./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:38:04,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:38:04,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:38:04,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:38:04,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:38:04,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:38:04,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:38:04,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:38:04,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:38:04,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:38:04,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:38:04,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:38:04,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:38:04,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:38:04,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:38:04,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:38:04,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:38:04,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:38:04,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:38:04,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:38:04,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:38:04,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:38:04,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:38:04,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:38:04,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:38:04,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:38:04,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:38:04,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:38:04,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:38:04,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:38:04,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:38:04,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:38:04,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:38:04,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:38:04,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:38:04,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:38:04,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:38:04,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:38:04,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:38:04,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:38:04,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:38:04,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:38:04,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:38:04,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:38:04,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:38:04,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:38:04,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:38:04,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:38:04,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:38:04,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:38:04,616 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:38:04,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:38:04,617 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:38:04,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:38:04,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:38:04,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:38:04,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:38:04,617 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:38:04,618 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:38:04,618 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:38:04,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:38:04,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:38:04,618 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:38:04,618 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:38:04,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:38:04,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:38:04,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:38:04,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:38:04,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:38:04,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:38:04,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:38:04,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:38:04,620 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:38:04,620 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:38:04,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:38:04,620 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:38:04,620 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_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 [2022-12-13 17:38:04,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:38:04,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:38:04,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:38:04,842 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:38:04,843 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:38:04,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/fib_safe-11.i [2022-12-13 17:38:07,385 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:38:07,605 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:38:07,605 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/sv-benchmarks/c/pthread/fib_safe-11.i [2022-12-13 17:38:07,616 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/data/d751ec15f/9bc4847a02bc4324acfc2b979ec003a6/FLAG988ec5aa7 [2022-12-13 17:38:07,956 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/data/d751ec15f/9bc4847a02bc4324acfc2b979ec003a6 [2022-12-13 17:38:07,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:38:07,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:38:07,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:38:07,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:38:07,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:38:07,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:38:07" (1/1) ... [2022-12-13 17:38:07,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c17cf4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:07, skipping insertion in model container [2022-12-13 17:38:07,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:38:07" (1/1) ... [2022-12-13 17:38:07,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:38:07,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:38:08,176 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_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-12-13 17:38:08,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,184 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,186 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,190 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,190 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,190 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,190 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,193 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,194 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:38:08,202 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:38:08,230 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_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-12-13 17:38:08,232 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,232 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,233 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,233 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,236 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,237 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,237 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,237 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,239 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:38:08,240 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:38:08,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:38:08,263 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:38:08,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08 WrapperNode [2022-12-13 17:38:08,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:38:08,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:38:08,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:38:08,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:38:08,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,298 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 17:38:08,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:38:08,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:38:08,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:38:08,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:38:08,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:38:08,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:38:08,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:38:08,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:38:08,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (1/1) ... [2022-12-13 17:38:08,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:38:08,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:38:08,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:38:08,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:38:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 17:38:08,379 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 17:38:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 17:38:08,379 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 17:38:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:38:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 17:38:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:38:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:38:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:38:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:38:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 17:38:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:38:08,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:38:08,381 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:38:08,471 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:38:08,473 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:38:08,620 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:38:08,625 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:38:08,625 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 17:38:08,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:38:08 BoogieIcfgContainer [2022-12-13 17:38:08,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:38:08,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:38:08,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:38:08,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:38:08,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:38:07" (1/3) ... [2022-12-13 17:38:08,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b100156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:38:08, skipping insertion in model container [2022-12-13 17:38:08,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:38:08" (2/3) ... [2022-12-13 17:38:08,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b100156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:38:08, skipping insertion in model container [2022-12-13 17:38:08,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:38:08" (3/3) ... [2022-12-13 17:38:08,633 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2022-12-13 17:38:08,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:38:08,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-13 17:38:08,648 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:38:08,688 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:38:08,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-12-13 17:38:08,765 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-12-13 17:38:08,765 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:38:08,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-12-13 17:38:08,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 109 transitions, 228 flow [2022-12-13 17:38:08,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 220 flow [2022-12-13 17:38:08,775 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:38:08,783 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 107 transitions, 220 flow [2022-12-13 17:38:08,785 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 107 transitions, 220 flow [2022-12-13 17:38:08,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 220 flow [2022-12-13 17:38:08,805 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-12-13 17:38:08,805 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:38:08,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-12-13 17:38:08,808 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-12-13 17:38:11,833 INFO L134 LiptonReduction]: Checked pairs total: 1725 [2022-12-13 17:38:11,833 INFO L136 LiptonReduction]: Total number of compositions: 117 [2022-12-13 17:38:11,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:38:11,848 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;@78677ab0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:38:11,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 17:38:11,849 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 17:38:11,849 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:38:11,849 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:11,850 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 17:38:11,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash 421, now seen corresponding path program 1 times [2022-12-13 17:38:11,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:11,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780959615] [2022-12-13 17:38:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:11,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:11,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780959615] [2022-12-13 17:38:11,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780959615] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:38:11,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:38:11,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 17:38:11,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98680199] [2022-12-13 17:38:11,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:38:11,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:38:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:38:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:38:11,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 226 [2022-12-13 17:38:11,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:11,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:11,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 226 [2022-12-13 17:38:11,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:12,013 INFO L130 PetriNetUnfolder]: 103/161 cut-off events. [2022-12-13 17:38:12,014 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:38:12,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 161 events. 103/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 401 event pairs, 60 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 324. Up to 162 conditions per place. [2022-12-13 17:38:12,015 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2022-12-13 17:38:12,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2022-12-13 17:38:12,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 17:38:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 17:38:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2022-12-13 17:38:12,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49336283185840707 [2022-12-13 17:38:12,026 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2022-12-13 17:38:12,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2022-12-13 17:38:12,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:12,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2022-12-13 17:38:12,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,034 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,036 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 2 states and 223 transitions. [2022-12-13 17:38:12,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2022-12-13 17:38:12,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:38:12,039 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 36 flow [2022-12-13 17:38:12,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-12-13 17:38:12,043 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 17:38:12,043 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 36 flow [2022-12-13 17:38:12,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:12,043 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:38:12,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:38:12,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash 411490, now seen corresponding path program 1 times [2022-12-13 17:38:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903234528] [2022-12-13 17:38:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:12,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:12,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903234528] [2022-12-13 17:38:12,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903234528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:38:12,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:38:12,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:38:12,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528686176] [2022-12-13 17:38:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:38:12,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:38:12,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:12,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:38:12,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:38:12,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 226 [2022-12-13 17:38:12,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:12,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 226 [2022-12-13 17:38:12,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:12,212 INFO L130 PetriNetUnfolder]: 82/128 cut-off events. [2022-12-13 17:38:12,212 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:38:12,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 128 events. 82/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 285 event pairs, 34 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 264. Up to 101 conditions per place. [2022-12-13 17:38:12,213 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-12-13 17:38:12,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 88 flow [2022-12-13 17:38:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:38:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:38:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2022-12-13 17:38:12,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4528023598820059 [2022-12-13 17:38:12,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2022-12-13 17:38:12,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2022-12-13 17:38:12,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:12,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2022-12-13 17:38:12,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,218 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 36 flow. Second operand 3 states and 307 transitions. [2022-12-13 17:38:12,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 88 flow [2022-12-13 17:38:12,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:38:12,219 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2022-12-13 17:38:12,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-12-13 17:38:12,220 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 17:38:12,220 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2022-12-13 17:38:12,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:12,220 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:38:12,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:38:12,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash 411488, now seen corresponding path program 1 times [2022-12-13 17:38:12,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:12,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166593013] [2022-12-13 17:38:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:12,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:12,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166593013] [2022-12-13 17:38:12,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166593013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:38:12,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:38:12,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:38:12,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682924268] [2022-12-13 17:38:12,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:38:12,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:38:12,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:38:12,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:38:12,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-12-13 17:38:12,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:12,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-12-13 17:38:12,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:12,371 INFO L130 PetriNetUnfolder]: 79/122 cut-off events. [2022-12-13 17:38:12,371 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:38:12,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 122 events. 79/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 259 event pairs, 32 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 262. Up to 95 conditions per place. [2022-12-13 17:38:12,372 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2022-12-13 17:38:12,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 88 flow [2022-12-13 17:38:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:38:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:38:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2022-12-13 17:38:12,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646017699115044 [2022-12-13 17:38:12,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2022-12-13 17:38:12,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2022-12-13 17:38:12,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:12,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2022-12-13 17:38:12,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,376 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 38 flow. Second operand 3 states and 315 transitions. [2022-12-13 17:38:12,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 88 flow [2022-12-13 17:38:12,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:38:12,376 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 36 flow [2022-12-13 17:38:12,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-12-13 17:38:12,377 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2022-12-13 17:38:12,377 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 36 flow [2022-12-13 17:38:12,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:12,377 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:38:12,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:38:12,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash -625957232, now seen corresponding path program 1 times [2022-12-13 17:38:12,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:12,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359692689] [2022-12-13 17:38:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:12,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:12,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:12,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359692689] [2022-12-13 17:38:12,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359692689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:38:12,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:38:12,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:38:12,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199738886] [2022-12-13 17:38:12,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:38:12,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:38:12,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:12,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:38:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:38:12,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-12-13 17:38:12,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:12,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-12-13 17:38:12,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:12,471 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-13 17:38:12,471 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:38:12,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 149 events. 97/149 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 20 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 316. Up to 91 conditions per place. [2022-12-13 17:38:12,472 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-12-13 17:38:12,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 92 flow [2022-12-13 17:38:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:38:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:38:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-12-13 17:38:12,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46755162241887904 [2022-12-13 17:38:12,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-12-13 17:38:12,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-12-13 17:38:12,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:12,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-12-13 17:38:12,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,476 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 36 flow. Second operand 3 states and 317 transitions. [2022-12-13 17:38:12,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 92 flow [2022-12-13 17:38:12,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:38:12,477 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 46 flow [2022-12-13 17:38:12,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-12-13 17:38:12,477 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 17:38:12,477 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 46 flow [2022-12-13 17:38:12,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:12,478 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:12,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:38:12,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:12,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2070162338, now seen corresponding path program 1 times [2022-12-13 17:38:12,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:12,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232484787] [2022-12-13 17:38:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:12,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:12,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:12,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232484787] [2022-12-13 17:38:12,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232484787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:38:12,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025305024] [2022-12-13 17:38:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:12,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:12,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:38:12,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:38:12,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:38:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:12,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:38:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:38:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:12,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:38:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:12,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025305024] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:38:12,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:38:12,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 17:38:12,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937143614] [2022-12-13 17:38:12,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:38:12,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:38:12,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:12,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:38:12,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:38:12,644 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 17:38:12,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 46 flow. Second operand has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:12,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 17:38:12,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:12,729 INFO L130 PetriNetUnfolder]: 151/230 cut-off events. [2022-12-13 17:38:12,729 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:38:12,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 230 events. 151/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 526 event pairs, 20 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 541. Up to 91 conditions per place. [2022-12-13 17:38:12,732 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-12-13 17:38:12,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 190 flow [2022-12-13 17:38:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:38:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:38:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2022-12-13 17:38:12,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646017699115044 [2022-12-13 17:38:12,734 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2022-12-13 17:38:12,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2022-12-13 17:38:12,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:12,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2022-12-13 17:38:12,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,740 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,740 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 46 flow. Second operand 6 states and 630 transitions. [2022-12-13 17:38:12,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 190 flow [2022-12-13 17:38:12,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:38:12,742 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 86 flow [2022-12-13 17:38:12,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2022-12-13 17:38:12,742 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-12-13 17:38:12,743 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 86 flow [2022-12-13 17:38:12,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:12,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:12,743 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:12,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:38:12,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:12,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:12,950 INFO L85 PathProgramCache]: Analyzing trace with hash 770857744, now seen corresponding path program 2 times [2022-12-13 17:38:12,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:12,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437822310] [2022-12-13 17:38:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:12,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:13,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437822310] [2022-12-13 17:38:13,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437822310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:38:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872103026] [2022-12-13 17:38:13,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:38:13,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:38:13,109 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:38:13,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:38:13,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:38:13,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:38:13,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:38:13,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:38:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:38:13,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:38:13,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872103026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:38:13,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:38:13,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-12-13 17:38:13,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983978280] [2022-12-13 17:38:13,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:38:13,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:38:13,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:13,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:38:13,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:38:13,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 17:38:13,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:13,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:13,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 17:38:13,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:13,345 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-13 17:38:13,346 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-12-13 17:38:13,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 203 events. 133/203 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 444 event pairs, 80 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 569. Up to 203 conditions per place. [2022-12-13 17:38:13,347 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-12-13 17:38:13,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 110 flow [2022-12-13 17:38:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:38:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:38:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2022-12-13 17:38:13,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277286135693215 [2022-12-13 17:38:13,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2022-12-13 17:38:13,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2022-12-13 17:38:13,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:13,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2022-12-13 17:38:13,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:13,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:13,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:13,353 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 86 flow. Second operand 3 states and 290 transitions. [2022-12-13 17:38:13,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 110 flow [2022-12-13 17:38:13,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 96 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 17:38:13,355 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 64 flow [2022-12-13 17:38:13,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2022-12-13 17:38:13,355 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-12-13 17:38:13,356 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 64 flow [2022-12-13 17:38:13,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:13,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:13,356 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:13,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:38:13,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:13,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:13,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:13,559 INFO L85 PathProgramCache]: Analyzing trace with hash 770857736, now seen corresponding path program 1 times [2022-12-13 17:38:13,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:13,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012005407] [2022-12-13 17:38:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:13,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012005407] [2022-12-13 17:38:13,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012005407] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:38:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453051608] [2022-12-13 17:38:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:13,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:38:13,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:38:13,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:38:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:38:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:38:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:13,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:38:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:13,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453051608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:38:13,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:38:13,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 17:38:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319841289] [2022-12-13 17:38:13,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:38:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:38:13,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:38:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:38:13,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 17:38:13,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 64 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:13,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:13,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 17:38:13,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:14,000 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-13 17:38:14,000 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-12-13 17:38:14,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 365 events. 241/365 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 843 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 947. Up to 82 conditions per place. [2022-12-13 17:38:14,004 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-13 17:38:14,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 83 transitions, 386 flow [2022-12-13 17:38:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:38:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:38:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1253 transitions. [2022-12-13 17:38:14,006 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46202064896755163 [2022-12-13 17:38:14,007 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1253 transitions. [2022-12-13 17:38:14,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1253 transitions. [2022-12-13 17:38:14,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:14,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1253 transitions. [2022-12-13 17:38:14,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:14,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:14,012 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:14,012 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 64 flow. Second operand 12 states and 1253 transitions. [2022-12-13 17:38:14,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 83 transitions, 386 flow [2022-12-13 17:38:14,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 83 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:38:14,014 INFO L231 Difference]: Finished difference. Result has 43 places, 23 transitions, 147 flow [2022-12-13 17:38:14,014 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=23} [2022-12-13 17:38:14,014 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2022-12-13 17:38:14,014 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 23 transitions, 147 flow [2022-12-13 17:38:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:14,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:14,015 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:14,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:38:14,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:14,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash -300928568, now seen corresponding path program 2 times [2022-12-13 17:38:14,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:14,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928309388] [2022-12-13 17:38:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:14,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:14,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:14,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928309388] [2022-12-13 17:38:14,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928309388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:38:14,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546670130] [2022-12-13 17:38:14,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:38:14,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:38:14,348 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:38:14,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:38:14,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:38:14,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:38:14,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:38:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:38:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:14,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:38:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:14,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546670130] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:38:14,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:38:14,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 17:38:14,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34808662] [2022-12-13 17:38:14,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:38:14,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:38:14,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:14,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:38:14,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:38:14,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 17:38:14,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 23 transitions, 147 flow. Second operand has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:14,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:14,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 17:38:14,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:14,899 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-12-13 17:38:14,899 INFO L131 PetriNetUnfolder]: For 4203/4203 co-relation queries the response was YES. [2022-12-13 17:38:14,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 689 events. 457/689 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1641 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2127. Up to 190 conditions per place. [2022-12-13 17:38:14,904 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-12-13 17:38:14,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 167 transitions, 841 flow [2022-12-13 17:38:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 17:38:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 17:38:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2507 transitions. [2022-12-13 17:38:14,911 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4622050147492625 [2022-12-13 17:38:14,911 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2507 transitions. [2022-12-13 17:38:14,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2507 transitions. [2022-12-13 17:38:14,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:14,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2507 transitions. [2022-12-13 17:38:14,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 104.45833333333333) internal successors, (2507), 24 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:14,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:14,928 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:14,928 INFO L175 Difference]: Start difference. First operand has 43 places, 23 transitions, 147 flow. Second operand 24 states and 2507 transitions. [2022-12-13 17:38:14,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 167 transitions, 841 flow [2022-12-13 17:38:14,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 167 transitions, 769 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-12-13 17:38:14,936 INFO L231 Difference]: Finished difference. Result has 73 places, 35 transitions, 267 flow [2022-12-13 17:38:14,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=35} [2022-12-13 17:38:14,937 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 50 predicate places. [2022-12-13 17:38:14,937 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 35 transitions, 267 flow [2022-12-13 17:38:14,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.2) internal successors, (2455), 25 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:14,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:14,938 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:14,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:38:15,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:15,139 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1827909448, now seen corresponding path program 3 times [2022-12-13 17:38:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:15,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475232933] [2022-12-13 17:38:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:15,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:15,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:15,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475232933] [2022-12-13 17:38:15,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475232933] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:38:15,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41347148] [2022-12-13 17:38:15,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:38:15,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:15,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:38:15,458 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:38:15,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:38:15,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-13 17:38:15,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:38:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:38:15,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:38:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:15,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:38:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:15,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41347148] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:38:15,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:38:15,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-12-13 17:38:15,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329069176] [2022-12-13 17:38:15,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:38:15,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 17:38:15,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 17:38:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 17:38:15,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 17:38:15,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 35 transitions, 267 flow. Second operand has 27 states, 27 states have (on average 98.22222222222223) internal successors, (2652), 27 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:15,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:15,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 17:38:15,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:16,126 INFO L130 PetriNetUnfolder]: 493/743 cut-off events. [2022-12-13 17:38:16,127 INFO L131 PetriNetUnfolder]: For 5553/5553 co-relation queries the response was YES. [2022-12-13 17:38:16,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2424 conditions, 743 events. 493/743 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1773 event pairs, 20 based on Foata normal form. 18/597 useless extension candidates. Maximal degree in co-relation 2397. Up to 166 conditions per place. [2022-12-13 17:38:16,130 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 156 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2022-12-13 17:38:16,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 181 transitions, 933 flow [2022-12-13 17:38:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 17:38:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 17:38:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2705 transitions. [2022-12-13 17:38:16,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46034717494894484 [2022-12-13 17:38:16,134 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2705 transitions. [2022-12-13 17:38:16,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2705 transitions. [2022-12-13 17:38:16,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:16,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2705 transitions. [2022-12-13 17:38:16,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 104.03846153846153) internal successors, (2705), 26 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:16,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 226.0) internal successors, (6102), 27 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:16,143 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 226.0) internal successors, (6102), 27 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:16,143 INFO L175 Difference]: Start difference. First operand has 73 places, 35 transitions, 267 flow. Second operand 26 states and 2705 transitions. [2022-12-13 17:38:16,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 181 transitions, 933 flow [2022-12-13 17:38:16,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 181 transitions, 833 flow, removed 39 selfloop flow, removed 11 redundant places. [2022-12-13 17:38:16,152 INFO L231 Difference]: Finished difference. Result has 89 places, 37 transitions, 243 flow [2022-12-13 17:38:16,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=243, PETRI_PLACES=89, PETRI_TRANSITIONS=37} [2022-12-13 17:38:16,152 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 66 predicate places. [2022-12-13 17:38:16,152 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 37 transitions, 243 flow [2022-12-13 17:38:16,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 98.22222222222223) internal successors, (2652), 27 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:16,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:16,153 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:16,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 17:38:16,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:16,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:38:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash -20635256, now seen corresponding path program 4 times [2022-12-13 17:38:16,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:16,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721752181] [2022-12-13 17:38:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:16,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:17,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:17,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721752181] [2022-12-13 17:38:17,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721752181] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:38:17,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982922508] [2022-12-13 17:38:17,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:38:17,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:17,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:38:17,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:38:17,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:38:17,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:38:17,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:38:17,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-13 17:38:17,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:38:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:18,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:38:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:19,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982922508] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:38:19,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:38:19,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-13 17:38:19,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483947336] [2022-12-13 17:38:19,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:38:19,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 17:38:19,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 17:38:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4795, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 17:38:21,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 17:38:21,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 37 transitions, 243 flow. Second operand has 77 states, 77 states have (on average 93.16883116883118) internal successors, (7174), 77 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:38:21,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:21,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 17:38:21,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:39:19,077 INFO L130 PetriNetUnfolder]: 88123/132204 cut-off events. [2022-12-13 17:39:19,078 INFO L131 PetriNetUnfolder]: For 743978/743978 co-relation queries the response was YES. [2022-12-13 17:39:19,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415880 conditions, 132204 events. 88123/132204 cut-off events. For 743978/743978 co-relation queries the response was YES. Maximal size of possible extension queue 2529. Compared 989037 event pairs, 106 based on Foata normal form. 209/99387 useless extension candidates. Maximal degree in co-relation 415851. Up to 27554 conditions per place. [2022-12-13 17:39:20,207 INFO L137 encePairwiseOnDemand]: 221/226 looper letters, 1759 selfloop transitions, 5877 changer transitions 0/7636 dead transitions. [2022-12-13 17:39:20,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 7636 transitions, 68096 flow [2022-12-13 17:39:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2022-12-13 17:39:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2022-12-13 17:39:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 35197 transitions. [2022-12-13 17:39:20,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.442440164923572 [2022-12-13 17:39:20,235 INFO L72 ComplementDD]: Start complementDD. Operand 352 states and 35197 transitions. [2022-12-13 17:39:20,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 352 states and 35197 transitions. [2022-12-13 17:39:20,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:39:20,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 352 states and 35197 transitions. [2022-12-13 17:39:20,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 353 states, 352 states have (on average 99.99147727272727) internal successors, (35197), 352 states have internal predecessors, (35197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:39:20,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 353 states, 353 states have (on average 226.0) internal successors, (79778), 353 states have internal predecessors, (79778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:39:20,373 INFO L81 ComplementDD]: Finished complementDD. Result has 353 states, 353 states have (on average 226.0) internal successors, (79778), 353 states have internal predecessors, (79778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:39:20,373 INFO L175 Difference]: Start difference. First operand has 89 places, 37 transitions, 243 flow. Second operand 352 states and 35197 transitions. [2022-12-13 17:39:20,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 7636 transitions, 68096 flow [2022-12-13 17:39:29,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 7636 transitions, 55190 flow, removed 2193 selfloop flow, removed 23 redundant places. [2022-12-13 17:39:29,411 INFO L231 Difference]: Finished difference. Result has 445 places, 5914 transitions, 35640 flow [2022-12-13 17:39:29,411 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} [2022-12-13 17:39:29,412 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2022-12-13 17:39:29,412 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 5914 transitions, 35640 flow [2022-12-13 17:39:29,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 93.16883116883118) internal successors, (7174), 77 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:39:29,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:39:29,413 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:39:29,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 17:39:29,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 17:39:29,614 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 17:39:29,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:39:29,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2020924066, now seen corresponding path program 1 times [2022-12-13 17:39:29,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:39:29,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818675537] [2022-12-13 17:39:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:39:29,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:39:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:39:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:39:31,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:39:31,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818675537] [2022-12-13 17:39:31,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818675537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:39:31,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368388271] [2022-12-13 17:39:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:39:31,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:39:31,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:39:31,179 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:39:31,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ca0e1-6a80-464f-b99e-e163fa6f08e7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:39:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:39:31,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-13 17:39:31,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:39:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 211 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:39:32,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:39:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:39:34,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368388271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:39:34,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:39:34,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-13 17:39:34,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746384412] [2022-12-13 17:39:34,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:39:34,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 17:39:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:39:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 17:39:34,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=5699, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 17:39:35,804 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 17:39:35,808 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) [2022-12-13 17:39:35,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:39:35,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 17:39:35,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand