./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:06,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:06,581 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:50:06,587 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:06,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:06,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:06,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:06,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:06,618 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:06,618 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:06,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:06,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:06,620 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:06,621 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:06,622 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:06,622 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:06,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:06,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:06,624 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:50:06,624 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:50:06,625 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:50:06,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:06,626 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:50:06,626 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:50:06,627 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:06,627 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:06,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:06,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:06,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:06,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:06,630 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:06,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:06,630 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:06,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:06,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:06,632 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:06,632 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:06,633 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:06,633 INFO L153 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_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2023-11-19 07:50:06,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:06,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:06,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:06,933 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:06,933 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:06,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-19 07:50:10,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:10,314 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:10,314 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-19 07:50:10,325 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/data/11e5be750/699263169a164aaf88a9d9b62d99c151/FLAGda502fa27 [2023-11-19 07:50:10,350 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/data/11e5be750/699263169a164aaf88a9d9b62d99c151 [2023-11-19 07:50:10,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:10,362 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:10,399 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:10,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:10,407 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:10,408 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,409 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cefa84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10, skipping insertion in model container [2023-11-19 07:50:10,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,434 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:10,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:10,681 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:10,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:10,715 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:50:10,715 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:50:10,721 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:10,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10 WrapperNode [2023-11-19 07:50:10,722 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:10,723 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:10,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:10,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:10,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,738 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,759 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2023-11-19 07:50:10,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:10,761 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:10,761 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:10,761 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:10,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,801 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,804 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:10,805 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:10,806 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:10,806 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:10,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:10,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:10,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:10,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:50:10,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:50:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:50:10,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:50:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:50:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:50:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:50:10,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:50:10,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:10,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:10,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:50:10,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:50:10,906 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:50:10,998 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:11,001 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:11,283 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:11,378 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:11,379 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:50:11,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:11 BoogieIcfgContainer [2023-11-19 07:50:11,384 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:11,387 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:11,387 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:11,391 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:11,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:10" (1/3) ... [2023-11-19 07:50:11,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@982c40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:11, skipping insertion in model container [2023-11-19 07:50:11,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10" (2/3) ... [2023-11-19 07:50:11,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@982c40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:11, skipping insertion in model container [2023-11-19 07:50:11,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:11" (3/3) ... [2023-11-19 07:50:11,394 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-19 07:50:11,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:11,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 07:50:11,417 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:50:11,493 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:50:11,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 102 transitions, 218 flow [2023-11-19 07:50:11,676 INFO L124 PetriNetUnfolderBase]: 6/100 cut-off events. [2023-11-19 07:50:11,677 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:11,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 6/100 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. 0/84 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-19 07:50:11,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 102 transitions, 218 flow [2023-11-19 07:50:11,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 95 transitions, 202 flow [2023-11-19 07:50:11,692 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:11,702 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 95 transitions, 202 flow [2023-11-19 07:50:11,705 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 95 transitions, 202 flow [2023-11-19 07:50:11,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 202 flow [2023-11-19 07:50:11,736 INFO L124 PetriNetUnfolderBase]: 6/95 cut-off events. [2023-11-19 07:50:11,736 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:11,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 95 events. 6/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-19 07:50:11,740 INFO L119 LiptonReduction]: Number of co-enabled transitions 664 [2023-11-19 07:50:15,551 INFO L134 LiptonReduction]: Checked pairs total: 745 [2023-11-19 07:50:15,552 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-11-19 07:50:15,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:15,575 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;@53629c6d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:15,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-19 07:50:15,577 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:15,578 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:50:15,578 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:15,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:15,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:50:15,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:50:15,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash 408, now seen corresponding path program 1 times [2023-11-19 07:50:15,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:15,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932982210] [2023-11-19 07:50:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:15,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:15,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932982210] [2023-11-19 07:50:15,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932982210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:15,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:15,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:50:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142224560] [2023-11-19 07:50:15,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:15,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:15,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:15,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:15,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 200 [2023-11-19 07:50:15,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:15,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:15,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 200 [2023-11-19 07:50:15,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:15,822 INFO L124 PetriNetUnfolderBase]: 88/151 cut-off events. [2023-11-19 07:50:15,823 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-19 07:50:15,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 151 events. 88/151 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 381 event pairs, 56 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 252. Up to 152 conditions per place. [2023-11-19 07:50:15,828 INFO L140 encePairwiseOnDemand]: 197/200 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-19 07:50:15,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 96 flow [2023-11-19 07:50:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:50:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 206 transitions. [2023-11-19 07:50:15,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2023-11-19 07:50:15,847 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 206 transitions. [2023-11-19 07:50:15,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 206 transitions. [2023-11-19 07:50:15,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:15,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 206 transitions. [2023-11-19 07:50:15,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 103.0) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:15,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:15,872 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:15,874 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 206 transitions. [2023-11-19 07:50:15,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 96 flow [2023-11-19 07:50:15,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:50:15,881 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-19 07:50:15,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, 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} [2023-11-19 07:50:15,888 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-19 07:50:15,888 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-19 07:50:15,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:15,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:15,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:50:15,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:50:15,890 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)] === [2023-11-19 07:50:15,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash 400106, now seen corresponding path program 1 times [2023-11-19 07:50:15,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:15,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148402268] [2023-11-19 07:50:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:16,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148402268] [2023-11-19 07:50:16,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148402268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:16,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:16,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:16,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908432817] [2023-11-19 07:50:16,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:16,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:16,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 200 [2023-11-19 07:50:16,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 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) [2023-11-19 07:50:16,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:16,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 200 [2023-11-19 07:50:16,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:16,360 INFO L124 PetriNetUnfolderBase]: 82/139 cut-off events. [2023-11-19 07:50:16,360 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:16,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 139 events. 82/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 339 event pairs, 52 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 282. Up to 139 conditions per place. [2023-11-19 07:50:16,365 INFO L140 encePairwiseOnDemand]: 197/200 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-19 07:50:16,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 80 flow [2023-11-19 07:50:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2023-11-19 07:50:16,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-11-19 07:50:16,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2023-11-19 07:50:16,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2023-11-19 07:50:16,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:16,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2023-11-19 07:50:16,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,385 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 276 transitions. [2023-11-19 07:50:16,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 80 flow [2023-11-19 07:50:16,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:16,390 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-19 07:50:16,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, 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} [2023-11-19 07:50:16,392 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-19 07:50:16,392 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-19 07:50:16,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-19 07:50:16,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:16,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:50:16,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:50:16,400 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)] === [2023-11-19 07:50:16,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash 400105, now seen corresponding path program 1 times [2023-11-19 07:50:16,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:16,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220009827] [2023-11-19 07:50:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:16,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:16,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:16,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220009827] [2023-11-19 07:50:16,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220009827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:16,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:16,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:16,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761066415] [2023-11-19 07:50:16,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:16,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:16,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:16,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 200 [2023-11-19 07:50:16,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:16,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 200 [2023-11-19 07:50:16,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:16,601 INFO L124 PetriNetUnfolderBase]: 76/127 cut-off events. [2023-11-19 07:50:16,602 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:16,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 127 events. 76/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 292 event pairs, 48 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 259. Up to 127 conditions per place. [2023-11-19 07:50:16,603 INFO L140 encePairwiseOnDemand]: 197/200 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-19 07:50:16,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-11-19 07:50:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-11-19 07:50:16,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43666666666666665 [2023-11-19 07:50:16,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-11-19 07:50:16,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-11-19 07:50:16,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:16,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-11-19 07:50:16,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,610 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 262 transitions. [2023-11-19 07:50:16,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-11-19 07:50:16,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:16,612 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-19 07:50:16,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, 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} [2023-11-19 07:50:16,613 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 07:50:16,613 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-19 07:50:16,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:16,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:16,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:50:16,615 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)] === [2023-11-19 07:50:16,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:16,615 INFO L85 PathProgramCache]: Analyzing trace with hash 384508842, now seen corresponding path program 1 times [2023-11-19 07:50:16,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:16,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590851757] [2023-11-19 07:50:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:16,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:16,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:16,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590851757] [2023-11-19 07:50:16,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590851757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:16,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:16,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:16,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595230394] [2023-11-19 07:50:16,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:16,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:16,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:16,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 200 [2023-11-19 07:50:16,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:16,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 200 [2023-11-19 07:50:16,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:16,868 INFO L124 PetriNetUnfolderBase]: 58/100 cut-off events. [2023-11-19 07:50:16,868 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:16,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 100 events. 58/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 36 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 206. Up to 100 conditions per place. [2023-11-19 07:50:16,870 INFO L140 encePairwiseOnDemand]: 198/200 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-19 07:50:16,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 71 flow [2023-11-19 07:50:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-11-19 07:50:16,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44333333333333336 [2023-11-19 07:50:16,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-11-19 07:50:16,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-11-19 07:50:16,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:16,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-11-19 07:50:16,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,876 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 266 transitions. [2023-11-19 07:50:16,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 71 flow [2023-11-19 07:50:16,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:16,877 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-19 07:50:16,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, 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} [2023-11-19 07:50:16,878 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 07:50:16,878 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-19 07:50:16,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:16,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:50:16,880 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)] === [2023-11-19 07:50:16,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash 384508841, now seen corresponding path program 1 times [2023-11-19 07:50:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086481103] [2023-11-19 07:50:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:16,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086481103] [2023-11-19 07:50:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086481103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:16,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651282265] [2023-11-19 07:50:16,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:16,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:16,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:16,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:17,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 200 [2023-11-19 07:50:17,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:17,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 200 [2023-11-19 07:50:17,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:17,061 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-11-19 07:50:17,061 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:17,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 73 events. 40/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 24 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 153. Up to 73 conditions per place. [2023-11-19 07:50:17,063 INFO L140 encePairwiseOnDemand]: 198/200 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-19 07:50:17,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 68 flow [2023-11-19 07:50:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-11-19 07:50:17,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116666666666667 [2023-11-19 07:50:17,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-11-19 07:50:17,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-11-19 07:50:17,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:17,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-11-19 07:50:17,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,069 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 247 transitions. [2023-11-19 07:50:17,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 68 flow [2023-11-19 07:50:17,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:17,071 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-19 07:50:17,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, 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} [2023-11-19 07:50:17,072 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 07:50:17,072 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-19 07:50:17,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:17,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:17,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:50:17,073 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)] === [2023-11-19 07:50:17,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:17,074 INFO L85 PathProgramCache]: Analyzing trace with hash -895089518, now seen corresponding path program 1 times [2023-11-19 07:50:17,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:17,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717796339] [2023-11-19 07:50:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:17,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:17,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:17,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717796339] [2023-11-19 07:50:17,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717796339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:17,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:17,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856157260] [2023-11-19 07:50:17,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:17,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:17,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:17,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 200 [2023-11-19 07:50:17,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:17,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 200 [2023-11-19 07:50:17,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:17,228 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-19 07:50:17,228 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:17,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 92 events. 51/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 198 event pairs, 24 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 193. Up to 73 conditions per place. [2023-11-19 07:50:17,229 INFO L140 encePairwiseOnDemand]: 196/200 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-19 07:50:17,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 98 flow [2023-11-19 07:50:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:50:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 363 transitions. [2023-11-19 07:50:17,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45375 [2023-11-19 07:50:17,232 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 363 transitions. [2023-11-19 07:50:17,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 363 transitions. [2023-11-19 07:50:17,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:17,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 363 transitions. [2023-11-19 07:50:17,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,236 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,237 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 363 transitions. [2023-11-19 07:50:17,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 98 flow [2023-11-19 07:50:17,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 97 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:17,238 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-11-19 07:50:17,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-11-19 07:50:17,239 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-11-19 07:50:17,239 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-11-19 07:50:17,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:17,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:50:17,240 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)] === [2023-11-19 07:50:17,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash -817705830, now seen corresponding path program 1 times [2023-11-19 07:50:17,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:17,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024051810] [2023-11-19 07:50:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:50:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024051810] [2023-11-19 07:50:17,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024051810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:17,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:17,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:17,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436865951] [2023-11-19 07:50:17,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:17,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:17,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:17,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:17,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:17,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 200 [2023-11-19 07:50:17,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:17,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 200 [2023-11-19 07:50:17,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:17,395 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-19 07:50:17,395 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:50:17,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 116 events. 65/116 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 250 event pairs, 33 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 292. Up to 92 conditions per place. [2023-11-19 07:50:17,397 INFO L140 encePairwiseOnDemand]: 196/200 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-19 07:50:17,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 127 flow [2023-11-19 07:50:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:50:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2023-11-19 07:50:17,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46375 [2023-11-19 07:50:17,401 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2023-11-19 07:50:17,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2023-11-19 07:50:17,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:17,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2023-11-19 07:50:17,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,406 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,406 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 4 states and 371 transitions. [2023-11-19 07:50:17,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 127 flow [2023-11-19 07:50:17,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 117 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:50:17,408 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 60 flow [2023-11-19 07:50:17,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=46, 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=4, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-19 07:50:17,409 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-19 07:50:17,409 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 60 flow [2023-11-19 07:50:17,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:17,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:17,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:50:17,410 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)] === [2023-11-19 07:50:17,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash 224000364, now seen corresponding path program 1 times [2023-11-19 07:50:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:17,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314853128] [2023-11-19 07:50:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:17,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:17,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314853128] [2023-11-19 07:50:17,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314853128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626323988] [2023-11-19 07:50:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:17,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:17,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:17,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:17,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:50:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:17,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:17,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:18,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:18,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626323988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:18,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:18,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 07:50:18,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130940547] [2023-11-19 07:50:18,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:18,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:50:18,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:50:18,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:50:19,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:19,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 60 flow. Second operand has 21 states, 21 states have (on average 79.85714285714286) internal successors, (1677), 21 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:19,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:19,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:20,004 INFO L124 PetriNetUnfolderBase]: 167/324 cut-off events. [2023-11-19 07:50:20,005 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-11-19 07:50:20,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 324 events. 167/324 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1257 event pairs, 20 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 886. Up to 107 conditions per place. [2023-11-19 07:50:20,009 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 66 selfloop transitions, 30 changer transitions 29/125 dead transitions. [2023-11-19 07:50:20,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 125 transitions, 646 flow [2023-11-19 07:50:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:50:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:50:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1760 transitions. [2023-11-19 07:50:20,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2023-11-19 07:50:20,018 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1760 transitions. [2023-11-19 07:50:20,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1760 transitions. [2023-11-19 07:50:20,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:20,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1760 transitions. [2023-11-19 07:50:20,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.80952380952381) internal successors, (1760), 21 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:20,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:20,037 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:20,038 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 60 flow. Second operand 21 states and 1760 transitions. [2023-11-19 07:50:20,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 125 transitions, 646 flow [2023-11-19 07:50:20,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 125 transitions, 615 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-19 07:50:20,042 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 285 flow [2023-11-19 07:50:20,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=285, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-19 07:50:20,043 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2023-11-19 07:50:20,044 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 285 flow [2023-11-19 07:50:20,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 79.85714285714286) internal successors, (1677), 21 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:20,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:20,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:20,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:20,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:50:20,267 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)] === [2023-11-19 07:50:20,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:20,268 INFO L85 PathProgramCache]: Analyzing trace with hash -99515834, now seen corresponding path program 2 times [2023-11-19 07:50:20,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:20,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135557961] [2023-11-19 07:50:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:20,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:20,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:20,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135557961] [2023-11-19 07:50:20,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135557961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:20,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192676174] [2023-11-19 07:50:20,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:20,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:20,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:20,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:20,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:50:20,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:20,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:20,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:20,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:20,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:21,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192676174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:21,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:21,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 07:50:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409560621] [2023-11-19 07:50:21,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:21,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:50:21,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:50:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:50:21,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:21,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 285 flow. Second operand has 21 states, 21 states have (on average 79.76190476190476) internal successors, (1675), 21 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:21,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:21,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:21,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:22,725 INFO L124 PetriNetUnfolderBase]: 187/389 cut-off events. [2023-11-19 07:50:22,725 INFO L125 PetriNetUnfolderBase]: For 843/843 co-relation queries the response was YES. [2023-11-19 07:50:22,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1534 conditions, 389 events. 187/389 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1717 event pairs, 22 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 1518. Up to 135 conditions per place. [2023-11-19 07:50:22,730 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 79 selfloop transitions, 44 changer transitions 15/138 dead transitions. [2023-11-19 07:50:22,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 138 transitions, 978 flow [2023-11-19 07:50:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:50:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 07:50:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1837 transitions. [2023-11-19 07:50:22,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2023-11-19 07:50:22,738 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1837 transitions. [2023-11-19 07:50:22,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1837 transitions. [2023-11-19 07:50:22,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:22,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1837 transitions. [2023-11-19 07:50:22,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 83.5) internal successors, (1837), 22 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:22,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 200.0) internal successors, (4600), 23 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:22,757 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 200.0) internal successors, (4600), 23 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:22,757 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 285 flow. Second operand 22 states and 1837 transitions. [2023-11-19 07:50:22,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 138 transitions, 978 flow [2023-11-19 07:50:22,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 138 transitions, 864 flow, removed 49 selfloop flow, removed 5 redundant places. [2023-11-19 07:50:22,768 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 465 flow [2023-11-19 07:50:22,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=465, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-11-19 07:50:22,769 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2023-11-19 07:50:22,770 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 465 flow [2023-11-19 07:50:22,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 79.76190476190476) internal successors, (1675), 21 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:22,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:22,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:22,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:22,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:22,992 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)] === [2023-11-19 07:50:22,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:22,993 INFO L85 PathProgramCache]: Analyzing trace with hash 454525404, now seen corresponding path program 3 times [2023-11-19 07:50:22,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:22,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123962799] [2023-11-19 07:50:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:22,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:23,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:23,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123962799] [2023-11-19 07:50:23,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123962799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:23,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902534231] [2023-11-19 07:50:23,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:50:23,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:23,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:23,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:50:23,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:50:23,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:23,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:23,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:23,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:24,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902534231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:24,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:24,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 07:50:24,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596416531] [2023-11-19 07:50:24,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:24,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:50:24,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:24,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:50:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:50:24,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:24,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 465 flow. Second operand has 21 states, 21 states have (on average 79.80952380952381) internal successors, (1676), 21 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:24,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:24,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:24,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:24,887 INFO L124 PetriNetUnfolderBase]: 183/373 cut-off events. [2023-11-19 07:50:24,887 INFO L125 PetriNetUnfolderBase]: For 1035/1035 co-relation queries the response was YES. [2023-11-19 07:50:24,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 373 events. 183/373 cut-off events. For 1035/1035 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1593 event pairs, 22 based on Foata normal form. 2/375 useless extension candidates. Maximal degree in co-relation 1570. Up to 123 conditions per place. [2023-11-19 07:50:24,891 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 58 selfloop transitions, 41 changer transitions 23/122 dead transitions. [2023-11-19 07:50:24,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 122 transitions, 920 flow [2023-11-19 07:50:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:50:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:50:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1590 transitions. [2023-11-19 07:50:24,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41842105263157897 [2023-11-19 07:50:24,898 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1590 transitions. [2023-11-19 07:50:24,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1590 transitions. [2023-11-19 07:50:24,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:24,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1590 transitions. [2023-11-19 07:50:24,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.6842105263158) internal successors, (1590), 19 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:24,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 200.0) internal successors, (4000), 20 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:24,913 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 200.0) internal successors, (4000), 20 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:24,913 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 465 flow. Second operand 19 states and 1590 transitions. [2023-11-19 07:50:24,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 122 transitions, 920 flow [2023-11-19 07:50:24,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 122 transitions, 871 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-19 07:50:24,923 INFO L231 Difference]: Finished difference. Result has 87 places, 59 transitions, 468 flow [2023-11-19 07:50:24,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=468, PETRI_PLACES=87, PETRI_TRANSITIONS=59} [2023-11-19 07:50:24,924 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2023-11-19 07:50:24,925 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 59 transitions, 468 flow [2023-11-19 07:50:24,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 79.80952380952381) internal successors, (1676), 21 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:24,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:24,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:24,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:25,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:25,144 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)] === [2023-11-19 07:50:25,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1280678210, now seen corresponding path program 4 times [2023-11-19 07:50:25,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:25,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687810496] [2023-11-19 07:50:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:25,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:25,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:25,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687810496] [2023-11-19 07:50:25,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687810496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:25,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715212143] [2023-11-19 07:50:25,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:50:25,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:25,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:25,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:25,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:50:25,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:50:25,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:25,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:50:25,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:25,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:25,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715212143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:25,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:25,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-19 07:50:25,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834572440] [2023-11-19 07:50:25,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:25,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:50:25,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:50:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:50:25,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 200 [2023-11-19 07:50:25,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 59 transitions, 468 flow. Second operand has 7 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:25,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:25,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 200 [2023-11-19 07:50:25,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:25,571 INFO L124 PetriNetUnfolderBase]: 160/306 cut-off events. [2023-11-19 07:50:25,572 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-11-19 07:50:25,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361 conditions, 306 events. 160/306 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1093 event pairs, 25 based on Foata normal form. 18/324 useless extension candidates. Maximal degree in co-relation 1340. Up to 229 conditions per place. [2023-11-19 07:50:25,575 INFO L140 encePairwiseOnDemand]: 195/200 looper letters, 51 selfloop transitions, 12 changer transitions 1/64 dead transitions. [2023-11-19 07:50:25,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 597 flow [2023-11-19 07:50:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:50:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 457 transitions. [2023-11-19 07:50:25,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457 [2023-11-19 07:50:25,579 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 457 transitions. [2023-11-19 07:50:25,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 457 transitions. [2023-11-19 07:50:25,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:25,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 457 transitions. [2023-11-19 07:50:25,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:25,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:25,584 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:25,584 INFO L175 Difference]: Start difference. First operand has 87 places, 59 transitions, 468 flow. Second operand 5 states and 457 transitions. [2023-11-19 07:50:25,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 597 flow [2023-11-19 07:50:25,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 503 flow, removed 4 selfloop flow, removed 17 redundant places. [2023-11-19 07:50:25,594 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 372 flow [2023-11-19 07:50:25,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-11-19 07:50:25,595 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-11-19 07:50:25,595 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 372 flow [2023-11-19 07:50:25,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:25,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:25,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:25,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:25,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:25,817 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)] === [2023-11-19 07:50:25,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:25,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1820519142, now seen corresponding path program 5 times [2023-11-19 07:50:25,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:25,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020305440] [2023-11-19 07:50:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:25,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:26,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:26,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020305440] [2023-11-19 07:50:26,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020305440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:26,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988687810] [2023-11-19 07:50:26,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:50:26,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:26,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:26,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:26,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:50:26,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:26,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:26,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:50:26,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:26,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:26,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988687810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:26,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:26,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-19 07:50:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278038127] [2023-11-19 07:50:26,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:26,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:50:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:50:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:50:27,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:27,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 372 flow. Second operand has 20 states, 20 states have (on average 79.8) internal successors, (1596), 20 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:27,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:27,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:27,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:27,878 INFO L124 PetriNetUnfolderBase]: 229/457 cut-off events. [2023-11-19 07:50:27,878 INFO L125 PetriNetUnfolderBase]: For 1480/1480 co-relation queries the response was YES. [2023-11-19 07:50:27,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 457 events. 229/457 cut-off events. For 1480/1480 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2035 event pairs, 26 based on Foata normal form. 3/460 useless extension candidates. Maximal degree in co-relation 1982. Up to 257 conditions per place. [2023-11-19 07:50:27,883 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 74 selfloop transitions, 36 changer transitions 24/134 dead transitions. [2023-11-19 07:50:27,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 134 transitions, 1061 flow [2023-11-19 07:50:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:50:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:50:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1745 transitions. [2023-11-19 07:50:27,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154761904761905 [2023-11-19 07:50:27,892 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1745 transitions. [2023-11-19 07:50:27,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1745 transitions. [2023-11-19 07:50:27,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:27,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1745 transitions. [2023-11-19 07:50:27,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.0952380952381) internal successors, (1745), 21 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:27,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:27,910 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:27,911 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 372 flow. Second operand 21 states and 1745 transitions. [2023-11-19 07:50:27,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 134 transitions, 1061 flow [2023-11-19 07:50:27,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 134 transitions, 1015 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-19 07:50:27,920 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 625 flow [2023-11-19 07:50:27,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=625, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2023-11-19 07:50:27,922 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2023-11-19 07:50:27,922 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 625 flow [2023-11-19 07:50:27,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 79.8) internal successors, (1596), 20 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:27,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:27,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:27,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:28,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:28,136 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)] === [2023-11-19 07:50:28,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:28,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1414279934, now seen corresponding path program 6 times [2023-11-19 07:50:28,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:28,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535052269] [2023-11-19 07:50:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:28,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:28,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535052269] [2023-11-19 07:50:28,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535052269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:28,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85294366] [2023-11-19 07:50:28,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:50:28,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:28,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:28,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:28,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:50:28,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:50:28,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:28,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:28,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:28,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:29,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85294366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:29,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:29,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 07:50:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699546562] [2023-11-19 07:50:29,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:29,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:50:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:50:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:50:29,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:29,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 625 flow. Second operand has 21 states, 21 states have (on average 79.71428571428571) internal successors, (1674), 21 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:29,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:29,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:29,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:29,996 INFO L124 PetriNetUnfolderBase]: 211/411 cut-off events. [2023-11-19 07:50:29,996 INFO L125 PetriNetUnfolderBase]: For 1912/1912 co-relation queries the response was YES. [2023-11-19 07:50:29,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 411 events. 211/411 cut-off events. For 1912/1912 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1692 event pairs, 28 based on Foata normal form. 1/412 useless extension candidates. Maximal degree in co-relation 2015. Up to 306 conditions per place. [2023-11-19 07:50:30,002 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 69 selfloop transitions, 22 changer transitions 16/107 dead transitions. [2023-11-19 07:50:30,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 1050 flow [2023-11-19 07:50:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:50:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:50:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1076 transitions. [2023-11-19 07:50:30,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41384615384615386 [2023-11-19 07:50:30,007 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1076 transitions. [2023-11-19 07:50:30,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1076 transitions. [2023-11-19 07:50:30,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:30,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1076 transitions. [2023-11-19 07:50:30,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 82.76923076923077) internal successors, (1076), 13 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:30,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 200.0) internal successors, (2800), 14 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:30,017 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 200.0) internal successors, (2800), 14 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:30,017 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 625 flow. Second operand 13 states and 1076 transitions. [2023-11-19 07:50:30,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 1050 flow [2023-11-19 07:50:30,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 107 transitions, 950 flow, removed 36 selfloop flow, removed 10 redundant places. [2023-11-19 07:50:30,031 INFO L231 Difference]: Finished difference. Result has 89 places, 72 transitions, 604 flow [2023-11-19 07:50:30,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=604, PETRI_PLACES=89, PETRI_TRANSITIONS=72} [2023-11-19 07:50:30,032 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2023-11-19 07:50:30,032 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 72 transitions, 604 flow [2023-11-19 07:50:30,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 79.71428571428571) internal successors, (1674), 21 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:30,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:30,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:30,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:30,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:30,254 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)] === [2023-11-19 07:50:30,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:30,255 INFO L85 PathProgramCache]: Analyzing trace with hash -830290396, now seen corresponding path program 7 times [2023-11-19 07:50:30,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:30,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497810956] [2023-11-19 07:50:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:30,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:30,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497810956] [2023-11-19 07:50:30,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497810956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522610438] [2023-11-19 07:50:30,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:50:30,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:30,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:30,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:30,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:50:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:30,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:30,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:30,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:31,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522610438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:31,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:31,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 07:50:31,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803943947] [2023-11-19 07:50:31,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:31,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:50:31,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:50:31,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:50:31,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:31,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 72 transitions, 604 flow. Second operand has 21 states, 21 states have (on average 79.76190476190476) internal successors, (1675), 21 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:31,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:31,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:31,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:32,069 INFO L124 PetriNetUnfolderBase]: 219/427 cut-off events. [2023-11-19 07:50:32,069 INFO L125 PetriNetUnfolderBase]: For 1708/1708 co-relation queries the response was YES. [2023-11-19 07:50:32,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 427 events. 219/427 cut-off events. For 1708/1708 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1774 event pairs, 16 based on Foata normal form. 2/429 useless extension candidates. Maximal degree in co-relation 1975. Up to 265 conditions per place. [2023-11-19 07:50:32,074 INFO L140 encePairwiseOnDemand]: 191/200 looper letters, 79 selfloop transitions, 27 changer transitions 20/126 dead transitions. [2023-11-19 07:50:32,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 126 transitions, 1143 flow [2023-11-19 07:50:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:50:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:50:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1171 transitions. [2023-11-19 07:50:32,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182142857142857 [2023-11-19 07:50:32,078 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1171 transitions. [2023-11-19 07:50:32,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1171 transitions. [2023-11-19 07:50:32,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:32,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1171 transitions. [2023-11-19 07:50:32,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 83.64285714285714) internal successors, (1171), 14 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:32,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 200.0) internal successors, (3000), 15 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:32,088 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 200.0) internal successors, (3000), 15 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:32,088 INFO L175 Difference]: Start difference. First operand has 89 places, 72 transitions, 604 flow. Second operand 14 states and 1171 transitions. [2023-11-19 07:50:32,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 126 transitions, 1143 flow [2023-11-19 07:50:32,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 126 transitions, 1077 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-11-19 07:50:32,099 INFO L231 Difference]: Finished difference. Result has 100 places, 77 transitions, 683 flow [2023-11-19 07:50:32,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=683, PETRI_PLACES=100, PETRI_TRANSITIONS=77} [2023-11-19 07:50:32,100 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 71 predicate places. [2023-11-19 07:50:32,100 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 77 transitions, 683 flow [2023-11-19 07:50:32,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 79.76190476190476) internal successors, (1675), 21 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:32,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:32,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:32,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:32,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:32,316 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)] === [2023-11-19 07:50:32,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1259243300, now seen corresponding path program 8 times [2023-11-19 07:50:32,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:32,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992643277] [2023-11-19 07:50:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:32,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992643277] [2023-11-19 07:50:32,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992643277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722976375] [2023-11-19 07:50:32,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:32,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:32,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:32,551 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:32,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:50:32,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:32,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:32,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:32,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:32,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:33,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722976375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:33,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:33,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 07:50:33,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825550070] [2023-11-19 07:50:33,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:33,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:50:33,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:33,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:50:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:50:33,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:33,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 77 transitions, 683 flow. Second operand has 21 states, 21 states have (on average 79.71428571428571) internal successors, (1674), 21 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:33,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:33,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:33,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:33,971 INFO L124 PetriNetUnfolderBase]: 191/361 cut-off events. [2023-11-19 07:50:33,972 INFO L125 PetriNetUnfolderBase]: For 1454/1454 co-relation queries the response was YES. [2023-11-19 07:50:33,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794 conditions, 361 events. 191/361 cut-off events. For 1454/1454 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1342 event pairs, 14 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 1760. Up to 266 conditions per place. [2023-11-19 07:50:33,977 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 73 selfloop transitions, 25 changer transitions 9/107 dead transitions. [2023-11-19 07:50:33,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 107 transitions, 1067 flow [2023-11-19 07:50:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:50:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:50:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1072 transitions. [2023-11-19 07:50:33,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123076923076923 [2023-11-19 07:50:33,980 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1072 transitions. [2023-11-19 07:50:33,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1072 transitions. [2023-11-19 07:50:33,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:33,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1072 transitions. [2023-11-19 07:50:33,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 82.46153846153847) internal successors, (1072), 13 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:33,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 200.0) internal successors, (2800), 14 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:33,988 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 200.0) internal successors, (2800), 14 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:33,989 INFO L175 Difference]: Start difference. First operand has 100 places, 77 transitions, 683 flow. Second operand 13 states and 1072 transitions. [2023-11-19 07:50:33,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 107 transitions, 1067 flow [2023-11-19 07:50:33,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 107 transitions, 944 flow, removed 35 selfloop flow, removed 15 redundant places. [2023-11-19 07:50:34,000 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 663 flow [2023-11-19 07:50:34,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=663, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2023-11-19 07:50:34,003 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2023-11-19 07:50:34,003 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 663 flow [2023-11-19 07:50:34,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 79.71428571428571) internal successors, (1674), 21 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:34,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:34,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:34,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:34,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:34,225 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)] === [2023-11-19 07:50:34,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash -518796470, now seen corresponding path program 9 times [2023-11-19 07:50:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:34,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160280721] [2023-11-19 07:50:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:34,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:34,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:34,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160280721] [2023-11-19 07:50:34,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160280721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:34,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832868672] [2023-11-19 07:50:34,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:50:34,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:34,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:34,504 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:34,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:50:34,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:50:34,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:34,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:50:34,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:34,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:35,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832868672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:35,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:35,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 07:50:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365662662] [2023-11-19 07:50:35,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:50:35,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:50:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:50:35,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:35,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 663 flow. Second operand has 25 states, 25 states have (on average 79.8) internal successors, (1995), 25 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:35,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:35,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:35,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:37,313 INFO L124 PetriNetUnfolderBase]: 275/537 cut-off events. [2023-11-19 07:50:37,313 INFO L125 PetriNetUnfolderBase]: For 2405/2405 co-relation queries the response was YES. [2023-11-19 07:50:37,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 537 events. 275/537 cut-off events. For 2405/2405 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2418 event pairs, 14 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 2589. Up to 187 conditions per place. [2023-11-19 07:50:37,321 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 98 selfloop transitions, 86 changer transitions 20/204 dead transitions. [2023-11-19 07:50:37,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 204 transitions, 1755 flow [2023-11-19 07:50:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 07:50:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-19 07:50:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2502 transitions. [2023-11-19 07:50:37,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417 [2023-11-19 07:50:37,329 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2502 transitions. [2023-11-19 07:50:37,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2502 transitions. [2023-11-19 07:50:37,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:37,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2502 transitions. [2023-11-19 07:50:37,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 83.4) internal successors, (2502), 30 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:37,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:37,349 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:37,349 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 663 flow. Second operand 30 states and 2502 transitions. [2023-11-19 07:50:37,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 204 transitions, 1755 flow [2023-11-19 07:50:37,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 204 transitions, 1643 flow, removed 20 selfloop flow, removed 12 redundant places. [2023-11-19 07:50:37,369 INFO L231 Difference]: Finished difference. Result has 115 places, 109 transitions, 1061 flow [2023-11-19 07:50:37,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1061, PETRI_PLACES=115, PETRI_TRANSITIONS=109} [2023-11-19 07:50:37,369 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 86 predicate places. [2023-11-19 07:50:37,370 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 109 transitions, 1061 flow [2023-11-19 07:50:37,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.8) internal successors, (1995), 25 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:37,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:37,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:37,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:37,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:50:37,594 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)] === [2023-11-19 07:50:37,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1441764368, now seen corresponding path program 10 times [2023-11-19 07:50:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:37,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256610388] [2023-11-19 07:50:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:37,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:37,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:37,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256610388] [2023-11-19 07:50:37,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256610388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:37,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757812555] [2023-11-19 07:50:37,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:50:37,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:37,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:37,920 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:37,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:50:38,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:50:38,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:38,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:50:38,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:38,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:38,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757812555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:38,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:38,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 07:50:38,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314816137] [2023-11-19 07:50:38,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:38,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:50:38,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:50:38,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:50:38,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:38,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 109 transitions, 1061 flow. Second operand has 25 states, 25 states have (on average 79.84) internal successors, (1996), 25 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:38,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:38,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:38,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:40,646 INFO L124 PetriNetUnfolderBase]: 319/638 cut-off events. [2023-11-19 07:50:40,647 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2023-11-19 07:50:40,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 638 events. 319/638 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3132 event pairs, 8 based on Foata normal form. 4/642 useless extension candidates. Maximal degree in co-relation 3519. Up to 233 conditions per place. [2023-11-19 07:50:40,659 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 95 selfloop transitions, 93 changer transitions 33/221 dead transitions. [2023-11-19 07:50:40,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 221 transitions, 2129 flow [2023-11-19 07:50:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:50:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-19 07:50:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2666 transitions. [2023-11-19 07:50:40,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165625 [2023-11-19 07:50:40,672 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2666 transitions. [2023-11-19 07:50:40,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2666 transitions. [2023-11-19 07:50:40,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:40,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2666 transitions. [2023-11-19 07:50:40,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 83.3125) internal successors, (2666), 32 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:40,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 200.0) internal successors, (6600), 33 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:40,700 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 200.0) internal successors, (6600), 33 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:40,700 INFO L175 Difference]: Start difference. First operand has 115 places, 109 transitions, 1061 flow. Second operand 32 states and 2666 transitions. [2023-11-19 07:50:40,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 221 transitions, 2129 flow [2023-11-19 07:50:40,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 221 transitions, 1690 flow, removed 172 selfloop flow, removed 13 redundant places. [2023-11-19 07:50:40,738 INFO L231 Difference]: Finished difference. Result has 137 places, 123 transitions, 1126 flow [2023-11-19 07:50:40,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1126, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2023-11-19 07:50:40,739 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2023-11-19 07:50:40,739 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 1126 flow [2023-11-19 07:50:40,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.84) internal successors, (1996), 25 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:40,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:40,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:40,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:40,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:50:40,956 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)] === [2023-11-19 07:50:40,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:40,957 INFO L85 PathProgramCache]: Analyzing trace with hash 628309078, now seen corresponding path program 11 times [2023-11-19 07:50:40,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:40,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316228503] [2023-11-19 07:50:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:40,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:41,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:41,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316228503] [2023-11-19 07:50:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316228503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:41,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249169088] [2023-11-19 07:50:41,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:50:41,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:41,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:41,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:41,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:50:41,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:41,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:41,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:50:41,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:41,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:42,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249169088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:42,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:42,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 07:50:42,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008143792] [2023-11-19 07:50:42,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:42,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:50:42,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:42,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:50:42,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:50:42,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:42,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 1126 flow. Second operand has 25 states, 25 states have (on average 79.76) internal successors, (1994), 25 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:42,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:42,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:42,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:44,501 INFO L124 PetriNetUnfolderBase]: 358/731 cut-off events. [2023-11-19 07:50:44,501 INFO L125 PetriNetUnfolderBase]: For 4611/4611 co-relation queries the response was YES. [2023-11-19 07:50:44,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3707 conditions, 731 events. 358/731 cut-off events. For 4611/4611 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3784 event pairs, 20 based on Foata normal form. 4/735 useless extension candidates. Maximal degree in co-relation 3676. Up to 249 conditions per place. [2023-11-19 07:50:44,512 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 110 selfloop transitions, 104 changer transitions 32/246 dead transitions. [2023-11-19 07:50:44,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 246 transitions, 2256 flow [2023-11-19 07:50:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-19 07:50:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-19 07:50:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2913 transitions. [2023-11-19 07:50:44,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41614285714285715 [2023-11-19 07:50:44,519 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2913 transitions. [2023-11-19 07:50:44,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2913 transitions. [2023-11-19 07:50:44,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:44,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2913 transitions. [2023-11-19 07:50:44,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 83.22857142857143) internal successors, (2913), 35 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:44,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 200.0) internal successors, (7200), 36 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:44,540 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 200.0) internal successors, (7200), 36 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:44,540 INFO L175 Difference]: Start difference. First operand has 137 places, 123 transitions, 1126 flow. Second operand 35 states and 2913 transitions. [2023-11-19 07:50:44,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 246 transitions, 2256 flow [2023-11-19 07:50:44,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 246 transitions, 1784 flow, removed 176 selfloop flow, removed 22 redundant places. [2023-11-19 07:50:44,581 INFO L231 Difference]: Finished difference. Result has 153 places, 136 transitions, 1232 flow [2023-11-19 07:50:44,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1232, PETRI_PLACES=153, PETRI_TRANSITIONS=136} [2023-11-19 07:50:44,582 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2023-11-19 07:50:44,582 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 136 transitions, 1232 flow [2023-11-19 07:50:44,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.76) internal successors, (1994), 25 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:44,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:44,583 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:44,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:44,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:50:44,808 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)] === [2023-11-19 07:50:44,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:44,808 INFO L85 PathProgramCache]: Analyzing trace with hash 656014708, now seen corresponding path program 12 times [2023-11-19 07:50:44,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:44,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167299816] [2023-11-19 07:50:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:45,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:45,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167299816] [2023-11-19 07:50:45,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167299816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:45,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200246664] [2023-11-19 07:50:45,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:50:45,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:45,193 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:45,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:50:45,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:50:45,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:45,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:50:45,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:45,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:46,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200246664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:46,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:46,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 07:50:46,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558885333] [2023-11-19 07:50:46,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:46,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:50:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:50:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:50:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:46,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 136 transitions, 1232 flow. Second operand has 25 states, 25 states have (on average 79.76) internal successors, (1994), 25 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:46,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:46,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:46,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:47,983 INFO L124 PetriNetUnfolderBase]: 337/686 cut-off events. [2023-11-19 07:50:47,983 INFO L125 PetriNetUnfolderBase]: For 2340/2340 co-relation queries the response was YES. [2023-11-19 07:50:47,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3287 conditions, 686 events. 337/686 cut-off events. For 2340/2340 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3453 event pairs, 22 based on Foata normal form. 2/688 useless extension candidates. Maximal degree in co-relation 3252. Up to 290 conditions per place. [2023-11-19 07:50:47,994 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 102 selfloop transitions, 97 changer transitions 21/220 dead transitions. [2023-11-19 07:50:47,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 220 transitions, 1963 flow [2023-11-19 07:50:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 07:50:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-19 07:50:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2415 transitions. [2023-11-19 07:50:48,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4163793103448276 [2023-11-19 07:50:48,001 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2415 transitions. [2023-11-19 07:50:48,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2415 transitions. [2023-11-19 07:50:48,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:48,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2415 transitions. [2023-11-19 07:50:48,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 83.27586206896552) internal successors, (2415), 29 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:48,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 200.0) internal successors, (6000), 30 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:48,020 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 200.0) internal successors, (6000), 30 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:48,021 INFO L175 Difference]: Start difference. First operand has 153 places, 136 transitions, 1232 flow. Second operand 29 states and 2415 transitions. [2023-11-19 07:50:48,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 220 transitions, 1963 flow [2023-11-19 07:50:48,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 220 transitions, 1824 flow, removed 24 selfloop flow, removed 20 redundant places. [2023-11-19 07:50:48,051 INFO L231 Difference]: Finished difference. Result has 156 places, 134 transitions, 1318 flow [2023-11-19 07:50:48,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1318, PETRI_PLACES=156, PETRI_TRANSITIONS=134} [2023-11-19 07:50:48,052 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2023-11-19 07:50:48,052 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 134 transitions, 1318 flow [2023-11-19 07:50:48,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.76) internal successors, (1994), 25 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:48,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:48,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:48,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:48,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:48,277 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)] === [2023-11-19 07:50:48,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash 984397590, now seen corresponding path program 13 times [2023-11-19 07:50:48,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:48,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895958987] [2023-11-19 07:50:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:48,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:48,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895958987] [2023-11-19 07:50:48,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895958987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:48,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761050211] [2023-11-19 07:50:48,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:50:48,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:48,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:48,576 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:48,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:50:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:50:48,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:48,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761050211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:49,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:49,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 07:50:49,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022795832] [2023-11-19 07:50:49,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:49,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:50:49,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:49,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:50:49,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:50:49,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:49,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 134 transitions, 1318 flow. Second operand has 25 states, 25 states have (on average 79.76) internal successors, (1994), 25 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:49,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:49,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:49,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:51,638 INFO L124 PetriNetUnfolderBase]: 437/882 cut-off events. [2023-11-19 07:50:51,638 INFO L125 PetriNetUnfolderBase]: For 3037/3037 co-relation queries the response was YES. [2023-11-19 07:50:51,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4429 conditions, 882 events. 437/882 cut-off events. For 3037/3037 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4742 event pairs, 62 based on Foata normal form. 3/879 useless extension candidates. Maximal degree in co-relation 4394. Up to 513 conditions per place. [2023-11-19 07:50:51,653 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 146 selfloop transitions, 103 changer transitions 15/264 dead transitions. [2023-11-19 07:50:51,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 264 transitions, 2559 flow [2023-11-19 07:50:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-19 07:50:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-19 07:50:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2896 transitions. [2023-11-19 07:50:51,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137142857142857 [2023-11-19 07:50:51,660 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2896 transitions. [2023-11-19 07:50:51,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2896 transitions. [2023-11-19 07:50:51,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:51,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2896 transitions. [2023-11-19 07:50:51,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 82.74285714285715) internal successors, (2896), 35 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:51,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 200.0) internal successors, (7200), 36 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:51,681 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 200.0) internal successors, (7200), 36 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:51,682 INFO L175 Difference]: Start difference. First operand has 156 places, 134 transitions, 1318 flow. Second operand 35 states and 2896 transitions. [2023-11-19 07:50:51,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 264 transitions, 2559 flow [2023-11-19 07:50:51,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 264 transitions, 2327 flow, removed 12 selfloop flow, removed 24 redundant places. [2023-11-19 07:50:51,712 INFO L231 Difference]: Finished difference. Result has 174 places, 175 transitions, 1847 flow [2023-11-19 07:50:51,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1847, PETRI_PLACES=174, PETRI_TRANSITIONS=175} [2023-11-19 07:50:51,713 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2023-11-19 07:50:51,713 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 175 transitions, 1847 flow [2023-11-19 07:50:51,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.76) internal successors, (1994), 25 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:51,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:51,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:51,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:51,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:51,932 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)] === [2023-11-19 07:50:51,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:51,933 INFO L85 PathProgramCache]: Analyzing trace with hash -706772022, now seen corresponding path program 14 times [2023-11-19 07:50:51,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:51,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871581736] [2023-11-19 07:50:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:52,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:52,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871581736] [2023-11-19 07:50:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871581736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:52,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708020586] [2023-11-19 07:50:52,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:52,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:52,244 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:52,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:50:52,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:52,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:52,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:50:52,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:52,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:53,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708020586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:53,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:53,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 07:50:53,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783348290] [2023-11-19 07:50:53,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:53,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:50:53,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:50:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:50:53,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-19 07:50:53,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 175 transitions, 1847 flow. Second operand has 25 states, 25 states have (on average 79.8) internal successors, (1995), 25 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:53,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:53,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-19 07:50:53,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:55,933 INFO L124 PetriNetUnfolderBase]: 601/1215 cut-off events. [2023-11-19 07:50:55,933 INFO L125 PetriNetUnfolderBase]: For 7221/7221 co-relation queries the response was YES. [2023-11-19 07:50:55,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6763 conditions, 1215 events. 601/1215 cut-off events. For 7221/7221 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7168 event pairs, 70 based on Foata normal form. 8/1217 useless extension candidates. Maximal degree in co-relation 6718. Up to 539 conditions per place. [2023-11-19 07:50:55,952 INFO L140 encePairwiseOnDemand]: 192/200 looper letters, 182 selfloop transitions, 142 changer transitions 42/366 dead transitions. [2023-11-19 07:50:55,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 366 transitions, 4009 flow [2023-11-19 07:50:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-19 07:50:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-19 07:50:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4054 transitions. [2023-11-19 07:50:55,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4136734693877551 [2023-11-19 07:50:55,961 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4054 transitions. [2023-11-19 07:50:55,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4054 transitions. [2023-11-19 07:50:55,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:55,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4054 transitions. [2023-11-19 07:50:55,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 82.73469387755102) internal successors, (4054), 49 states have internal predecessors, (4054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:55,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 200.0) internal successors, (10000), 50 states have internal predecessors, (10000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:55,984 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 200.0) internal successors, (10000), 50 states have internal predecessors, (10000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:55,985 INFO L175 Difference]: Start difference. First operand has 174 places, 175 transitions, 1847 flow. Second operand 49 states and 4054 transitions. [2023-11-19 07:50:55,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 366 transitions, 4009 flow [2023-11-19 07:50:56,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 366 transitions, 3770 flow, removed 95 selfloop flow, removed 12 redundant places. [2023-11-19 07:50:56,051 INFO L231 Difference]: Finished difference. Result has 222 places, 233 transitions, 2832 flow [2023-11-19 07:50:56,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2832, PETRI_PLACES=222, PETRI_TRANSITIONS=233} [2023-11-19 07:50:56,052 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 193 predicate places. [2023-11-19 07:50:56,052 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 233 transitions, 2832 flow [2023-11-19 07:50:56,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.8) internal successors, (1995), 25 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:56,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:56,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:56,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:56,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-19 07:50:56,260 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)] === [2023-11-19 07:50:56,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash -615611562, now seen corresponding path program 15 times [2023-11-19 07:50:56,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:56,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561962673] [2023-11-19 07:50:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:56,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:56,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561962673] [2023-11-19 07:50:56,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561962673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:56,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299588554] [2023-11-19 07:50:56,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:50:56,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:56,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:56,593 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:56,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2990c83-76df-4dec-a5ae-57b074f2fffd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:50:56,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:50:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:56,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:50:56,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:57,026 INFO L327 TraceCheckSpWp]: Computing backward predicates...