./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:18:53,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:18:53,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:18:53,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:18:53,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:18:53,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:18:53,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:18:53,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:18:53,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:18:53,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:18:53,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:18:53,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:18:53,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:18:53,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:18:53,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:18:53,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:18:53,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:18:53,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:18:53,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:18:53,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:18:53,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:18:53,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:18:53,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:18:53,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:18:53,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:18:53,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:18:53,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:18:53,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:18:53,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:18:53,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:18:53,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:18:53,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:18:53,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:18:53,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:18:53,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:18:53,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:18:53,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:18:53,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:18:53,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:18:53,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:18:53,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:18:53,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:18:53,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:18:53,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:18:53,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:18:53,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:18:53,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:18:53,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:18:53,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:18:53,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:18:53,541 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:18:53,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:18:53,542 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:18:53,542 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:18:53,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:18:53,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:18:53,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:18:53,543 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:18:53,543 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:18:53,543 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:18:53,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:18:53,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:18:53,544 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:18:53,544 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:18:53,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:18:53,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:18:53,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:18:53,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:18:53,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:18:53,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:18:53,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:18:53,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:18:53,546 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:18:53,546 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:18:53,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:18:53,547 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_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-11-25 18:18:53,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:18:53,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:18:53,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:18:53,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:18:53,824 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:18:53,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-25 18:18:56,965 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:18:57,160 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:18:57,161 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-25 18:18:57,168 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/data/bc1002218/9d9a233ad2af420c96ec8443e5731966/FLAG1d0bd4293 [2022-11-25 18:18:57,183 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/data/bc1002218/9d9a233ad2af420c96ec8443e5731966 [2022-11-25 18:18:57,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:18:57,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:18:57,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:18:57,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:18:57,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:18:57,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4458635b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57, skipping insertion in model container [2022-11-25 18:18:57,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:18:57,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:18:57,397 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:18:57,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:18:57,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:18:57,405 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:18:57,413 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_6a5f75ee-227f-4993-a480-7624a363e55b/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-25 18:18:57,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:18:57,430 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:18:57,447 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:18:57,447 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:18:57,449 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:18:57,450 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:18:57,454 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_6a5f75ee-227f-4993-a480-7624a363e55b/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-25 18:18:57,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:18:57,471 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:18:57,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57 WrapperNode [2022-11-25 18:18:57,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:18:57,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:18:57,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:18:57,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:18:57,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,520 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-11-25 18:18:57,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:18:57,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:18:57,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:18:57,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:18:57,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,547 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:18:57,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:18:57,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:18:57,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:18:57,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (1/1) ... [2022-11-25 18:18:57,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:18:57,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:18:57,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:18:57,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:18:57,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:18:57,627 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:18:57,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:18:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:18:57,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:18:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:18:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:18:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:18:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:18:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:18:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:18:57,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:18:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:18:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:18:57,631 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:18:57,734 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:18:57,736 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:18:58,035 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:18:58,105 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:18:58,119 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:18:58,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:18:58 BoogieIcfgContainer [2022-11-25 18:18:58,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:18:58,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:18:58,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:18:58,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:18:58,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:18:57" (1/3) ... [2022-11-25 18:18:58,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e516608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:18:58, skipping insertion in model container [2022-11-25 18:18:58,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:57" (2/3) ... [2022-11-25 18:18:58,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e516608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:18:58, skipping insertion in model container [2022-11-25 18:18:58,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:18:58" (3/3) ... [2022-11-25 18:18:58,132 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-11-25 18:18:58,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:18:58,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 18:18:58,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:18:58,264 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:18:58,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 214 flow [2022-11-25 18:18:58,422 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2022-11-25 18:18:58,422 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:18:58,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2022-11-25 18:18:58,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 99 transitions, 214 flow [2022-11-25 18:18:58,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 196 flow [2022-11-25 18:18:58,439 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:18:58,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 92 transitions, 196 flow [2022-11-25 18:18:58,475 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 92 transitions, 196 flow [2022-11-25 18:18:58,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 196 flow [2022-11-25 18:18:58,529 INFO L130 PetriNetUnfolder]: 6/92 cut-off events. [2022-11-25 18:18:58,530 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:18:58,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 6/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2022-11-25 18:18:58,535 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-11-25 18:19:02,565 INFO L134 LiptonReduction]: Checked pairs total: 790 [2022-11-25 18:19:02,565 INFO L136 LiptonReduction]: Total number of compositions: 90 [2022-11-25 18:19:02,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:19:02,592 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;@334c6a32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:19:02,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-25 18:19:02,594 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:19:02,595 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:19:02,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:02,596 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:19:02,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash 386, now seen corresponding path program 1 times [2022-11-25 18:19:02,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:02,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678832561] [2022-11-25 18:19:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:02,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:02,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678832561] [2022-11-25 18:19:02,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678832561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:02,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:02,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:19:02,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793098924] [2022-11-25 18:19:02,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:02,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:19:02,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:02,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:19:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:19:02,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 189 [2022-11-25 18:19:02,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:02,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:02,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 189 [2022-11-25 18:19:02,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:02,907 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2022-11-25 18:19:02,908 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:19:02,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 508 event pairs, 42 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2022-11-25 18:19:02,913 INFO L137 encePairwiseOnDemand]: 186/189 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-11-25 18:19:02,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2022-11-25 18:19:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:19:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:19:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 200 transitions. [2022-11-25 18:19:02,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2022-11-25 18:19:02,929 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 200 transitions. [2022-11-25 18:19:02,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 200 transitions. [2022-11-25 18:19:02,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:02,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 200 transitions. [2022-11-25 18:19:02,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 100.0) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:02,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:02,955 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:02,957 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 200 transitions. [2022-11-25 18:19:02,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2022-11-25 18:19:02,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:19:02,963 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2022-11-25 18:19:02,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2022-11-25 18:19:02,969 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-11-25 18:19:02,970 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2022-11-25 18:19:02,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:02,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:02,975 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:19:02,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:19:02,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:02,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash 380462, now seen corresponding path program 1 times [2022-11-25 18:19:02,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286591180] [2022-11-25 18:19:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:03,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:03,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286591180] [2022-11-25 18:19:03,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286591180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:03,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:03,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:19:03,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894500420] [2022-11-25 18:19:03,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:03,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:19:03,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:19:03,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:19:03,362 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 189 [2022-11-25 18:19:03,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:03,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 189 [2022-11-25 18:19:03,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:03,448 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2022-11-25 18:19:03,448 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:19:03,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 447 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2022-11-25 18:19:03,453 INFO L137 encePairwiseOnDemand]: 186/189 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-11-25 18:19:03,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2022-11-25 18:19:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:19:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:19:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2022-11-25 18:19:03,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47795414462081126 [2022-11-25 18:19:03,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2022-11-25 18:19:03,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2022-11-25 18:19:03,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:03,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2022-11-25 18:19:03,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,464 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 271 transitions. [2022-11-25 18:19:03,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2022-11-25 18:19:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:19:03,465 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2022-11-25 18:19:03,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-11-25 18:19:03,466 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-11-25 18:19:03,466 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2022-11-25 18:19:03,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:03,467 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:19:03,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:19:03,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash 380461, now seen corresponding path program 1 times [2022-11-25 18:19:03,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:03,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634024375] [2022-11-25 18:19:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:03,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:03,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:03,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634024375] [2022-11-25 18:19:03,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634024375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:03,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:03,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:19:03,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629087771] [2022-11-25 18:19:03,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:03,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:19:03,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:03,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:19:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:19:03,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 189 [2022-11-25 18:19:03,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:03,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 189 [2022-11-25 18:19:03,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:03,643 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2022-11-25 18:19:03,643 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:19:03,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 399 event pairs, 36 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2022-11-25 18:19:03,646 INFO L137 encePairwiseOnDemand]: 186/189 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-25 18:19:03,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2022-11-25 18:19:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:19:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:19:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2022-11-25 18:19:03,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4532627865961199 [2022-11-25 18:19:03,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2022-11-25 18:19:03,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2022-11-25 18:19:03,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:03,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2022-11-25 18:19:03,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,657 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 257 transitions. [2022-11-25 18:19:03,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2022-11-25 18:19:03,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:03,658 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2022-11-25 18:19:03,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2022-11-25 18:19:03,660 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-25 18:19:03,660 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2022-11-25 18:19:03,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:03,661 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:19:03,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:19:03,662 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash 365630537, now seen corresponding path program 1 times [2022-11-25 18:19:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:03,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118193524] [2022-11-25 18:19:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:03,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:03,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118193524] [2022-11-25 18:19:03,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118193524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:03,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:03,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:19:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778591453] [2022-11-25 18:19:03,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:03,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:19:03,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:19:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:19:03,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 189 [2022-11-25 18:19:03,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:03,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 189 [2022-11-25 18:19:03,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:03,871 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2022-11-25 18:19:03,871 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:19:03,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 281 event pairs, 27 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2022-11-25 18:19:03,872 INFO L137 encePairwiseOnDemand]: 187/189 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-11-25 18:19:03,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2022-11-25 18:19:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:19:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:19:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2022-11-25 18:19:03,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2022-11-25 18:19:03,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2022-11-25 18:19:03,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2022-11-25 18:19:03,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:03,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2022-11-25 18:19:03,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,878 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 258 transitions. [2022-11-25 18:19:03,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2022-11-25 18:19:03,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:03,880 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2022-11-25 18:19:03,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2022-11-25 18:19:03,881 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-25 18:19:03,881 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2022-11-25 18:19:03,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:03,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:03,881 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:19:03,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:19:03,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:03,883 INFO L85 PathProgramCache]: Analyzing trace with hash 365630536, now seen corresponding path program 1 times [2022-11-25 18:19:03,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:03,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139558563] [2022-11-25 18:19:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:03,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:03,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:03,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139558563] [2022-11-25 18:19:03,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139558563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:03,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:03,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:19:03,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780005747] [2022-11-25 18:19:03,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:03,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:19:03,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:03,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:19:03,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:19:04,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 189 [2022-11-25 18:19:04,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:04,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 189 [2022-11-25 18:19:04,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:04,070 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2022-11-25 18:19:04,071 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:19:04,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 172 event pairs, 18 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2022-11-25 18:19:04,072 INFO L137 encePairwiseOnDemand]: 187/189 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-11-25 18:19:04,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2022-11-25 18:19:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:19:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:19:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2022-11-25 18:19:04,074 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42680776014109345 [2022-11-25 18:19:04,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2022-11-25 18:19:04,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2022-11-25 18:19:04,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:04,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2022-11-25 18:19:04,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,079 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 242 transitions. [2022-11-25 18:19:04,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2022-11-25 18:19:04,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:04,080 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2022-11-25 18:19:04,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2022-11-25 18:19:04,083 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-25 18:19:04,083 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2022-11-25 18:19:04,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,084 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:04,084 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:04,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:19:04,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash 483124862, now seen corresponding path program 1 times [2022-11-25 18:19:04,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:04,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262275250] [2022-11-25 18:19:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:04,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:04,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:04,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262275250] [2022-11-25 18:19:04,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262275250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:04,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:04,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:19:04,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833619966] [2022-11-25 18:19:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:04,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:19:04,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:19:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:19:04,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 189 [2022-11-25 18:19:04,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:04,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 189 [2022-11-25 18:19:04,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:04,324 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2022-11-25 18:19:04,324 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:19:04,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 271 event pairs, 13 based on Foata normal form. 1/67 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2022-11-25 18:19:04,325 INFO L137 encePairwiseOnDemand]: 185/189 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2022-11-25 18:19:04,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2022-11-25 18:19:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:19:04,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:19:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2022-11-25 18:19:04,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2022-11-25 18:19:04,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2022-11-25 18:19:04,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2022-11-25 18:19:04,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:04,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2022-11-25 18:19:04,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,331 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 285 transitions. [2022-11-25 18:19:04,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2022-11-25 18:19:04,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:04,332 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2022-11-25 18:19:04,333 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2022-11-25 18:19:04,336 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2022-11-25 18:19:04,336 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2022-11-25 18:19:04,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:04,337 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:04,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:19:04,337 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:04,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1087069572, now seen corresponding path program 1 times [2022-11-25 18:19:04,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:04,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180097260] [2022-11-25 18:19:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:04,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:04,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:04,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180097260] [2022-11-25 18:19:04,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180097260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:04,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:04,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:19:04,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901319229] [2022-11-25 18:19:04,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:04,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:19:04,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:04,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:19:04,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:19:04,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:04,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:04,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:04,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:04,712 INFO L130 PetriNetUnfolder]: 68/137 cut-off events. [2022-11-25 18:19:04,712 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-25 18:19:04,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 137 events. 68/137 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 422 event pairs, 24 based on Foata normal form. 2/139 useless extension candidates. Maximal degree in co-relation 320. Up to 74 conditions per place. [2022-11-25 18:19:04,713 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 19 selfloop transitions, 4 changer transitions 17/40 dead transitions. [2022-11-25 18:19:04,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 189 flow [2022-11-25 18:19:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:19:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:19:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 515 transitions. [2022-11-25 18:19:04,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4541446208112875 [2022-11-25 18:19:04,725 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 515 transitions. [2022-11-25 18:19:04,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 515 transitions. [2022-11-25 18:19:04,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:04,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 515 transitions. [2022-11-25 18:19:04,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,730 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,730 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 6 states and 515 transitions. [2022-11-25 18:19:04,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 189 flow [2022-11-25 18:19:04,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:04,733 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 79 flow [2022-11-25 18:19:04,733 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=79, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2022-11-25 18:19:04,734 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2022-11-25 18:19:04,734 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 79 flow [2022-11-25 18:19:04,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:04,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:04,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:04,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:19:04,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:04,736 INFO L85 PathProgramCache]: Analyzing trace with hash -537730476, now seen corresponding path program 2 times [2022-11-25 18:19:04,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:04,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567632558] [2022-11-25 18:19:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:04,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:04,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:04,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567632558] [2022-11-25 18:19:04,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567632558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:04,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642126738] [2022-11-25 18:19:04,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:19:04,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:04,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:04,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:19:04,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:19:04,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:04,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:19:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:05,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:05,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642126738] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:05,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:19:05,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-11-25 18:19:05,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631526262] [2022-11-25 18:19:05,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:05,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:19:05,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:05,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:19:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:19:05,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 189 [2022-11-25 18:19:05,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:05,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 189 [2022-11-25 18:19:05,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:05,242 INFO L130 PetriNetUnfolder]: 49/93 cut-off events. [2022-11-25 18:19:05,242 INFO L131 PetriNetUnfolder]: For 57/62 co-relation queries the response was YES. [2022-11-25 18:19:05,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 93 events. 49/93 cut-off events. For 57/62 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 228 event pairs, 3 based on Foata normal form. 11/104 useless extension candidates. Maximal degree in co-relation 296. Up to 62 conditions per place. [2022-11-25 18:19:05,244 INFO L137 encePairwiseOnDemand]: 185/189 looper letters, 24 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2022-11-25 18:19:05,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 173 flow [2022-11-25 18:19:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:19:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:19:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2022-11-25 18:19:05,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4695767195767196 [2022-11-25 18:19:05,247 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2022-11-25 18:19:05,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2022-11-25 18:19:05,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:05,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2022-11-25 18:19:05,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,251 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,251 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 79 flow. Second operand 4 states and 355 transitions. [2022-11-25 18:19:05,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 173 flow [2022-11-25 18:19:05,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 157 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-25 18:19:05,254 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 93 flow [2022-11-25 18:19:05,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2022-11-25 18:19:05,255 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2022-11-25 18:19:05,256 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 93 flow [2022-11-25 18:19:05,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:05,256 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:05,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:05,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 18:19:05,464 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1231261806, now seen corresponding path program 3 times [2022-11-25 18:19:05,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:05,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977876290] [2022-11-25 18:19:05,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:05,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:05,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:05,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977876290] [2022-11-25 18:19:05,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977876290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:05,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:05,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:19:05,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584457574] [2022-11-25 18:19:05,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:05,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:19:05,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:19:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:19:05,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 189 [2022-11-25 18:19:05,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:05,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 189 [2022-11-25 18:19:05,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:05,723 INFO L130 PetriNetUnfolder]: 67/132 cut-off events. [2022-11-25 18:19:05,724 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2022-11-25 18:19:05,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 132 events. 67/132 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 348 event pairs, 21 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 437. Up to 75 conditions per place. [2022-11-25 18:19:05,729 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 29 selfloop transitions, 6 changer transitions 2/37 dead transitions. [2022-11-25 18:19:05,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 230 flow [2022-11-25 18:19:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:19:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:19:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 433 transitions. [2022-11-25 18:19:05,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4582010582010582 [2022-11-25 18:19:05,732 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 433 transitions. [2022-11-25 18:19:05,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 433 transitions. [2022-11-25 18:19:05,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:05,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 433 transitions. [2022-11-25 18:19:05,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,737 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,738 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 93 flow. Second operand 5 states and 433 transitions. [2022-11-25 18:19:05,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 230 flow [2022-11-25 18:19:05,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 225 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:05,745 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 132 flow [2022-11-25 18:19:05,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2022-11-25 18:19:05,748 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2022-11-25 18:19:05,748 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 132 flow [2022-11-25 18:19:05,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:05,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:05,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:05,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:19:05,749 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:05,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1773311678, now seen corresponding path program 4 times [2022-11-25 18:19:05,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:05,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388458390] [2022-11-25 18:19:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:05,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:05,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388458390] [2022-11-25 18:19:05,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388458390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:05,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039522578] [2022-11-25 18:19:05,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:19:05,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:05,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:05,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:19:05,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:19:05,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:05,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:19:05,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:06,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:06,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039522578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:06,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:06,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-25 18:19:06,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293364694] [2022-11-25 18:19:06,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:06,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:19:06,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:06,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:19:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:19:06,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:06,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:06,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:06,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:06,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:06,355 INFO L130 PetriNetUnfolder]: 82/157 cut-off events. [2022-11-25 18:19:06,356 INFO L131 PetriNetUnfolder]: For 407/407 co-relation queries the response was YES. [2022-11-25 18:19:06,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 157 events. 82/157 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 450 event pairs, 26 based on Foata normal form. 6/163 useless extension candidates. Maximal degree in co-relation 639. Up to 104 conditions per place. [2022-11-25 18:19:06,358 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 33 selfloop transitions, 11 changer transitions 2/46 dead transitions. [2022-11-25 18:19:06,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 334 flow [2022-11-25 18:19:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:19:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:19:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 597 transitions. [2022-11-25 18:19:06,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4512471655328798 [2022-11-25 18:19:06,361 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 597 transitions. [2022-11-25 18:19:06,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 597 transitions. [2022-11-25 18:19:06,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:06,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 597 transitions. [2022-11-25 18:19:06,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.28571428571429) internal successors, (597), 7 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:06,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 189.0) internal successors, (1512), 8 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:06,367 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 189.0) internal successors, (1512), 8 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:06,367 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 132 flow. Second operand 7 states and 597 transitions. [2022-11-25 18:19:06,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 334 flow [2022-11-25 18:19:06,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 317 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:06,371 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 180 flow [2022-11-25 18:19:06,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2022-11-25 18:19:06,372 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2022-11-25 18:19:06,372 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 180 flow [2022-11-25 18:19:06,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:06,373 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:06,373 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:06,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:06,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:19:06,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1868504056, now seen corresponding path program 5 times [2022-11-25 18:19:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:06,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674820976] [2022-11-25 18:19:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:06,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:06,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:06,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674820976] [2022-11-25 18:19:06,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674820976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:06,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895677720] [2022-11-25 18:19:06,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:19:06,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:06,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:06,693 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:06,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:19:06,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:19:06,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:06,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:19:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:06,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:06,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895677720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:06,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:06,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 18:19:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16366197] [2022-11-25 18:19:06,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:06,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:19:06,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:19:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:19:06,927 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:06,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 26 transitions, 180 flow. Second operand has 8 states, 8 states have (on average 81.375) internal successors, (651), 8 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:06,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:06,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:06,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:07,070 INFO L130 PetriNetUnfolder]: 76/143 cut-off events. [2022-11-25 18:19:07,070 INFO L131 PetriNetUnfolder]: For 459/459 co-relation queries the response was YES. [2022-11-25 18:19:07,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 143 events. 76/143 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 380 event pairs, 21 based on Foata normal form. 6/149 useless extension candidates. Maximal degree in co-relation 613. Up to 87 conditions per place. [2022-11-25 18:19:07,072 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 25 selfloop transitions, 11 changer transitions 2/38 dead transitions. [2022-11-25 18:19:07,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 313 flow [2022-11-25 18:19:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:19:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:19:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 428 transitions. [2022-11-25 18:19:07,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45291005291005293 [2022-11-25 18:19:07,075 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 428 transitions. [2022-11-25 18:19:07,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 428 transitions. [2022-11-25 18:19:07,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:07,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 428 transitions. [2022-11-25 18:19:07,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:07,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:07,079 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:07,080 INFO L175 Difference]: Start difference. First operand has 42 places, 26 transitions, 180 flow. Second operand 5 states and 428 transitions. [2022-11-25 18:19:07,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 313 flow [2022-11-25 18:19:07,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 298 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:07,084 INFO L231 Difference]: Finished difference. Result has 45 places, 26 transitions, 190 flow [2022-11-25 18:19:07,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=45, PETRI_TRANSITIONS=26} [2022-11-25 18:19:07,084 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2022-11-25 18:19:07,085 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 190 flow [2022-11-25 18:19:07,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 81.375) internal successors, (651), 8 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:07,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:07,085 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:07,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:07,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:07,292 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash -137966243, now seen corresponding path program 1 times [2022-11-25 18:19:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:07,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555790317] [2022-11-25 18:19:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:07,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:07,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:07,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555790317] [2022-11-25 18:19:07,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555790317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:07,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155451799] [2022-11-25 18:19:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:07,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:07,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:07,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:07,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:19:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 18:19:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:07,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:07,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155451799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:07,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:07,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2022-11-25 18:19:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318017601] [2022-11-25 18:19:07,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:07,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:19:07,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:19:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:19:07,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 189 [2022-11-25 18:19:07,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 26 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:07,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:07,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 189 [2022-11-25 18:19:07,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:07,816 INFO L130 PetriNetUnfolder]: 122/230 cut-off events. [2022-11-25 18:19:07,816 INFO L131 PetriNetUnfolder]: For 644/659 co-relation queries the response was YES. [2022-11-25 18:19:07,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 230 events. 122/230 cut-off events. For 644/659 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 786 event pairs, 16 based on Foata normal form. 18/245 useless extension candidates. Maximal degree in co-relation 963. Up to 113 conditions per place. [2022-11-25 18:19:07,818 INFO L137 encePairwiseOnDemand]: 185/189 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2022-11-25 18:19:07,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 395 flow [2022-11-25 18:19:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:19:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:19:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2022-11-25 18:19:07,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2022-11-25 18:19:07,821 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2022-11-25 18:19:07,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2022-11-25 18:19:07,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:07,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2022-11-25 18:19:07,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:07,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:07,825 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:07,825 INFO L175 Difference]: Start difference. First operand has 45 places, 26 transitions, 190 flow. Second operand 4 states and 375 transitions. [2022-11-25 18:19:07,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 395 flow [2022-11-25 18:19:07,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 358 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-25 18:19:07,829 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 269 flow [2022-11-25 18:19:07,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2022-11-25 18:19:07,830 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2022-11-25 18:19:07,830 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 269 flow [2022-11-25 18:19:07,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:07,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:07,831 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:07,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:08,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:08,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:08,038 INFO L85 PathProgramCache]: Analyzing trace with hash -405714293, now seen corresponding path program 2 times [2022-11-25 18:19:08,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:08,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142013375] [2022-11-25 18:19:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:08,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:08,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142013375] [2022-11-25 18:19:08,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142013375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:08,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347718564] [2022-11-25 18:19:08,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:19:08,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:08,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:08,297 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:08,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:19:08,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:19:08,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:19:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:08,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:08,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347718564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:08,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:08,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-11-25 18:19:08,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574446960] [2022-11-25 18:19:08,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:08,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:19:08,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:08,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:19:08,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:19:08,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:08,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 269 flow. Second operand has 12 states, 12 states have (on average 81.83333333333333) internal successors, (982), 12 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:08,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:08,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:08,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:09,106 INFO L130 PetriNetUnfolder]: 256/480 cut-off events. [2022-11-25 18:19:09,107 INFO L131 PetriNetUnfolder]: For 1293/1293 co-relation queries the response was YES. [2022-11-25 18:19:09,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088 conditions, 480 events. 256/480 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1989 event pairs, 37 based on Foata normal form. 12/492 useless extension candidates. Maximal degree in co-relation 2072. Up to 185 conditions per place. [2022-11-25 18:19:09,111 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 68 selfloop transitions, 20 changer transitions 4/92 dead transitions. [2022-11-25 18:19:09,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 92 transitions, 772 flow [2022-11-25 18:19:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:19:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:19:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 863 transitions. [2022-11-25 18:19:09,115 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45661375661375664 [2022-11-25 18:19:09,116 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 863 transitions. [2022-11-25 18:19:09,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 863 transitions. [2022-11-25 18:19:09,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:09,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 863 transitions. [2022-11-25 18:19:09,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 86.3) internal successors, (863), 10 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:09,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 189.0) internal successors, (2079), 11 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:09,123 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 189.0) internal successors, (2079), 11 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:09,123 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 269 flow. Second operand 10 states and 863 transitions. [2022-11-25 18:19:09,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 92 transitions, 772 flow [2022-11-25 18:19:09,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 92 transitions, 754 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-25 18:19:09,129 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 467 flow [2022-11-25 18:19:09,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=467, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2022-11-25 18:19:09,130 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2022-11-25 18:19:09,130 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 467 flow [2022-11-25 18:19:09,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.83333333333333) internal successors, (982), 12 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:09,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:09,131 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:09,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:09,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:09,337 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:09,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2029830787, now seen corresponding path program 3 times [2022-11-25 18:19:09,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:09,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158424069] [2022-11-25 18:19:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:09,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:09,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:09,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158424069] [2022-11-25 18:19:09,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158424069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560254612] [2022-11-25 18:19:09,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:19:09,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:09,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:09,589 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:09,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:19:09,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:19:09,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:09,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:19:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:09,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:09,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560254612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:09,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:09,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-25 18:19:09,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575386114] [2022-11-25 18:19:09,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:09,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:19:09,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:19:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:19:10,047 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:10,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 467 flow. Second operand has 14 states, 14 states have (on average 81.21428571428571) internal successors, (1137), 14 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:10,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:10,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:10,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:10,899 INFO L130 PetriNetUnfolder]: 326/606 cut-off events. [2022-11-25 18:19:10,900 INFO L131 PetriNetUnfolder]: For 3052/3052 co-relation queries the response was YES. [2022-11-25 18:19:10,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 606 events. 326/606 cut-off events. For 3052/3052 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2697 event pairs, 41 based on Foata normal form. 38/644 useless extension candidates. Maximal degree in co-relation 3054. Up to 209 conditions per place. [2022-11-25 18:19:10,907 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 90 selfloop transitions, 40 changer transitions 7/137 dead transitions. [2022-11-25 18:19:10,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 1237 flow [2022-11-25 18:19:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 18:19:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 18:19:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1544 transitions. [2022-11-25 18:19:10,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4538506760728983 [2022-11-25 18:19:10,912 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1544 transitions. [2022-11-25 18:19:10,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1544 transitions. [2022-11-25 18:19:10,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:10,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1544 transitions. [2022-11-25 18:19:10,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.77777777777777) internal successors, (1544), 18 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:10,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 189.0) internal successors, (3591), 19 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:10,923 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 189.0) internal successors, (3591), 19 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:10,923 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 467 flow. Second operand 18 states and 1544 transitions. [2022-11-25 18:19:10,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 1237 flow [2022-11-25 18:19:10,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 137 transitions, 1162 flow, removed 34 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:10,936 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 756 flow [2022-11-25 18:19:10,937 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=756, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2022-11-25 18:19:10,937 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2022-11-25 18:19:10,938 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 756 flow [2022-11-25 18:19:10,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.21428571428571) internal successors, (1137), 14 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:10,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:10,939 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:10,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:11,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:11,148 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:11,149 INFO L85 PathProgramCache]: Analyzing trace with hash -517306757, now seen corresponding path program 4 times [2022-11-25 18:19:11,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:11,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784128724] [2022-11-25 18:19:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:11,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:11,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:11,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784128724] [2022-11-25 18:19:11,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784128724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:11,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662216926] [2022-11-25 18:19:11,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:19:11,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:11,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:11,363 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:11,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:19:11,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:19:11,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:11,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:19:11,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:11,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:11,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662216926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:11,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:11,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-25 18:19:11,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052053817] [2022-11-25 18:19:11,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:11,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:19:11,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:11,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:19:11,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:19:11,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:11,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 756 flow. Second operand has 14 states, 14 states have (on average 80.92857142857143) internal successors, (1133), 14 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:11,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:11,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:11,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:13,000 INFO L130 PetriNetUnfolder]: 460/916 cut-off events. [2022-11-25 18:19:13,000 INFO L131 PetriNetUnfolder]: For 10489/10489 co-relation queries the response was YES. [2022-11-25 18:19:13,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5748 conditions, 916 events. 460/916 cut-off events. For 10489/10489 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4967 event pairs, 8 based on Foata normal form. 16/932 useless extension candidates. Maximal degree in co-relation 5719. Up to 293 conditions per place. [2022-11-25 18:19:13,013 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 121 selfloop transitions, 91 changer transitions 33/245 dead transitions. [2022-11-25 18:19:13,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 245 transitions, 2852 flow [2022-11-25 18:19:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 18:19:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 18:19:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2549 transitions. [2022-11-25 18:19:13,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44955908289241625 [2022-11-25 18:19:13,022 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2549 transitions. [2022-11-25 18:19:13,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2549 transitions. [2022-11-25 18:19:13,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:13,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2549 transitions. [2022-11-25 18:19:13,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 84.96666666666667) internal successors, (2549), 30 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:13,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 189.0) internal successors, (5859), 31 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:13,065 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 189.0) internal successors, (5859), 31 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:13,065 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 756 flow. Second operand 30 states and 2549 transitions. [2022-11-25 18:19:13,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 245 transitions, 2852 flow [2022-11-25 18:19:13,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 245 transitions, 2515 flow, removed 132 selfloop flow, removed 8 redundant places. [2022-11-25 18:19:13,094 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 1619 flow [2022-11-25 18:19:13,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1619, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2022-11-25 18:19:13,095 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2022-11-25 18:19:13,095 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 1619 flow [2022-11-25 18:19:13,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.92857142857143) internal successors, (1133), 14 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:13,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:13,096 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:13,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:13,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 18:19:13,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:13,303 INFO L85 PathProgramCache]: Analyzing trace with hash -518496049, now seen corresponding path program 5 times [2022-11-25 18:19:13,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:13,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421510680] [2022-11-25 18:19:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:13,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:13,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:13,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421510680] [2022-11-25 18:19:13,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421510680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:13,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930854017] [2022-11-25 18:19:13,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:19:13,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:13,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:13,530 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:13,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:19:13,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:19:13,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:13,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:19:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:13,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:13,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930854017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:13,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:13,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-25 18:19:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862304816] [2022-11-25 18:19:13,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:13,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:19:13,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:13,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:19:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:19:13,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:13,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 127 transitions, 1619 flow. Second operand has 14 states, 14 states have (on average 80.85714285714286) internal successors, (1132), 14 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:13,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:13,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:13,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:14,824 INFO L130 PetriNetUnfolder]: 486/967 cut-off events. [2022-11-25 18:19:14,825 INFO L131 PetriNetUnfolder]: For 19689/19689 co-relation queries the response was YES. [2022-11-25 18:19:14,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6934 conditions, 967 events. 486/967 cut-off events. For 19689/19689 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5300 event pairs, 24 based on Foata normal form. 30/997 useless extension candidates. Maximal degree in co-relation 6895. Up to 278 conditions per place. [2022-11-25 18:19:14,839 INFO L137 encePairwiseOnDemand]: 182/189 looper letters, 88 selfloop transitions, 106 changer transitions 5/199 dead transitions. [2022-11-25 18:19:14,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 199 transitions, 2794 flow [2022-11-25 18:19:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:19:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:19:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1107 transitions. [2022-11-25 18:19:14,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2022-11-25 18:19:14,844 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1107 transitions. [2022-11-25 18:19:14,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1107 transitions. [2022-11-25 18:19:14,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:14,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1107 transitions. [2022-11-25 18:19:14,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 85.15384615384616) internal successors, (1107), 13 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:14,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 189.0) internal successors, (2646), 14 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:14,854 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 189.0) internal successors, (2646), 14 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:14,854 INFO L175 Difference]: Start difference. First operand has 113 places, 127 transitions, 1619 flow. Second operand 13 states and 1107 transitions. [2022-11-25 18:19:14,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 199 transitions, 2794 flow [2022-11-25 18:19:14,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 199 transitions, 2245 flow, removed 236 selfloop flow, removed 7 redundant places. [2022-11-25 18:19:14,928 INFO L231 Difference]: Finished difference. Result has 120 places, 153 transitions, 1964 flow [2022-11-25 18:19:14,928 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1964, PETRI_PLACES=120, PETRI_TRANSITIONS=153} [2022-11-25 18:19:14,928 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 91 predicate places. [2022-11-25 18:19:14,929 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 153 transitions, 1964 flow [2022-11-25 18:19:14,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.85714285714286) internal successors, (1132), 14 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:14,929 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:14,930 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:14,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:15,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:19:15,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -381134791, now seen corresponding path program 6 times [2022-11-25 18:19:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:15,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624297056] [2022-11-25 18:19:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:15,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:15,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:15,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624297056] [2022-11-25 18:19:15,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624297056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:15,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324327708] [2022-11-25 18:19:15,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:19:15,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:15,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:15,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:15,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:19:15,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 18:19:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:19:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:15,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:15,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324327708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:15,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:15,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-25 18:19:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810776761] [2022-11-25 18:19:15,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:19:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:19:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:19:15,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:15,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 153 transitions, 1964 flow. Second operand has 15 states, 15 states have (on average 81.33333333333333) internal successors, (1220), 15 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:15,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:15,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:15,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:17,001 INFO L130 PetriNetUnfolder]: 725/1434 cut-off events. [2022-11-25 18:19:17,001 INFO L131 PetriNetUnfolder]: For 41417/41417 co-relation queries the response was YES. [2022-11-25 18:19:17,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10636 conditions, 1434 events. 725/1434 cut-off events. For 41417/41417 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8761 event pairs, 176 based on Foata normal form. 100/1534 useless extension candidates. Maximal degree in co-relation 10594. Up to 832 conditions per place. [2022-11-25 18:19:17,027 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 204 selfloop transitions, 127 changer transitions 3/334 dead transitions. [2022-11-25 18:19:17,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 334 transitions, 4707 flow [2022-11-25 18:19:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 18:19:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 18:19:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2051 transitions. [2022-11-25 18:19:17,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4521604938271605 [2022-11-25 18:19:17,033 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2051 transitions. [2022-11-25 18:19:17,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2051 transitions. [2022-11-25 18:19:17,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:17,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2051 transitions. [2022-11-25 18:19:17,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.45833333333333) internal successors, (2051), 24 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:17,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 189.0) internal successors, (4725), 25 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:17,047 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 189.0) internal successors, (4725), 25 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:17,047 INFO L175 Difference]: Start difference. First operand has 120 places, 153 transitions, 1964 flow. Second operand 24 states and 2051 transitions. [2022-11-25 18:19:17,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 334 transitions, 4707 flow [2022-11-25 18:19:17,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 334 transitions, 4382 flow, removed 145 selfloop flow, removed 5 redundant places. [2022-11-25 18:19:17,251 INFO L231 Difference]: Finished difference. Result has 151 places, 225 transitions, 3432 flow [2022-11-25 18:19:17,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3432, PETRI_PLACES=151, PETRI_TRANSITIONS=225} [2022-11-25 18:19:17,251 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2022-11-25 18:19:17,252 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 225 transitions, 3432 flow [2022-11-25 18:19:17,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.33333333333333) internal successors, (1220), 15 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:17,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:17,253 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:17,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:17,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 18:19:17,459 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:17,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:17,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1516870409, now seen corresponding path program 7 times [2022-11-25 18:19:17,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:17,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415422210] [2022-11-25 18:19:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:17,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:17,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415422210] [2022-11-25 18:19:17,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415422210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837437335] [2022-11-25 18:19:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:19:17,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:17,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:17,637 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:17,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:19:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:17,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:19:17,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:17,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:17,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837437335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:17,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:17,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-25 18:19:17,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013181696] [2022-11-25 18:19:17,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:17,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:19:17,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:19:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:19:18,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:18,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 225 transitions, 3432 flow. Second operand has 14 states, 14 states have (on average 80.85714285714286) internal successors, (1132), 14 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:18,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:18,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:18,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:19,312 INFO L130 PetriNetUnfolder]: 860/1731 cut-off events. [2022-11-25 18:19:19,313 INFO L131 PetriNetUnfolder]: For 67962/67962 co-relation queries the response was YES. [2022-11-25 18:19:19,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14862 conditions, 1731 events. 860/1731 cut-off events. For 67962/67962 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11060 event pairs, 81 based on Foata normal form. 16/1747 useless extension candidates. Maximal degree in co-relation 14807. Up to 542 conditions per place. [2022-11-25 18:19:19,355 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 159 selfloop transitions, 182 changer transitions 5/346 dead transitions. [2022-11-25 18:19:19,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 346 transitions, 6044 flow [2022-11-25 18:19:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:19:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 18:19:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1856 transitions. [2022-11-25 18:19:19,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44636844636844636 [2022-11-25 18:19:19,360 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1856 transitions. [2022-11-25 18:19:19,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1856 transitions. [2022-11-25 18:19:19,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:19,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1856 transitions. [2022-11-25 18:19:19,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 84.36363636363636) internal successors, (1856), 22 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:19,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 189.0) internal successors, (4347), 23 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:19,373 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 189.0) internal successors, (4347), 23 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:19,373 INFO L175 Difference]: Start difference. First operand has 151 places, 225 transitions, 3432 flow. Second operand 22 states and 1856 transitions. [2022-11-25 18:19:19,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 346 transitions, 6044 flow [2022-11-25 18:19:19,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 346 transitions, 5421 flow, removed 276 selfloop flow, removed 8 redundant places. [2022-11-25 18:19:19,620 INFO L231 Difference]: Finished difference. Result has 173 places, 274 transitions, 4560 flow [2022-11-25 18:19:19,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=2911, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4560, PETRI_PLACES=173, PETRI_TRANSITIONS=274} [2022-11-25 18:19:19,621 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 144 predicate places. [2022-11-25 18:19:19,621 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 274 transitions, 4560 flow [2022-11-25 18:19:19,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.85714285714286) internal successors, (1132), 14 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:19,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:19,621 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:19,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 18:19:19,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:19:19,822 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:19,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1518059701, now seen corresponding path program 8 times [2022-11-25 18:19:19,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:19,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082302790] [2022-11-25 18:19:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:19,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:19,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082302790] [2022-11-25 18:19:19,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082302790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:19,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010910492] [2022-11-25 18:19:19,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:19:19,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:19,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:20,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:20,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:19:20,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:19:20,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:20,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:19:20,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:20,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010910492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:20,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:20,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-25 18:19:20,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575365107] [2022-11-25 18:19:20,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:20,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:19:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:19:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:19:20,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:20,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 274 transitions, 4560 flow. Second operand has 15 states, 15 states have (on average 80.8) internal successors, (1212), 15 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:20,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:20,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:20,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:21,639 INFO L130 PetriNetUnfolder]: 828/1658 cut-off events. [2022-11-25 18:19:21,640 INFO L131 PetriNetUnfolder]: For 79913/79913 co-relation queries the response was YES. [2022-11-25 18:19:21,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14325 conditions, 1658 events. 828/1658 cut-off events. For 79913/79913 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10427 event pairs, 195 based on Foata normal form. 36/1694 useless extension candidates. Maximal degree in co-relation 14263. Up to 856 conditions per place. [2022-11-25 18:19:21,672 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 152 selfloop transitions, 150 changer transitions 3/305 dead transitions. [2022-11-25 18:19:21,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 305 transitions, 5233 flow [2022-11-25 18:19:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:19:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:19:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1104 transitions. [2022-11-25 18:19:21,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44932844932844934 [2022-11-25 18:19:21,676 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1104 transitions. [2022-11-25 18:19:21,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1104 transitions. [2022-11-25 18:19:21,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:21,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1104 transitions. [2022-11-25 18:19:21,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 84.92307692307692) internal successors, (1104), 13 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:21,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 189.0) internal successors, (2646), 14 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:21,684 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 189.0) internal successors, (2646), 14 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:21,684 INFO L175 Difference]: Start difference. First operand has 173 places, 274 transitions, 4560 flow. Second operand 13 states and 1104 transitions. [2022-11-25 18:19:21,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 305 transitions, 5233 flow [2022-11-25 18:19:22,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 305 transitions, 5019 flow, removed 106 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:22,019 INFO L231 Difference]: Finished difference. Result has 184 places, 268 transitions, 4601 flow [2022-11-25 18:19:22,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=4095, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4601, PETRI_PLACES=184, PETRI_TRANSITIONS=268} [2022-11-25 18:19:22,020 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2022-11-25 18:19:22,020 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 268 transitions, 4601 flow [2022-11-25 18:19:22,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.8) internal successors, (1212), 15 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:22,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:22,021 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:22,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:22,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:22,222 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1770025830, now seen corresponding path program 9 times [2022-11-25 18:19:22,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:22,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107603170] [2022-11-25 18:19:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:22,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:22,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:22,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107603170] [2022-11-25 18:19:22,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107603170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:22,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603108646] [2022-11-25 18:19:22,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:19:22,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:22,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:22,459 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:22,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:19:22,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:19:22,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:22,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:19:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:19:22,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:19:22,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603108646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:22,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:22,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-11-25 18:19:22,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565740725] [2022-11-25 18:19:22,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:22,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:19:22,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:19:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:19:22,806 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 189 [2022-11-25 18:19:22,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 268 transitions, 4601 flow. Second operand has 9 states, 9 states have (on average 89.11111111111111) internal successors, (802), 9 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:22,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:22,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 189 [2022-11-25 18:19:22,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:23,651 INFO L130 PetriNetUnfolder]: 999/2055 cut-off events. [2022-11-25 18:19:23,652 INFO L131 PetriNetUnfolder]: For 101344/101352 co-relation queries the response was YES. [2022-11-25 18:19:23,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19069 conditions, 2055 events. 999/2055 cut-off events. For 101344/101352 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14116 event pairs, 158 based on Foata normal form. 104/2157 useless extension candidates. Maximal degree in co-relation 19004. Up to 1032 conditions per place. [2022-11-25 18:19:23,687 INFO L137 encePairwiseOnDemand]: 185/189 looper letters, 231 selfloop transitions, 96 changer transitions 57/393 dead transitions. [2022-11-25 18:19:23,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 393 transitions, 7661 flow [2022-11-25 18:19:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:19:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:19:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2022-11-25 18:19:23,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4984126984126984 [2022-11-25 18:19:23,689 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2022-11-25 18:19:23,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2022-11-25 18:19:23,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:23,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2022-11-25 18:19:23,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:23,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:23,693 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:23,693 INFO L175 Difference]: Start difference. First operand has 184 places, 268 transitions, 4601 flow. Second operand 5 states and 471 transitions. [2022-11-25 18:19:23,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 393 transitions, 7661 flow [2022-11-25 18:19:24,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 393 transitions, 7332 flow, removed 19 selfloop flow, removed 15 redundant places. [2022-11-25 18:19:24,141 INFO L231 Difference]: Finished difference. Result has 175 places, 284 transitions, 5301 flow [2022-11-25 18:19:24,141 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=4291, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5301, PETRI_PLACES=175, PETRI_TRANSITIONS=284} [2022-11-25 18:19:24,141 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 146 predicate places. [2022-11-25 18:19:24,142 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 284 transitions, 5301 flow [2022-11-25 18:19:24,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 89.11111111111111) internal successors, (802), 9 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:24,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:24,142 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:24,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:24,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:24,343 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash -614470812, now seen corresponding path program 10 times [2022-11-25 18:19:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:24,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112213357] [2022-11-25 18:19:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:24,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112213357] [2022-11-25 18:19:24,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112213357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:24,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296923100] [2022-11-25 18:19:24,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:19:24,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:24,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:24,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:19:24,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:19:24,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:24,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:19:24,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:24,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:24,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296923100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:24,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:24,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-25 18:19:24,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401542367] [2022-11-25 18:19:24,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:24,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:19:24,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:24,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:19:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:19:25,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:25,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 284 transitions, 5301 flow. Second operand has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:25,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:25,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:25,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:27,078 INFO L130 PetriNetUnfolder]: 1816/3701 cut-off events. [2022-11-25 18:19:27,079 INFO L131 PetriNetUnfolder]: For 180844/180844 co-relation queries the response was YES. [2022-11-25 18:19:27,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34665 conditions, 3701 events. 1816/3701 cut-off events. For 180844/180844 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 27814 event pairs, 247 based on Foata normal form. 72/3773 useless extension candidates. Maximal degree in co-relation 34604. Up to 1432 conditions per place. [2022-11-25 18:19:27,136 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 504 selfloop transitions, 153 changer transitions 7/664 dead transitions. [2022-11-25 18:19:27,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 664 transitions, 13064 flow [2022-11-25 18:19:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 18:19:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 18:19:27,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1461 transitions. [2022-11-25 18:19:27,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45471521942110177 [2022-11-25 18:19:27,140 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1461 transitions. [2022-11-25 18:19:27,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1461 transitions. [2022-11-25 18:19:27,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:27,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1461 transitions. [2022-11-25 18:19:27,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 85.94117647058823) internal successors, (1461), 17 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:27,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 189.0) internal successors, (3402), 18 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:27,153 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 189.0) internal successors, (3402), 18 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:27,153 INFO L175 Difference]: Start difference. First operand has 175 places, 284 transitions, 5301 flow. Second operand 17 states and 1461 transitions. [2022-11-25 18:19:27,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 664 transitions, 13064 flow [2022-11-25 18:19:27,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 664 transitions, 12817 flow, removed 121 selfloop flow, removed 3 redundant places. [2022-11-25 18:19:27,760 INFO L231 Difference]: Finished difference. Result has 188 places, 400 transitions, 8110 flow [2022-11-25 18:19:27,760 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8110, PETRI_PLACES=188, PETRI_TRANSITIONS=400} [2022-11-25 18:19:27,761 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2022-11-25 18:19:27,761 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 400 transitions, 8110 flow [2022-11-25 18:19:27,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:27,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:27,762 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:27,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:27,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 18:19:27,968 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1505442188, now seen corresponding path program 11 times [2022-11-25 18:19:27,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:27,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103434659] [2022-11-25 18:19:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:27,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:28,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:28,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103434659] [2022-11-25 18:19:28,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103434659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:28,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102020109] [2022-11-25 18:19:28,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:19:28,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:28,230 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:28,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:19:28,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:19:28,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:28,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:19:28,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:28,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:28,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102020109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:28,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:28,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 18:19:28,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065850357] [2022-11-25 18:19:28,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:28,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:19:28,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:28,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:19:28,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:19:28,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:28,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 400 transitions, 8110 flow. Second operand has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:28,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:28,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:28,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:31,845 INFO L130 PetriNetUnfolder]: 1962/3981 cut-off events. [2022-11-25 18:19:31,845 INFO L131 PetriNetUnfolder]: For 207024/207024 co-relation queries the response was YES. [2022-11-25 18:19:31,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38930 conditions, 3981 events. 1962/3981 cut-off events. For 207024/207024 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 30358 event pairs, 269 based on Foata normal form. 86/4067 useless extension candidates. Maximal degree in co-relation 38862. Up to 1498 conditions per place. [2022-11-25 18:19:31,901 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 573 selfloop transitions, 210 changer transitions 7/790 dead transitions. [2022-11-25 18:19:31,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 790 transitions, 15795 flow [2022-11-25 18:19:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 18:19:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-25 18:19:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2981 transitions. [2022-11-25 18:19:31,993 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45064247921390777 [2022-11-25 18:19:31,993 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2981 transitions. [2022-11-25 18:19:31,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2981 transitions. [2022-11-25 18:19:31,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:31,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2981 transitions. [2022-11-25 18:19:32,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 85.17142857142858) internal successors, (2981), 35 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:32,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 189.0) internal successors, (6804), 36 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:32,013 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 189.0) internal successors, (6804), 36 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:32,013 INFO L175 Difference]: Start difference. First operand has 188 places, 400 transitions, 8110 flow. Second operand 35 states and 2981 transitions. [2022-11-25 18:19:32,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 790 transitions, 15795 flow [2022-11-25 18:19:32,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 790 transitions, 15030 flow, removed 350 selfloop flow, removed 5 redundant places. [2022-11-25 18:19:32,848 INFO L231 Difference]: Finished difference. Result has 228 places, 476 transitions, 9876 flow [2022-11-25 18:19:32,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9876, PETRI_PLACES=228, PETRI_TRANSITIONS=476} [2022-11-25 18:19:32,849 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 199 predicate places. [2022-11-25 18:19:32,849 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 476 transitions, 9876 flow [2022-11-25 18:19:32,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:32,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:32,850 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:32,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-25 18:19:33,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 18:19:33,056 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:33,057 INFO L85 PathProgramCache]: Analyzing trace with hash -65845022, now seen corresponding path program 12 times [2022-11-25 18:19:33,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:33,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451780386] [2022-11-25 18:19:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:33,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:33,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:33,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451780386] [2022-11-25 18:19:33,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451780386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:33,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447931817] [2022-11-25 18:19:33,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:19:33,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:33,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:33,472 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:33,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 18:19:33,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 18:19:33,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:19:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:33,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:33,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447931817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:33,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:33,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-11-25 18:19:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948216204] [2022-11-25 18:19:33,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:19:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:19:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:19:34,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:34,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 476 transitions, 9876 flow. Second operand has 22 states, 22 states have (on average 80.54545454545455) internal successors, (1772), 22 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:34,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:34,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:34,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:39,438 INFO L130 PetriNetUnfolder]: 2426/4956 cut-off events. [2022-11-25 18:19:39,438 INFO L131 PetriNetUnfolder]: For 312283/312283 co-relation queries the response was YES. [2022-11-25 18:19:39,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52288 conditions, 4956 events. 2426/4956 cut-off events. For 312283/312283 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39848 event pairs, 90 based on Foata normal form. 38/4994 useless extension candidates. Maximal degree in co-relation 52210. Up to 1357 conditions per place. [2022-11-25 18:19:39,519 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 337 selfloop transitions, 638 changer transitions 30/1005 dead transitions. [2022-11-25 18:19:39,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1005 transitions, 22060 flow [2022-11-25 18:19:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 18:19:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-25 18:19:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5068 transitions. [2022-11-25 18:19:39,529 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4469135802469136 [2022-11-25 18:19:39,529 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5068 transitions. [2022-11-25 18:19:39,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5068 transitions. [2022-11-25 18:19:39,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:39,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5068 transitions. [2022-11-25 18:19:39,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 84.46666666666667) internal successors, (5068), 60 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:39,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 189.0) internal successors, (11529), 61 states have internal predecessors, (11529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:39,560 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 189.0) internal successors, (11529), 61 states have internal predecessors, (11529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:39,560 INFO L175 Difference]: Start difference. First operand has 228 places, 476 transitions, 9876 flow. Second operand 60 states and 5068 transitions. [2022-11-25 18:19:39,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1005 transitions, 22060 flow [2022-11-25 18:19:41,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1005 transitions, 21159 flow, removed 391 selfloop flow, removed 10 redundant places. [2022-11-25 18:19:41,365 INFO L231 Difference]: Finished difference. Result has 295 places, 753 transitions, 17708 flow [2022-11-25 18:19:41,365 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=9206, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=17708, PETRI_PLACES=295, PETRI_TRANSITIONS=753} [2022-11-25 18:19:41,366 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 266 predicate places. [2022-11-25 18:19:41,366 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 753 transitions, 17708 flow [2022-11-25 18:19:41,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 80.54545454545455) internal successors, (1772), 22 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:41,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:41,367 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:41,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:41,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 18:19:41,568 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash -67034314, now seen corresponding path program 13 times [2022-11-25 18:19:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:41,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630969084] [2022-11-25 18:19:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:41,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:41,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:41,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630969084] [2022-11-25 18:19:41,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630969084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:41,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063749474] [2022-11-25 18:19:41,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:19:41,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:41,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:41,903 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:41,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 18:19:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:42,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:19:42,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:42,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:42,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063749474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:42,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:42,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-11-25 18:19:42,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857278655] [2022-11-25 18:19:42,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:42,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 18:19:42,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:42,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 18:19:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:19:42,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:42,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 753 transitions, 17708 flow. Second operand has 23 states, 23 states have (on average 80.47826086956522) internal successors, (1851), 23 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:42,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:42,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:42,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:47,738 INFO L130 PetriNetUnfolder]: 2387/4835 cut-off events. [2022-11-25 18:19:47,738 INFO L131 PetriNetUnfolder]: For 490758/490758 co-relation queries the response was YES. [2022-11-25 18:19:47,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55323 conditions, 4835 events. 2387/4835 cut-off events. For 490758/490758 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38290 event pairs, 202 based on Foata normal form. 108/4943 useless extension candidates. Maximal degree in co-relation 55228. Up to 1219 conditions per place. [2022-11-25 18:19:47,841 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 423 selfloop transitions, 521 changer transitions 5/949 dead transitions. [2022-11-25 18:19:47,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 949 transitions, 22208 flow [2022-11-25 18:19:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 18:19:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-25 18:19:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3740 transitions. [2022-11-25 18:19:47,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2022-11-25 18:19:47,847 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3740 transitions. [2022-11-25 18:19:47,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3740 transitions. [2022-11-25 18:19:47,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:47,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3740 transitions. [2022-11-25 18:19:47,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 85.0) internal successors, (3740), 44 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:47,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 189.0) internal successors, (8505), 45 states have internal predecessors, (8505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:47,864 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 189.0) internal successors, (8505), 45 states have internal predecessors, (8505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:47,864 INFO L175 Difference]: Start difference. First operand has 295 places, 753 transitions, 17708 flow. Second operand 44 states and 3740 transitions. [2022-11-25 18:19:47,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 949 transitions, 22208 flow [2022-11-25 18:19:50,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 949 transitions, 19842 flow, removed 1031 selfloop flow, removed 18 redundant places. [2022-11-25 18:19:50,857 INFO L231 Difference]: Finished difference. Result has 328 places, 755 transitions, 16780 flow [2022-11-25 18:19:50,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=14942, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16780, PETRI_PLACES=328, PETRI_TRANSITIONS=755} [2022-11-25 18:19:50,859 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 299 predicate places. [2022-11-25 18:19:50,859 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 755 transitions, 16780 flow [2022-11-25 18:19:50,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 80.47826086956522) internal successors, (1851), 23 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:50,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:50,860 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:50,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:51,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 18:19:51,066 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:19:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash 762354170, now seen corresponding path program 14 times [2022-11-25 18:19:51,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:51,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21426353] [2022-11-25 18:19:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:51,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:51,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:51,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21426353] [2022-11-25 18:19:51,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21426353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:51,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850842406] [2022-11-25 18:19:51,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:19:51,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:51,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:51,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:51,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 18:19:51,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:19:51,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:51,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:19:51,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:51,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:19:51,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850842406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:51,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:19:51,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 18:19:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775004620] [2022-11-25 18:19:51,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:19:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:19:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:19:51,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:19:51,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 755 transitions, 16780 flow. Second operand has 17 states, 17 states have (on average 80.76470588235294) internal successors, (1373), 17 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:51,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:51,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:19:51,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:56,730 INFO L130 PetriNetUnfolder]: 2553/5177 cut-off events. [2022-11-25 18:19:56,730 INFO L131 PetriNetUnfolder]: For 566163/566163 co-relation queries the response was YES. [2022-11-25 18:19:56,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58966 conditions, 5177 events. 2553/5177 cut-off events. For 566163/566163 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 41678 event pairs, 301 based on Foata normal form. 112/5289 useless extension candidates. Maximal degree in co-relation 58864. Up to 1938 conditions per place. [2022-11-25 18:19:56,819 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 627 selfloop transitions, 341 changer transitions 22/990 dead transitions. [2022-11-25 18:19:56,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 990 transitions, 22357 flow [2022-11-25 18:19:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 18:19:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-25 18:19:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2978 transitions. [2022-11-25 18:19:56,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45018896447467877 [2022-11-25 18:19:56,825 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2978 transitions. [2022-11-25 18:19:56,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2978 transitions. [2022-11-25 18:19:56,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:56,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2978 transitions. [2022-11-25 18:19:56,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 85.08571428571429) internal successors, (2978), 35 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:56,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 189.0) internal successors, (6804), 36 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:56,840 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 189.0) internal successors, (6804), 36 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:56,840 INFO L175 Difference]: Start difference. First operand has 328 places, 755 transitions, 16780 flow. Second operand 35 states and 2978 transitions. [2022-11-25 18:19:56,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 990 transitions, 22357 flow [2022-11-25 18:19:59,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 990 transitions, 21629 flow, removed 130 selfloop flow, removed 32 redundant places. [2022-11-25 18:20:00,010 INFO L231 Difference]: Finished difference. Result has 338 places, 805 transitions, 18527 flow [2022-11-25 18:20:00,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=16022, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18527, PETRI_PLACES=338, PETRI_TRANSITIONS=805} [2022-11-25 18:20:00,011 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 309 predicate places. [2022-11-25 18:20:00,011 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 805 transitions, 18527 flow [2022-11-25 18:20:00,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 80.76470588235294) internal successors, (1373), 17 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:00,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:00,012 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:00,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:00,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 18:20:00,217 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:20:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:00,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1969688164, now seen corresponding path program 15 times [2022-11-25 18:20:00,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:00,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117028596] [2022-11-25 18:20:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:00,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:00,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117028596] [2022-11-25 18:20:00,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117028596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:20:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020910582] [2022-11-25 18:20:00,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:20:00,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:00,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:20:00,479 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:20:00,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 18:20:00,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:20:00,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:20:00,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:20:00,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:00,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:20:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:00,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020910582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:20:00,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:20:00,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 18:20:00,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011470833] [2022-11-25 18:20:00,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:20:00,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:20:00,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:00,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:20:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:20:01,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:20:01,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 805 transitions, 18527 flow. Second operand has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:01,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:01,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:20:01,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:06,073 INFO L130 PetriNetUnfolder]: 3040/6136 cut-off events. [2022-11-25 18:20:06,073 INFO L131 PetriNetUnfolder]: For 725918/725918 co-relation queries the response was YES. [2022-11-25 18:20:06,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72803 conditions, 6136 events. 3040/6136 cut-off events. For 725918/725918 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 50734 event pairs, 938 based on Foata normal form. 70/6206 useless extension candidates. Maximal degree in co-relation 72698. Up to 3950 conditions per place. [2022-11-25 18:20:06,175 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 825 selfloop transitions, 315 changer transitions 1/1141 dead transitions. [2022-11-25 18:20:06,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1141 transitions, 26871 flow [2022-11-25 18:20:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 18:20:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-25 18:20:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3312 transitions. [2022-11-25 18:20:06,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44932844932844934 [2022-11-25 18:20:06,181 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3312 transitions. [2022-11-25 18:20:06,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3312 transitions. [2022-11-25 18:20:06,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:06,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3312 transitions. [2022-11-25 18:20:06,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 84.92307692307692) internal successors, (3312), 39 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:06,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 189.0) internal successors, (7560), 40 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:06,196 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 189.0) internal successors, (7560), 40 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:06,196 INFO L175 Difference]: Start difference. First operand has 338 places, 805 transitions, 18527 flow. Second operand 39 states and 3312 transitions. [2022-11-25 18:20:06,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1141 transitions, 26871 flow [2022-11-25 18:20:11,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1141 transitions, 26422 flow, removed 158 selfloop flow, removed 15 redundant places. [2022-11-25 18:20:11,038 INFO L231 Difference]: Finished difference. Result has 377 places, 935 transitions, 22757 flow [2022-11-25 18:20:11,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=18145, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=22757, PETRI_PLACES=377, PETRI_TRANSITIONS=935} [2022-11-25 18:20:11,039 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 348 predicate places. [2022-11-25 18:20:11,039 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 935 transitions, 22757 flow [2022-11-25 18:20:11,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:11,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:11,040 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:11,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:11,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:11,241 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:20:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 191749724, now seen corresponding path program 16 times [2022-11-25 18:20:11,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:11,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045576164] [2022-11-25 18:20:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:11,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:11,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:11,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045576164] [2022-11-25 18:20:11,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045576164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:20:11,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869582302] [2022-11-25 18:20:11,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:20:11,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:11,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:20:11,459 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:20:11,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 18:20:11,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:20:11,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:20:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:20:11,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:11,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:20:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:11,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869582302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:20:11,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:20:11,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-25 18:20:11,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681350925] [2022-11-25 18:20:11,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:20:11,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:20:11,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:20:11,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:20:12,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:20:12,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 935 transitions, 22757 flow. Second operand has 18 states, 18 states have (on average 80.77777777777777) internal successors, (1454), 18 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:12,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:12,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:20:12,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:18,830 INFO L130 PetriNetUnfolder]: 3423/6921 cut-off events. [2022-11-25 18:20:18,831 INFO L131 PetriNetUnfolder]: For 977013/977013 co-relation queries the response was YES. [2022-11-25 18:20:18,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86981 conditions, 6921 events. 3423/6921 cut-off events. For 977013/977013 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 58756 event pairs, 964 based on Foata normal form. 90/7011 useless extension candidates. Maximal degree in co-relation 86862. Up to 4362 conditions per place. [2022-11-25 18:20:18,939 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 762 selfloop transitions, 430 changer transitions 29/1221 dead transitions. [2022-11-25 18:20:18,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1221 transitions, 30617 flow [2022-11-25 18:20:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 18:20:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-25 18:20:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3459 transitions. [2022-11-25 18:20:18,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44638017808749514 [2022-11-25 18:20:18,945 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3459 transitions. [2022-11-25 18:20:18,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3459 transitions. [2022-11-25 18:20:18,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:18,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3459 transitions. [2022-11-25 18:20:18,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 84.36585365853658) internal successors, (3459), 41 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:18,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 189.0) internal successors, (7938), 42 states have internal predecessors, (7938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:18,961 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 189.0) internal successors, (7938), 42 states have internal predecessors, (7938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:18,961 INFO L175 Difference]: Start difference. First operand has 377 places, 935 transitions, 22757 flow. Second operand 41 states and 3459 transitions. [2022-11-25 18:20:18,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1221 transitions, 30617 flow [2022-11-25 18:20:25,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 1221 transitions, 29358 flow, removed 344 selfloop flow, removed 13 redundant places. [2022-11-25 18:20:25,245 INFO L231 Difference]: Finished difference. Result has 417 places, 1028 transitions, 25826 flow [2022-11-25 18:20:25,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=21570, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=25826, PETRI_PLACES=417, PETRI_TRANSITIONS=1028} [2022-11-25 18:20:25,246 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 388 predicate places. [2022-11-25 18:20:25,246 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1028 transitions, 25826 flow [2022-11-25 18:20:25,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 80.77777777777777) internal successors, (1454), 18 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:25,246 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:25,246 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:25,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:25,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 18:20:25,447 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:20:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash -903384436, now seen corresponding path program 17 times [2022-11-25 18:20:25,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:25,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332796304] [2022-11-25 18:20:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:25,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:25,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332796304] [2022-11-25 18:20:25,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332796304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:20:25,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798608172] [2022-11-25 18:20:25,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:20:25,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:25,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:20:25,651 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:20:25,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 18:20:25,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:20:25,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:20:25,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:20:25,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:25,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:20:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:25,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798608172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:20:25,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:20:25,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 18:20:25,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399263626] [2022-11-25 18:20:25,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:20:25,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:20:25,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:20:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:20:26,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:20:26,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1028 transitions, 25826 flow. Second operand has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:26,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:26,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:20:26,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:32,316 INFO L130 PetriNetUnfolder]: 3779/7567 cut-off events. [2022-11-25 18:20:32,316 INFO L131 PetriNetUnfolder]: For 1243435/1243435 co-relation queries the response was YES. [2022-11-25 18:20:32,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97166 conditions, 7567 events. 3779/7567 cut-off events. For 1243435/1243435 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 64449 event pairs, 1461 based on Foata normal form. 162/7729 useless extension candidates. Maximal degree in co-relation 97038. Up to 6264 conditions per place. [2022-11-25 18:20:32,499 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 1053 selfloop transitions, 266 changer transitions 3/1322 dead transitions. [2022-11-25 18:20:32,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1322 transitions, 34140 flow [2022-11-25 18:20:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 18:20:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 18:20:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3061 transitions. [2022-11-25 18:20:32,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44988242210464435 [2022-11-25 18:20:32,505 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3061 transitions. [2022-11-25 18:20:32,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3061 transitions. [2022-11-25 18:20:32,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:32,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3061 transitions. [2022-11-25 18:20:32,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 85.02777777777777) internal successors, (3061), 36 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:32,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 189.0) internal successors, (6993), 37 states have internal predecessors, (6993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:32,518 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 189.0) internal successors, (6993), 37 states have internal predecessors, (6993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:32,518 INFO L175 Difference]: Start difference. First operand has 417 places, 1028 transitions, 25826 flow. Second operand 36 states and 3061 transitions. [2022-11-25 18:20:32,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1322 transitions, 34140 flow [2022-11-25 18:20:40,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1322 transitions, 33593 flow, removed 221 selfloop flow, removed 19 redundant places. [2022-11-25 18:20:40,753 INFO L231 Difference]: Finished difference. Result has 449 places, 1139 transitions, 29480 flow [2022-11-25 18:20:40,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=25376, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=29480, PETRI_PLACES=449, PETRI_TRANSITIONS=1139} [2022-11-25 18:20:40,755 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 420 predicate places. [2022-11-25 18:20:40,755 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1139 transitions, 29480 flow [2022-11-25 18:20:40,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:40,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:40,756 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:40,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:40,962 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:20:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash 29918176, now seen corresponding path program 18 times [2022-11-25 18:20:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:40,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460339839] [2022-11-25 18:20:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:41,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:41,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460339839] [2022-11-25 18:20:41,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460339839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:20:41,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505142644] [2022-11-25 18:20:41,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:20:41,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:41,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:20:41,168 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:20:41,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 18:20:41,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:20:41,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:20:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:20:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:41,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:20:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:41,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505142644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:20:41,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:20:41,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 18:20:41,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319213423] [2022-11-25 18:20:41,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:20:41,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:20:41,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:41,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:20:41,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:20:41,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:20:41,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1139 transitions, 29480 flow. Second operand has 17 states, 17 states have (on average 80.88235294117646) internal successors, (1375), 17 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:41,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:41,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:20:41,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:43,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 18:20:45,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 18:20:47,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 18:20:54,588 INFO L130 PetriNetUnfolder]: 3996/8021 cut-off events. [2022-11-25 18:20:54,588 INFO L131 PetriNetUnfolder]: For 1308240/1308240 co-relation queries the response was YES. [2022-11-25 18:20:54,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106406 conditions, 8021 events. 3996/8021 cut-off events. For 1308240/1308240 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 69167 event pairs, 1435 based on Foata normal form. 70/8091 useless extension candidates. Maximal degree in co-relation 106264. Up to 6242 conditions per place. [2022-11-25 18:20:54,720 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 1010 selfloop transitions, 310 changer transitions 27/1347 dead transitions. [2022-11-25 18:20:54,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1347 transitions, 36211 flow [2022-11-25 18:20:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 18:20:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 18:20:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2298 transitions. [2022-11-25 18:20:54,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4503233392122281 [2022-11-25 18:20:54,724 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2298 transitions. [2022-11-25 18:20:54,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2298 transitions. [2022-11-25 18:20:54,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:54,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2298 transitions. [2022-11-25 18:20:54,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 85.11111111111111) internal successors, (2298), 27 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:54,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 189.0) internal successors, (5292), 28 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:54,733 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 189.0) internal successors, (5292), 28 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:54,734 INFO L175 Difference]: Start difference. First operand has 449 places, 1139 transitions, 29480 flow. Second operand 27 states and 2298 transitions. [2022-11-25 18:20:54,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1347 transitions, 36211 flow [2022-11-25 18:21:04,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1347 transitions, 34979 flow, removed 536 selfloop flow, removed 14 redundant places. [2022-11-25 18:21:04,411 INFO L231 Difference]: Finished difference. Result has 470 places, 1197 transitions, 31048 flow [2022-11-25 18:21:04,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=28259, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=31048, PETRI_PLACES=470, PETRI_TRANSITIONS=1197} [2022-11-25 18:21:04,413 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 441 predicate places. [2022-11-25 18:21:04,414 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 1197 transitions, 31048 flow [2022-11-25 18:21:04,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 80.88235294117646) internal successors, (1375), 17 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:04,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:04,414 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:04,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:04,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 18:21:04,621 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:21:04,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:04,621 INFO L85 PathProgramCache]: Analyzing trace with hash -3112336, now seen corresponding path program 19 times [2022-11-25 18:21:04,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:04,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544941983] [2022-11-25 18:21:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:04,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:04,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:04,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544941983] [2022-11-25 18:21:04,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544941983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:21:04,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143504236] [2022-11-25 18:21:04,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:21:04,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:04,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:04,812 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:04,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 18:21:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:04,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:21:04,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:04,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:21:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:05,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143504236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:21:05,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:21:05,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 18:21:05,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802675317] [2022-11-25 18:21:05,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:21:05,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:21:05,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:05,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:21:05,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:21:05,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:21:05,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 1197 transitions, 31048 flow. Second operand has 16 states, 16 states have (on average 80.8125) internal successors, (1293), 16 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:05,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:05,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:21:05,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:21:12,709 INFO L130 PetriNetUnfolder]: 4179/8356 cut-off events. [2022-11-25 18:21:12,709 INFO L131 PetriNetUnfolder]: For 1625717/1625717 co-relation queries the response was YES. [2022-11-25 18:21:12,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111290 conditions, 8356 events. 4179/8356 cut-off events. For 1625717/1625717 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 72262 event pairs, 1717 based on Foata normal form. 156/8512 useless extension candidates. Maximal degree in co-relation 111138. Up to 7505 conditions per place. [2022-11-25 18:21:12,901 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 1222 selfloop transitions, 192 changer transitions 4/1418 dead transitions. [2022-11-25 18:21:12,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1418 transitions, 37526 flow [2022-11-25 18:21:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 18:21:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 18:21:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3052 transitions. [2022-11-25 18:21:12,907 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.448559670781893 [2022-11-25 18:21:12,907 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3052 transitions. [2022-11-25 18:21:12,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3052 transitions. [2022-11-25 18:21:12,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:21:12,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3052 transitions. [2022-11-25 18:21:12,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 84.77777777777777) internal successors, (3052), 36 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:12,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 189.0) internal successors, (6993), 37 states have internal predecessors, (6993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:12,921 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 189.0) internal successors, (6993), 37 states have internal predecessors, (6993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:12,921 INFO L175 Difference]: Start difference. First operand has 470 places, 1197 transitions, 31048 flow. Second operand 36 states and 3052 transitions. [2022-11-25 18:21:12,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1418 transitions, 37526 flow [2022-11-25 18:21:23,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 1418 transitions, 37174 flow, removed 98 selfloop flow, removed 13 redundant places. [2022-11-25 18:21:23,711 INFO L231 Difference]: Finished difference. Result has 507 places, 1279 transitions, 33309 flow [2022-11-25 18:21:23,712 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=30704, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1062, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=33309, PETRI_PLACES=507, PETRI_TRANSITIONS=1279} [2022-11-25 18:21:23,713 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 478 predicate places. [2022-11-25 18:21:23,713 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1279 transitions, 33309 flow [2022-11-25 18:21:23,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.8125) internal successors, (1293), 16 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:23,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:23,713 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:23,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:23,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:23,914 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:21:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:23,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1603121488, now seen corresponding path program 20 times [2022-11-25 18:21:23,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:23,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439247259] [2022-11-25 18:21:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:23,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:24,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439247259] [2022-11-25 18:21:24,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439247259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:21:24,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298052126] [2022-11-25 18:21:24,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:21:24,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:24,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:24,275 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:24,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 18:21:24,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:21:24,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:21:24,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:21:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:24,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:21:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:24,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298052126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:21:24,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:21:24,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-25 18:21:24,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225076888] [2022-11-25 18:21:24,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:21:24,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:21:24,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:21:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:21:24,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:21:24,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1279 transitions, 33309 flow. Second operand has 21 states, 21 states have (on average 80.61904761904762) internal successors, (1693), 21 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:24,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:24,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:21:24,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:21:37,030 INFO L130 PetriNetUnfolder]: 4652/9433 cut-off events. [2022-11-25 18:21:37,030 INFO L131 PetriNetUnfolder]: For 2127187/2127187 co-relation queries the response was YES. [2022-11-25 18:21:37,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133330 conditions, 9433 events. 4652/9433 cut-off events. For 2127187/2127187 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 84543 event pairs, 885 based on Foata normal form. 66/9499 useless extension candidates. Maximal degree in co-relation 133162. Up to 3442 conditions per place. [2022-11-25 18:21:37,242 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 697 selfloop transitions, 902 changer transitions 18/1617 dead transitions. [2022-11-25 18:21:37,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1617 transitions, 44512 flow [2022-11-25 18:21:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 18:21:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 18:21:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2922 transitions. [2022-11-25 18:21:37,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45471521942110177 [2022-11-25 18:21:37,248 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2922 transitions. [2022-11-25 18:21:37,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2922 transitions. [2022-11-25 18:21:37,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:21:37,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2922 transitions. [2022-11-25 18:21:37,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 85.94117647058823) internal successors, (2922), 34 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:37,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 189.0) internal successors, (6615), 35 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:37,431 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 189.0) internal successors, (6615), 35 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:37,431 INFO L175 Difference]: Start difference. First operand has 507 places, 1279 transitions, 33309 flow. Second operand 34 states and 2922 transitions. [2022-11-25 18:21:37,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1617 transitions, 44512 flow [2022-11-25 18:21:52,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 1617 transitions, 42980 flow, removed 694 selfloop flow, removed 11 redundant places. [2022-11-25 18:21:52,763 INFO L231 Difference]: Finished difference. Result has 544 places, 1404 transitions, 38749 flow [2022-11-25 18:21:52,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=32066, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=38749, PETRI_PLACES=544, PETRI_TRANSITIONS=1404} [2022-11-25 18:21:52,764 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 515 predicate places. [2022-11-25 18:21:52,764 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1404 transitions, 38749 flow [2022-11-25 18:21:52,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.61904761904762) internal successors, (1693), 21 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:52,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:21:52,765 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:52,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:52,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-25 18:21:52,966 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:21:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1576014026, now seen corresponding path program 21 times [2022-11-25 18:21:52,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:52,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187830840] [2022-11-25 18:21:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:52,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:53,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:53,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187830840] [2022-11-25 18:21:53,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187830840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:21:53,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208898545] [2022-11-25 18:21:53,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:21:53,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:53,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:53,229 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:53,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 18:21:53,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 18:21:53,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:21:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:21:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:53,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:21:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:53,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208898545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:21:53,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:21:53,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-25 18:21:53,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383280324] [2022-11-25 18:21:53,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:21:53,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:21:53,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:53,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:21:53,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:21:53,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:21:53,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1404 transitions, 38749 flow. Second operand has 21 states, 21 states have (on average 80.57142857142857) internal successors, (1692), 21 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:53,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:21:53,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:21:53,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:22:06,526 INFO L130 PetriNetUnfolder]: 4638/9381 cut-off events. [2022-11-25 18:22:06,526 INFO L131 PetriNetUnfolder]: For 2275543/2275543 co-relation queries the response was YES. [2022-11-25 18:22:06,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141496 conditions, 9381 events. 4638/9381 cut-off events. For 2275543/2275543 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 83873 event pairs, 358 based on Foata normal form. 22/9403 useless extension candidates. Maximal degree in co-relation 141314. Up to 2788 conditions per place. [2022-11-25 18:22:06,863 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 502 selfloop transitions, 1087 changer transitions 23/1612 dead transitions. [2022-11-25 18:22:06,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 1612 transitions, 46814 flow [2022-11-25 18:22:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 18:22:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-25 18:22:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4433 transitions. [2022-11-25 18:22:06,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4425476689627633 [2022-11-25 18:22:06,868 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4433 transitions. [2022-11-25 18:22:06,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4433 transitions. [2022-11-25 18:22:06,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:22:06,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4433 transitions. [2022-11-25 18:22:06,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 83.64150943396227) internal successors, (4433), 53 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:06,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 189.0) internal successors, (10206), 54 states have internal predecessors, (10206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:06,885 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 189.0) internal successors, (10206), 54 states have internal predecessors, (10206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:06,886 INFO L175 Difference]: Start difference. First operand has 544 places, 1404 transitions, 38749 flow. Second operand 53 states and 4433 transitions. [2022-11-25 18:22:06,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 1612 transitions, 46814 flow [2022-11-25 18:22:25,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 1612 transitions, 45988 flow, removed 373 selfloop flow, removed 11 redundant places. [2022-11-25 18:22:25,546 INFO L231 Difference]: Finished difference. Result has 592 places, 1451 transitions, 42354 flow [2022-11-25 18:22:25,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=37967, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=42354, PETRI_PLACES=592, PETRI_TRANSITIONS=1451} [2022-11-25 18:22:25,547 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 563 predicate places. [2022-11-25 18:22:25,547 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1451 transitions, 42354 flow [2022-11-25 18:22:25,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.57142857142857) internal successors, (1692), 21 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:25,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:22:25,548 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:22:25,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:25,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 18:22:25,750 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:22:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1000271882, now seen corresponding path program 22 times [2022-11-25 18:22:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:25,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716809854] [2022-11-25 18:22:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:22:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716809854] [2022-11-25 18:22:25,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716809854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:22:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250145121] [2022-11-25 18:22:25,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:22:25,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:25,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:25,919 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:22:25,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5f75ee-227f-4993-a480-7624a363e55b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 18:22:26,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:22:26,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:22:26,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:22:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:26,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:22:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:26,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250145121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:22:26,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:22:26,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 18:22:26,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248215015] [2022-11-25 18:22:26,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:22:26,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:22:26,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:22:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:22:26,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:22:26,437 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 189 [2022-11-25 18:22:26,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1451 transitions, 42354 flow. Second operand has 17 states, 17 states have (on average 80.82352941176471) internal successors, (1374), 17 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:26,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:22:26,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 189 [2022-11-25 18:22:26,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand