_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fcf270fc424e515c4f8db675612b386dd73dc1dc6be434bc2c22ad47252dc7 [2022-11-25 15:30:30,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:30:30,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:30:30,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:30:30,950 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:30:30,950 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:30:30,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-11-25 15:30:33,885 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:30:34,132 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:30:34,133 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/sv-benchmarks/c/pthread/fib_unsafe-11.i [2022-11-25 15:30:34,144 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/data/317ae0a1d/e9133f997e1248f8bd8d760a53460017/FLAG3fcb1785f [2022-11-25 15:30:34,159 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/data/317ae0a1d/e9133f997e1248f8bd8d760a53460017 [2022-11-25 15:30:34,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:30:34,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:30:34,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:30:34,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:30:34,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:30:34,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff3d0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34, skipping insertion in model container [2022-11-25 15:30:34,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:30:34,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:30:34,539 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_329abd5b-52f7-466e-9294-d6c787d0503c/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-11-25 15:30:34,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,552 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,558 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,558 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,562 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:30:34,575 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:30:34,611 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_329abd5b-52f7-466e-9294-d6c787d0503c/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2022-11-25 15:30:34,612 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,613 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,614 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,615 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,617 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,619 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,621 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:30:34,621 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:30:34,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:30:34,656 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:30:34,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34 WrapperNode [2022-11-25 15:30:34,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:30:34,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:30:34,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:30:34,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:30:34,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,700 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-25 15:30:34,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:30:34,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:30:34,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:30:34,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:30:34,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,723 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:30:34,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:30:34,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:30:34,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:30:34,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (1/1) ... [2022-11-25 15:30:34,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:30:34,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:34,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:30:34,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:30:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 15:30:34,828 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 15:30:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 15:30:34,828 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 15:30:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:30:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:30:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:30:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:30:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:30:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:30:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:30:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:30:34,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:30:34,831 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:30:34,957 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:30:34,959 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:30:35,249 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:30:35,256 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:30:35,257 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:30:35,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:30:35 BoogieIcfgContainer [2022-11-25 15:30:35,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:30:35,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:30:35,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:30:35,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:30:35,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:30:34" (1/3) ... [2022-11-25 15:30:35,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b3fb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:30:35, skipping insertion in model container [2022-11-25 15:30:35,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:30:34" (2/3) ... [2022-11-25 15:30:35,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b3fb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:30:35, skipping insertion in model container [2022-11-25 15:30:35,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:30:35" (3/3) ... [2022-11-25 15:30:35,268 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2022-11-25 15:30:35,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:30:35,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-25 15:30:35,290 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:30:35,394 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:30:35,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-11-25 15:30:35,533 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-25 15:30:35,535 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:30:35,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-25 15:30:35,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 109 transitions, 228 flow [2022-11-25 15:30:35,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 220 flow [2022-11-25 15:30:35,546 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:30:35,578 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 107 transitions, 220 flow [2022-11-25 15:30:35,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 107 transitions, 220 flow [2022-11-25 15:30:35,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 220 flow [2022-11-25 15:30:35,606 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-25 15:30:35,606 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:30:35,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-25 15:30:35,609 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-11-25 15:30:40,367 INFO L134 LiptonReduction]: Checked pairs total: 1749 [2022-11-25 15:30:40,368 INFO L136 LiptonReduction]: Total number of compositions: 117 [2022-11-25 15:30:40,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:30:40,392 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;@4e9801dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:30:40,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 15:30:40,394 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 15:30:40,394 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:30:40,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:40,395 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 15:30:40,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:40,401 INFO L85 PathProgramCache]: Analyzing trace with hash 417, now seen corresponding path program 1 times [2022-11-25 15:30:40,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:40,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586043106] [2022-11-25 15:30:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:40,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:40,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586043106] [2022-11-25 15:30:40,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586043106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:30:40,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:30:40,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 15:30:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542137474] [2022-11-25 15:30:40,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:30:40,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:30:40,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:40,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:30:40,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:30:40,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 226 [2022-11-25 15:30:40,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:40,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:40,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 226 [2022-11-25 15:30:40,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:40,665 INFO L130 PetriNetUnfolder]: 103/161 cut-off events. [2022-11-25 15:30:40,665 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:30:40,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 161 events. 103/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 391 event pairs, 60 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 324. Up to 162 conditions per place. [2022-11-25 15:30:40,670 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2022-11-25 15:30:40,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2022-11-25 15:30:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:30:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 15:30:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2022-11-25 15:30:40,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49336283185840707 [2022-11-25 15:30:40,689 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2022-11-25 15:30:40,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2022-11-25 15:30:40,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:40,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2022-11-25 15:30:40,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:40,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:40,711 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:40,713 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 2 states and 223 transitions. [2022-11-25 15:30:40,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2022-11-25 15:30:40,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:30:40,717 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 36 flow [2022-11-25 15:30:40,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-11-25 15:30:40,724 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-11-25 15:30:40,724 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 36 flow [2022-11-25 15:30:40,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:40,759 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:40,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:30:40,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:30:40,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:40,763 INFO L85 PathProgramCache]: Analyzing trace with hash 411484, now seen corresponding path program 1 times [2022-11-25 15:30:40,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:40,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553470258] [2022-11-25 15:30:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:40,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:40,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:40,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553470258] [2022-11-25 15:30:40,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553470258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:30:40,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:30:40,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:30:40,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001786622] [2022-11-25 15:30:40,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:30:40,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:30:40,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:30:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:30:41,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-11-25 15:30:41,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:41,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-11-25 15:30:41,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:41,072 INFO L130 PetriNetUnfolder]: 82/128 cut-off events. [2022-11-25 15:30:41,072 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:30:41,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 128 events. 82/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 277 event pairs, 34 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 264. Up to 101 conditions per place. [2022-11-25 15:30:41,081 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-11-25 15:30:41,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 88 flow [2022-11-25 15:30:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:30:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:30:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2022-11-25 15:30:41,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46607669616519176 [2022-11-25 15:30:41,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2022-11-25 15:30:41,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2022-11-25 15:30:41,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:41,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2022-11-25 15:30:41,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,096 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 36 flow. Second operand 3 states and 316 transitions. [2022-11-25 15:30:41,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 88 flow [2022-11-25 15:30:41,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:30:41,097 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2022-11-25 15:30:41,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-11-25 15:30:41,098 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-11-25 15:30:41,098 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2022-11-25 15:30:41,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:41,099 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:30:41,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:30:41,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:41,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:41,103 INFO L85 PathProgramCache]: Analyzing trace with hash 411485, now seen corresponding path program 1 times [2022-11-25 15:30:41,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:41,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123664916] [2022-11-25 15:30:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:41,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:41,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:41,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123664916] [2022-11-25 15:30:41,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123664916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:30:41,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:30:41,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:30:41,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688753660] [2022-11-25 15:30:41,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:30:41,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:30:41,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:30:41,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:30:41,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 226 [2022-11-25 15:30:41,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:41,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 226 [2022-11-25 15:30:41,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:41,338 INFO L130 PetriNetUnfolder]: 79/122 cut-off events. [2022-11-25 15:30:41,338 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:30:41,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 122 events. 79/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 264 event pairs, 32 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 262. Up to 95 conditions per place. [2022-11-25 15:30:41,340 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2022-11-25 15:30:41,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 88 flow [2022-11-25 15:30:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:30:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:30:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2022-11-25 15:30:41,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45132743362831856 [2022-11-25 15:30:41,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2022-11-25 15:30:41,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2022-11-25 15:30:41,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:41,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2022-11-25 15:30:41,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,347 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 38 flow. Second operand 3 states and 306 transitions. [2022-11-25 15:30:41,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 88 flow [2022-11-25 15:30:41,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:30:41,348 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 36 flow [2022-11-25 15:30:41,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-11-25 15:30:41,350 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2022-11-25 15:30:41,351 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 36 flow [2022-11-25 15:30:41,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:41,351 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:30:41,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:30:41,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash -626046303, now seen corresponding path program 1 times [2022-11-25 15:30:41,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:41,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212563407] [2022-11-25 15:30:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:41,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:41,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:41,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212563407] [2022-11-25 15:30:41,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212563407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:30:41,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:30:41,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:30:41,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617459355] [2022-11-25 15:30:41,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:30:41,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:30:41,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:41,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:30:41,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:30:41,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-11-25 15:30:41,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:41,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-11-25 15:30:41,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:41,547 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-11-25 15:30:41,547 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:30:41,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 149 events. 97/149 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 332 event pairs, 20 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 316. Up to 91 conditions per place. [2022-11-25 15:30:41,549 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-11-25 15:30:41,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 92 flow [2022-11-25 15:30:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:30:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:30:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-11-25 15:30:41,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46755162241887904 [2022-11-25 15:30:41,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-11-25 15:30:41,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-11-25 15:30:41,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:41,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-11-25 15:30:41,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,555 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 36 flow. Second operand 3 states and 317 transitions. [2022-11-25 15:30:41,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 92 flow [2022-11-25 15:30:41,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:30:41,557 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 46 flow [2022-11-25 15:30:41,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-11-25 15:30:41,559 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-11-25 15:30:41,560 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 46 flow [2022-11-25 15:30:41,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:41,560 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:41,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:30:41,561 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:41,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2067401261, now seen corresponding path program 1 times [2022-11-25 15:30:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:41,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096135259] [2022-11-25 15:30:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:41,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:41,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:41,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096135259] [2022-11-25 15:30:41,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096135259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:41,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903013167] [2022-11-25 15:30:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:41,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:41,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:41,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:41,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:30:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:41,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:30:41,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:41,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:41,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903013167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:30:41,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:30:41,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:30:41,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797963266] [2022-11-25 15:30:41,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:41,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:30:41,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:41,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:30:41,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:30:41,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-11-25 15:30:41,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 46 flow. Second operand has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:41,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:41,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-11-25 15:30:41,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:41,992 INFO L130 PetriNetUnfolder]: 151/230 cut-off events. [2022-11-25 15:30:41,992 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:30:41,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 230 events. 151/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 529 event pairs, 20 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 541. Up to 91 conditions per place. [2022-11-25 15:30:41,994 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-11-25 15:30:41,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 190 flow [2022-11-25 15:30:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:30:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:30:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2022-11-25 15:30:41,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646017699115044 [2022-11-25 15:30:41,997 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2022-11-25 15:30:41,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2022-11-25 15:30:41,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:41,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2022-11-25 15:30:41,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:42,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:42,002 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:42,003 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 46 flow. Second operand 6 states and 630 transitions. [2022-11-25 15:30:42,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 190 flow [2022-11-25 15:30:42,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:30:42,004 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 86 flow [2022-11-25 15:30:42,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2022-11-25 15:30:42,005 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-11-25 15:30:42,005 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 86 flow [2022-11-25 15:30:42,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:42,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:42,006 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:42,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:30:42,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:42,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash 119868329, now seen corresponding path program 2 times [2022-11-25 15:30:42,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:42,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370301356] [2022-11-25 15:30:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:42,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:42,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370301356] [2022-11-25 15:30:42,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370301356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481657296] [2022-11-25 15:30:42,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:30:42,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:42,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:42,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:42,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:30:42,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:30:42,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:30:42,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:30:42,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:30:42,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:30:42,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481657296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:30:42,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:30:42,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-11-25 15:30:42,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256330835] [2022-11-25 15:30:42,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:30:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:30:42,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:42,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:30:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:30:42,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-11-25 15:30:42,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:42,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:42,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-11-25 15:30:42,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:42,697 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-11-25 15:30:42,697 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-25 15:30:42,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 203 events. 133/203 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 445 event pairs, 80 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 569. Up to 203 conditions per place. [2022-11-25 15:30:42,699 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-25 15:30:42,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 110 flow [2022-11-25 15:30:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:30:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:30:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2022-11-25 15:30:42,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277286135693215 [2022-11-25 15:30:42,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2022-11-25 15:30:42,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2022-11-25 15:30:42,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:42,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2022-11-25 15:30:42,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:42,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:42,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:42,705 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 86 flow. Second operand 3 states and 290 transitions. [2022-11-25 15:30:42,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 110 flow [2022-11-25 15:30:42,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 96 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 15:30:42,707 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 64 flow [2022-11-25 15:30:42,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2022-11-25 15:30:42,708 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-11-25 15:30:42,709 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 64 flow [2022-11-25 15:30:42,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:42,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:42,709 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:42,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:30:42,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 15:30:42,915 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash 119868321, now seen corresponding path program 1 times [2022-11-25 15:30:42,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:42,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351770531] [2022-11-25 15:30:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:42,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:43,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:43,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351770531] [2022-11-25 15:30:43,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351770531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:43,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322903316] [2022-11-25 15:30:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:43,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:43,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:43,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:43,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:30:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:43,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:30:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:43,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:43,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322903316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:30:43,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:30:43,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 15:30:43,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293239280] [2022-11-25 15:30:43,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:43,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:30:43,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:43,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:30:43,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:30:43,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-11-25 15:30:43,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 64 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:43,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:43,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-11-25 15:30:43,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:43,439 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-11-25 15:30:43,439 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-11-25 15:30:43,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 365 events. 241/365 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 844 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 947. Up to 82 conditions per place. [2022-11-25 15:30:43,442 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-11-25 15:30:43,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 83 transitions, 386 flow [2022-11-25 15:30:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:30:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:30:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1253 transitions. [2022-11-25 15:30:43,447 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46202064896755163 [2022-11-25 15:30:43,447 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1253 transitions. [2022-11-25 15:30:43,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1253 transitions. [2022-11-25 15:30:43,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:43,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1253 transitions. [2022-11-25 15:30:43,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:43,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:43,456 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:43,456 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 64 flow. Second operand 12 states and 1253 transitions. [2022-11-25 15:30:43,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 83 transitions, 386 flow [2022-11-25 15:30:43,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 83 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:30:43,462 INFO L231 Difference]: Finished difference. Result has 43 places, 23 transitions, 147 flow [2022-11-25 15:30:43,462 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=23} [2022-11-25 15:30:43,463 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2022-11-25 15:30:43,463 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 23 transitions, 147 flow [2022-11-25 15:30:43,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:43,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:43,464 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:43,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:30:43,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:30:43,670 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:43,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1519272671, now seen corresponding path program 2 times [2022-11-25 15:30:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:43,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365473868] [2022-11-25 15:30:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:43,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:43,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:43,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365473868] [2022-11-25 15:30:43,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365473868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:43,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289323030] [2022-11-25 15:30:43,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:30:43,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:43,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:43,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:43,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:30:44,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:30:44,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:30:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:30:44,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:44,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:44,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289323030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:30:44,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:30:44,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 15:30:44,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973903914] [2022-11-25 15:30:44,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:44,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:30:44,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:30:44,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:30:44,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-11-25 15:30:44,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 23 transitions, 147 flow. Second operand has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:44,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:44,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-11-25 15:30:44,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:44,721 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-11-25 15:30:44,721 INFO L131 PetriNetUnfolder]: For 4203/4203 co-relation queries the response was YES. [2022-11-25 15:30:44,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 689 events. 457/689 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1641 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2127. Up to 190 conditions per place. [2022-11-25 15:30:44,727 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-11-25 15:30:44,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 167 transitions, 841 flow [2022-11-25 15:30:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:30:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 15:30:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2507 transitions. [2022-11-25 15:30:44,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4622050147492625 [2022-11-25 15:30:44,734 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2507 transitions. [2022-11-25 15:30:44,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2507 transitions. [2022-11-25 15:30:44,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:44,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2507 transitions. [2022-11-25 15:30:44,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 104.45833333333333) internal successors, (2507), 24 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:44,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:44,750 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:44,751 INFO L175 Difference]: Start difference. First operand has 43 places, 23 transitions, 147 flow. Second operand 24 states and 2507 transitions. [2022-11-25 15:30:44,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 167 transitions, 841 flow [2022-11-25 15:30:44,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 167 transitions, 769 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-25 15:30:44,758 INFO L231 Difference]: Finished difference. Result has 73 places, 35 transitions, 267 flow [2022-11-25 15:30:44,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=35} [2022-11-25 15:30:44,759 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 50 predicate places. [2022-11-25 15:30:44,759 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 35 transitions, 267 flow [2022-11-25 15:30:44,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:30:44,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:44,761 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:44,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:30:44,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:44,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1646379041, now seen corresponding path program 3 times [2022-11-25 15:30:44,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:44,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502459687] [2022-11-25 15:30:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:44,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:45,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:45,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502459687] [2022-11-25 15:30:45,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502459687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:45,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605021520] [2022-11-25 15:30:45,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:30:45,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:45,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:45,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:45,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:30:45,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-25 15:30:45,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:30:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 15:30:45,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:45,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:46,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605021520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:30:46,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:30:46,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-11-25 15:30:46,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495059621] [2022-11-25 15:30:46,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:46,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 15:30:46,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:46,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 15:30:46,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:30:46,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-11-25 15:30:46,300 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) [2022-11-25 15:30:46,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:46,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-11-25 15:30:46,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:30:46,656 INFO L130 PetriNetUnfolder]: 493/743 cut-off events. [2022-11-25 15:30:46,656 INFO L131 PetriNetUnfolder]: For 5553/5553 co-relation queries the response was YES. [2022-11-25 15:30:46,659 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 1774 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. [2022-11-25 15:30:46,663 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 156 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2022-11-25 15:30:46,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 181 transitions, 933 flow [2022-11-25 15:30:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 15:30:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 15:30:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2705 transitions. [2022-11-25 15:30:46,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46034717494894484 [2022-11-25 15:30:46,670 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2705 transitions. [2022-11-25 15:30:46,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2705 transitions. [2022-11-25 15:30:46,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:30:46,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2705 transitions. [2022-11-25 15:30:46,678 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) [2022-11-25 15:30:46,687 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) [2022-11-25 15:30:46,689 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) [2022-11-25 15:30:46,689 INFO L175 Difference]: Start difference. First operand has 73 places, 35 transitions, 267 flow. Second operand 26 states and 2705 transitions. [2022-11-25 15:30:46,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 181 transitions, 933 flow [2022-11-25 15:30:46,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 181 transitions, 833 flow, removed 39 selfloop flow, removed 11 redundant places. [2022-11-25 15:30:46,703 INFO L231 Difference]: Finished difference. Result has 89 places, 37 transitions, 243 flow [2022-11-25 15:30:46,703 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} [2022-11-25 15:30:46,704 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 66 predicate places. [2022-11-25 15:30:46,704 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 37 transitions, 243 flow [2022-11-25 15:30:46,705 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) [2022-11-25 15:30:46,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:30:46,706 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:46,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:30:46,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:46,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:30:46,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:46,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1622298785, now seen corresponding path program 4 times [2022-11-25 15:30:46,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:46,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970836026] [2022-11-25 15:30:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:46,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:48,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:48,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970836026] [2022-11-25 15:30:48,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970836026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:48,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181977505] [2022-11-25 15:30:48,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:30:48,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:48,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:48,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:48,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:30:49,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:30:49,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:30:49,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 15:30:49,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:50,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:52,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181977505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:30:52,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:30:52,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-11-25 15:30:52,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476660011] [2022-11-25 15:30:52,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:52,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-25 15:30:52,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:52,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-25 15:30:52,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4795, Unknown=0, NotChecked=0, Total=5852 [2022-11-25 15:30:55,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-11-25 15:30:55,242 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) [2022-11-25 15:30:55,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:55,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-11-25 15:30:55,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:18,205 INFO L130 PetriNetUnfolder]: 88123/132204 cut-off events. [2022-11-25 15:32:18,205 INFO L131 PetriNetUnfolder]: For 744411/744411 co-relation queries the response was YES. [2022-11-25 15:32:18,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415880 conditions, 132204 events. 88123/132204 cut-off events. For 744411/744411 co-relation queries the response was YES. Maximal size of possible extension queue 2529. Compared 992210 event pairs, 102 based on Foata normal form. 209/99387 useless extension candidates. Maximal degree in co-relation 415851. Up to 27554 conditions per place. [2022-11-25 15:32:19,826 INFO L137 encePairwiseOnDemand]: 221/226 looper letters, 1759 selfloop transitions, 5877 changer transitions 0/7636 dead transitions. [2022-11-25 15:32:19,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 7636 transitions, 68096 flow [2022-11-25 15:32:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2022-11-25 15:32:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2022-11-25 15:32:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 35197 transitions. [2022-11-25 15:32:19,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.442440164923572 [2022-11-25 15:32:19,902 INFO L72 ComplementDD]: Start complementDD. Operand 352 states and 35197 transitions. [2022-11-25 15:32:19,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 352 states and 35197 transitions. [2022-11-25 15:32:19,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:19,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 352 states and 35197 transitions. [2022-11-25 15:32:20,007 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) [2022-11-25 15:32:20,115 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) [2022-11-25 15:32:20,139 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) [2022-11-25 15:32:20,139 INFO L175 Difference]: Start difference. First operand has 89 places, 37 transitions, 243 flow. Second operand 352 states and 35197 transitions. [2022-11-25 15:32:20,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 7636 transitions, 68096 flow [2022-11-25 15:32:31,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 7636 transitions, 55190 flow, removed 2193 selfloop flow, removed 23 redundant places. [2022-11-25 15:32:31,946 INFO L231 Difference]: Finished difference. Result has 445 places, 5914 transitions, 35640 flow [2022-11-25 15:32:31,946 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=35640, PETRI_PLACES=445, PETRI_TRANSITIONS=5914} [2022-11-25 15:32:31,947 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2022-11-25 15:32:31,947 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 5914 transitions, 35640 flow [2022-11-25 15:32:31,949 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) [2022-11-25 15:32:31,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:31,950 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:31,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:32,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 15:32:32,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 15:32:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:32,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2111360791, now seen corresponding path program 1 times [2022-11-25 15:32:32,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:32,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468832278] [2022-11-25 15:32:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:32,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:34,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:34,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468832278] [2022-11-25 15:32:34,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468832278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:34,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309152085] [2022-11-25 15:32:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:34,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:34,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:34,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:34,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329abd5b-52f7-466e-9294-d6c787d0503c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:32:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:34,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-25 15:32:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 211 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:36,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:38,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309152085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:38,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:38,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-11-25 15:32:38,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079322182] [2022-11-25 15:32:38,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-25 15:32:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:38,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-25 15:32:38,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=5699, Unknown=0, NotChecked=0, Total=6806 [2022-11-25 15:32:41,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-11-25 15:32:41,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 5914 transitions, 35640 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) [2022-11-25 15:32:41,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:41,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-11-25 15:32:41,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand