./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:12:44,984 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:12:45,060 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:12:45,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:12:45,067 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:12:45,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:12:45,096 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:12:45,097 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:12:45,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:12:45,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:12:45,099 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:12:45,100 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:12:45,100 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:12:45,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:12:45,101 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:12:45,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:12:45,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:12:45,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:12:45,103 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:12:45,104 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:12:45,104 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:12:45,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:12:45,105 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:12:45,106 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:12:45,106 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:12:45,107 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:12:45,107 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:12:45,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:12:45,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:12:45,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:45,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:12:45,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:12:45,109 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:12:45,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:12:45,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:12:45,110 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:12:45,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:12:45,111 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:12:45,111 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_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2023-11-06 22:12:45,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:12:45,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:12:45,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:12:45,441 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:12:45,442 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:12:45,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-06 22:12:48,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:12:48,866 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:12:48,867 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-06 22:12:48,875 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/data/3b60d3bba/fb6e41cb1bae417d9dc9debfb47d15f9/FLAG136133d59 [2023-11-06 22:12:48,895 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/data/3b60d3bba/fb6e41cb1bae417d9dc9debfb47d15f9 [2023-11-06 22:12:48,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:12:48,906 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:12:48,909 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:48,909 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:12:48,914 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:12:48,919 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:48" (1/1) ... [2023-11-06 22:12:48,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d55c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:48, skipping insertion in model container [2023-11-06 22:12:48,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:48" (1/1) ... [2023-11-06 22:12:48,950 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:12:49,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:49,166 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:12:49,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:49,196 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:12:49,197 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:12:49,205 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:12:49,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49 WrapperNode [2023-11-06 22:12:49,205 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:49,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:49,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:12:49,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:12:49,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,223 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,252 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-06 22:12:49,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:49,253 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:12:49,253 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:12:49,254 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:12:49,261 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,273 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,274 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,276 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,278 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:12:49,279 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:12:49,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:12:49,280 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:12:49,288 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (1/1) ... [2023-11-06 22:12:49,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:49,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:49,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:12:49,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:12:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:12:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:12:49,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:12:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:12:49,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:12:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:12:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:12:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:12:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:12:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:12:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:12:49,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:12:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:12:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:12:49,360 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:12:49,459 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:12:49,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:12:49,678 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:12:49,732 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:12:49,732 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:12:49,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:49 BoogieIcfgContainer [2023-11-06 22:12:49,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:12:49,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:12:49,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:12:49,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:12:49,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:12:48" (1/3) ... [2023-11-06 22:12:49,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52acfb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:49, skipping insertion in model container [2023-11-06 22:12:49,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:49" (2/3) ... [2023-11-06 22:12:49,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52acfb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:49, skipping insertion in model container [2023-11-06 22:12:49,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:49" (3/3) ... [2023-11-06 22:12:49,745 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-06 22:12:49,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:12:49,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-06 22:12:49,774 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:12:49,873 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:12:49,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 204 flow [2023-11-06 22:12:49,984 INFO L124 PetriNetUnfolderBase]: 6/93 cut-off events. [2023-11-06 22:12:49,984 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:12:49,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-11-06 22:12:49,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 95 transitions, 204 flow [2023-11-06 22:12:49,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 88 transitions, 188 flow [2023-11-06 22:12:50,000 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:50,011 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 88 transitions, 188 flow [2023-11-06 22:12:50,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 88 transitions, 188 flow [2023-11-06 22:12:50,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 188 flow [2023-11-06 22:12:50,047 INFO L124 PetriNetUnfolderBase]: 6/88 cut-off events. [2023-11-06 22:12:50,047 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:12:50,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 88 events. 6/88 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. 0/73 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-11-06 22:12:50,050 INFO L119 LiptonReduction]: Number of co-enabled transitions 580 [2023-11-06 22:12:53,423 INFO L134 LiptonReduction]: Checked pairs total: 698 [2023-11-06 22:12:53,423 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-11-06 22:12:53,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:53,447 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;@1093767f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:53,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-06 22:12:53,449 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:53,449 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 22:12:53,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:53,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:53,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:12:53,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:12:53,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash 381, now seen corresponding path program 1 times [2023-11-06 22:12:53,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:53,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055824166] [2023-11-06 22:12:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:53,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:53,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:53,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055824166] [2023-11-06 22:12:53,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055824166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:53,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:53,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:12:53,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401354082] [2023-11-06 22:12:53,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:53,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:53,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:53,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:53,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2023-11-06 22:12:53,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:53,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:53,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2023-11-06 22:12:53,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:53,676 INFO L124 PetriNetUnfolderBase]: 106/169 cut-off events. [2023-11-06 22:12:53,676 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:12:53,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 106/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 537 event pairs, 45 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 277. Up to 167 conditions per place. [2023-11-06 22:12:53,680 INFO L140 encePairwiseOnDemand]: 183/186 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-06 22:12:53,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-11-06 22:12:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:12:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:12:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2023-11-06 22:12:53,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2023-11-06 22:12:53,701 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2023-11-06 22:12:53,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2023-11-06 22:12:53,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:53,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2023-11-06 22:12:53,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:53,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:53,723 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:53,725 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 190 transitions. [2023-11-06 22:12:53,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-11-06 22:12:53,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:12:53,730 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-06 22:12:53,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, 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} [2023-11-06 22:12:53,740 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 22:12:53,740 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-06 22:12:53,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:53,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:53,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:12:53,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:12:53,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:12:53,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 375368, now seen corresponding path program 1 times [2023-11-06 22:12:53,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:53,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797133405] [2023-11-06 22:12:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:53,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:53,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797133405] [2023-11-06 22:12:53,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797133405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:53,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:53,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:53,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256308160] [2023-11-06 22:12:53,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:53,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:12:53,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:12:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:12:53,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 186 [2023-11-06 22:12:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:53,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:53,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 186 [2023-11-06 22:12:53,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:54,005 INFO L124 PetriNetUnfolderBase]: 99/156 cut-off events. [2023-11-06 22:12:54,005 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:12:54,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 156 events. 99/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 477 event pairs, 42 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-11-06 22:12:54,007 INFO L140 encePairwiseOnDemand]: 183/186 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-06 22:12:54,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-11-06 22:12:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:12:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:12:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-11-06 22:12:54,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43189964157706096 [2023-11-06 22:12:54,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-11-06 22:12:54,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-11-06 22:12:54,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:54,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-11-06 22:12:54,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,016 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 241 transitions. [2023-11-06 22:12:54,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-11-06 22:12:54,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:54,017 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-06 22:12:54,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, 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} [2023-11-06 22:12:54,018 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 22:12:54,018 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-06 22:12:54,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:54,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:12:54,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:12:54,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:12:54,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 375367, now seen corresponding path program 1 times [2023-11-06 22:12:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:54,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218836825] [2023-11-06 22:12:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:54,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:54,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:54,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218836825] [2023-11-06 22:12:54,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218836825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:54,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:54,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:54,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36358378] [2023-11-06 22:12:54,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:54,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:12:54,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:54,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:12:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:12:54,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 186 [2023-11-06 22:12:54,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:54,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 186 [2023-11-06 22:12:54,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:54,386 INFO L124 PetriNetUnfolderBase]: 92/143 cut-off events. [2023-11-06 22:12:54,386 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:12:54,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 143 events. 92/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 433 event pairs, 39 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 288. Up to 140 conditions per place. [2023-11-06 22:12:54,389 INFO L140 encePairwiseOnDemand]: 183/186 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-06 22:12:54,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-11-06 22:12:54,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:12:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:12:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-11-06 22:12:54,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449820788530466 [2023-11-06 22:12:54,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-11-06 22:12:54,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-11-06 22:12:54,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:54,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-11-06 22:12:54,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,403 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 251 transitions. [2023-11-06 22:12:54,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-11-06 22:12:54,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:12:54,405 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-06 22:12:54,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, 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} [2023-11-06 22:12:54,406 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 22:12:54,406 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-06 22:12:54,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:54,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:12:54,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:12:54,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:12:54,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash 360735036, now seen corresponding path program 1 times [2023-11-06 22:12:54,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400988858] [2023-11-06 22:12:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:54,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:54,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:54,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400988858] [2023-11-06 22:12:54,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400988858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:54,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:54,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:12:54,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934402488] [2023-11-06 22:12:54,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:54,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:12:54,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:54,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:12:54,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:12:54,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 186 [2023-11-06 22:12:54,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:54,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 186 [2023-11-06 22:12:54,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:54,670 INFO L124 PetriNetUnfolderBase]: 70/112 cut-off events. [2023-11-06 22:12:54,670 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:12:54,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 112 events. 70/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 300 event pairs, 29 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 227. Up to 109 conditions per place. [2023-11-06 22:12:54,675 INFO L140 encePairwiseOnDemand]: 184/186 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-06 22:12:54,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-11-06 22:12:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:12:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:12:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-11-06 22:12:54,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2023-11-06 22:12:54,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-11-06 22:12:54,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-11-06 22:12:54,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:54,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-11-06 22:12:54,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,684 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 225 transitions. [2023-11-06 22:12:54,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-11-06 22:12:54,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:12:54,686 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-06 22:12:54,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, 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} [2023-11-06 22:12:54,688 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 22:12:54,688 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-06 22:12:54,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:54,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:12:54,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:12:54,690 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:12:54,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:54,690 INFO L85 PathProgramCache]: Analyzing trace with hash 360735035, now seen corresponding path program 1 times [2023-11-06 22:12:54,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:54,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402205790] [2023-11-06 22:12:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:54,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:54,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:54,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402205790] [2023-11-06 22:12:54,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402205790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:54,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:54,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:54,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250946655] [2023-11-06 22:12:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:54,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:12:54,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:12:54,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:12:54,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 186 [2023-11-06 22:12:54,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:54,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 186 [2023-11-06 22:12:54,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:54,873 INFO L124 PetriNetUnfolderBase]: 48/81 cut-off events. [2023-11-06 22:12:54,873 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:12:54,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 48/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 181 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2023-11-06 22:12:54,876 INFO L140 encePairwiseOnDemand]: 184/186 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-06 22:12:54,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-11-06 22:12:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:12:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:12:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-11-06 22:12:54,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283154121863799 [2023-11-06 22:12:54,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-11-06 22:12:54,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-11-06 22:12:54,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:54,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-11-06 22:12:54,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,891 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 239 transitions. [2023-11-06 22:12:54,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-11-06 22:12:54,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:12:54,893 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-06 22:12:54,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, 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} [2023-11-06 22:12:54,897 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 22:12:54,897 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-06 22:12:54,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:54,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:54,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:12:54,899 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)] === [2023-11-06 22:12:54,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1211720636, now seen corresponding path program 1 times [2023-11-06 22:12:54,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:54,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316573934] [2023-11-06 22:12:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:54,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316573934] [2023-11-06 22:12:55,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316573934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:55,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:55,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:12:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51641151] [2023-11-06 22:12:55,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:55,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:12:55,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:12:55,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:12:55,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 186 [2023-11-06 22:12:55,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:55,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 186 [2023-11-06 22:12:55,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:55,089 INFO L124 PetriNetUnfolderBase]: 54/95 cut-off events. [2023-11-06 22:12:55,089 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:55,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 95 events. 54/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 235 event pairs, 9 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 197. Up to 73 conditions per place. [2023-11-06 22:12:55,091 INFO L140 encePairwiseOnDemand]: 182/186 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-11-06 22:12:55,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-11-06 22:12:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:12:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:12:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 333 transitions. [2023-11-06 22:12:55,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475806451612903 [2023-11-06 22:12:55,093 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 333 transitions. [2023-11-06 22:12:55,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 333 transitions. [2023-11-06 22:12:55,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:55,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 333 transitions. [2023-11-06 22:12:55,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,099 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,099 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 333 transitions. [2023-11-06 22:12:55,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-11-06 22:12:55,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:12:55,101 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-11-06 22:12:55,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, 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} [2023-11-06 22:12:55,104 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-11-06 22:12:55,108 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-11-06 22:12:55,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:55,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:55,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:12:55,111 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)] === [2023-11-06 22:12:55,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1420328043, now seen corresponding path program 1 times [2023-11-06 22:12:55,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:55,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747066454] [2023-11-06 22:12:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:55,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:12:55,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:55,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747066454] [2023-11-06 22:12:55,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747066454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:55,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:55,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:12:55,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315040992] [2023-11-06 22:12:55,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:55,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:12:55,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:12:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:12:55,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 186 [2023-11-06 22:12:55,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:55,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 186 [2023-11-06 22:12:55,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:55,271 INFO L124 PetriNetUnfolderBase]: 51/93 cut-off events. [2023-11-06 22:12:55,272 INFO L125 PetriNetUnfolderBase]: For 20/28 co-relation queries the response was YES. [2023-11-06 22:12:55,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 93 events. 51/93 cut-off events. For 20/28 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 24 based on Foata normal form. 8/82 useless extension candidates. Maximal degree in co-relation 235. Up to 73 conditions per place. [2023-11-06 22:12:55,273 INFO L140 encePairwiseOnDemand]: 182/186 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-06 22:12:55,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 118 flow [2023-11-06 22:12:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:12:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:12:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2023-11-06 22:12:55,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-11-06 22:12:55,276 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 341 transitions. [2023-11-06 22:12:55,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 341 transitions. [2023-11-06 22:12:55,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:55,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 341 transitions. [2023-11-06 22:12:55,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,280 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,281 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 4 states and 341 transitions. [2023-11-06 22:12:55,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 118 flow [2023-11-06 22:12:55,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 23 transitions, 109 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:12:55,283 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 60 flow [2023-11-06 22:12:55,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, 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} [2023-11-06 22:12:55,284 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-06 22:12:55,284 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 60 flow [2023-11-06 22:12:55,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:55,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:55,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:12:55,285 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)] === [2023-11-06 22:12:55,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:55,286 INFO L85 PathProgramCache]: Analyzing trace with hash -469301893, now seen corresponding path program 1 times [2023-11-06 22:12:55,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:55,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039624358] [2023-11-06 22:12:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:55,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:12:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:55,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039624358] [2023-11-06 22:12:55,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039624358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:55,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684440853] [2023-11-06 22:12:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:55,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:55,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:55,436 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:55,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:12:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:55,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:12:55,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:12:55,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:55,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684440853] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:55,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:12:55,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2023-11-06 22:12:55,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998929155] [2023-11-06 22:12:55,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:55,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:12:55,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:12:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:12:55,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 186 [2023-11-06 22:12:55,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:55,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:55,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 186 [2023-11-06 22:12:55,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:56,033 INFO L124 PetriNetUnfolderBase]: 84/156 cut-off events. [2023-11-06 22:12:56,033 INFO L125 PetriNetUnfolderBase]: For 33/51 co-relation queries the response was YES. [2023-11-06 22:12:56,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 156 events. 84/156 cut-off events. For 33/51 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 479 event pairs, 6 based on Foata normal form. 19/133 useless extension candidates. Maximal degree in co-relation 431. Up to 61 conditions per place. [2023-11-06 22:12:56,035 INFO L140 encePairwiseOnDemand]: 182/186 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-11-06 22:12:56,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 40 transitions, 210 flow [2023-11-06 22:12:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:12:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:12:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 367 transitions. [2023-11-06 22:12:56,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932795698924731 [2023-11-06 22:12:56,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 367 transitions. [2023-11-06 22:12:56,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 367 transitions. [2023-11-06 22:12:56,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:56,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 367 transitions. [2023-11-06 22:12:56,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:56,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:56,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:56,043 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 60 flow. Second operand 4 states and 367 transitions. [2023-11-06 22:12:56,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 40 transitions, 210 flow [2023-11-06 22:12:56,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 198 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 22:12:56,045 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 98 flow [2023-11-06 22:12:56,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-11-06 22:12:56,046 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-06 22:12:56,046 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 98 flow [2023-11-06 22:12:56,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:56,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:56,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:56,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:12:56,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:56,253 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)] === [2023-11-06 22:12:56,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:56,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1328419947, now seen corresponding path program 2 times [2023-11-06 22:12:56,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:56,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845696276] [2023-11-06 22:12:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:56,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:12:56,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:56,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845696276] [2023-11-06 22:12:56,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845696276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:56,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458944133] [2023-11-06 22:12:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:12:56,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:56,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:56,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:56,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:12:56,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:12:56,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:56,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:12:56,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:12:56,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:12:56,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458944133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:56,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:56,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-06 22:12:56,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712055968] [2023-11-06 22:12:56,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:56,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:12:56,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:56,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:12:56,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:12:56,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 186 [2023-11-06 22:12:56,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 80.8) internal successors, (808), 10 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:56,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:56,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 186 [2023-11-06 22:12:56,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:56,898 INFO L124 PetriNetUnfolderBase]: 132/239 cut-off events. [2023-11-06 22:12:56,898 INFO L125 PetriNetUnfolderBase]: For 221/233 co-relation queries the response was YES. [2023-11-06 22:12:56,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 239 events. 132/239 cut-off events. For 221/233 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 765 event pairs, 32 based on Foata normal form. 26/264 useless extension candidates. Maximal degree in co-relation 767. Up to 190 conditions per place. [2023-11-06 22:12:56,901 INFO L140 encePairwiseOnDemand]: 181/186 looper letters, 30 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-11-06 22:12:56,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 251 flow [2023-11-06 22:12:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:12:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:12:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 420 transitions. [2023-11-06 22:12:56,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2023-11-06 22:12:56,904 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 420 transitions. [2023-11-06 22:12:56,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 420 transitions. [2023-11-06 22:12:56,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:56,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 420 transitions. [2023-11-06 22:12:56,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:56,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:56,910 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:56,911 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 98 flow. Second operand 5 states and 420 transitions. [2023-11-06 22:12:56,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 251 flow [2023-11-06 22:12:56,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 251 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:56,917 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 172 flow [2023-11-06 22:12:56,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-11-06 22:12:56,919 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-11-06 22:12:56,919 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 172 flow [2023-11-06 22:12:56,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.8) internal successors, (808), 10 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:56,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:56,920 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:56,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:57,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:57,126 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)] === [2023-11-06 22:12:57,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:57,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1623433838, now seen corresponding path program 3 times [2023-11-06 22:12:57,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:57,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888141325] [2023-11-06 22:12:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:57,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:57,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888141325] [2023-11-06 22:12:57,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888141325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693128042] [2023-11-06 22:12:57,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:12:57,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:57,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:57,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:57,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:12:57,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:12:57,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:57,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:12:57,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:57,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:57,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693128042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:57,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:57,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 22:12:57,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087769912] [2023-11-06 22:12:57,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:57,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:12:57,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:57,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:12:57,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:12:57,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:12:57,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 172 flow. Second operand has 16 states, 16 states have (on average 75.4375) internal successors, (1207), 16 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:57,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:57,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:12:57,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:58,463 INFO L124 PetriNetUnfolderBase]: 209/372 cut-off events. [2023-11-06 22:12:58,463 INFO L125 PetriNetUnfolderBase]: For 633/633 co-relation queries the response was YES. [2023-11-06 22:12:58,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 372 events. 209/372 cut-off events. For 633/633 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1347 event pairs, 8 based on Foata normal form. 12/384 useless extension candidates. Maximal degree in co-relation 1400. Up to 127 conditions per place. [2023-11-06 22:12:58,467 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 65 selfloop transitions, 43 changer transitions 19/127 dead transitions. [2023-11-06 22:12:58,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 127 transitions, 890 flow [2023-11-06 22:12:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:12:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:12:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1870 transitions. [2023-11-06 22:12:58,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189068100358423 [2023-11-06 22:12:58,476 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1870 transitions. [2023-11-06 22:12:58,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1870 transitions. [2023-11-06 22:12:58,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:58,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1870 transitions. [2023-11-06 22:12:58,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 77.91666666666667) internal successors, (1870), 24 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:58,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 186.0) internal successors, (4650), 25 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:58,497 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 186.0) internal successors, (4650), 25 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:58,497 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 172 flow. Second operand 24 states and 1870 transitions. [2023-11-06 22:12:58,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 127 transitions, 890 flow [2023-11-06 22:12:58,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 127 transitions, 872 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 22:12:58,506 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 527 flow [2023-11-06 22:12:58,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=527, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-11-06 22:12:58,508 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-11-06 22:12:58,508 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 527 flow [2023-11-06 22:12:58,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.4375) internal successors, (1207), 16 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:58,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:58,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:58,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:58,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:58,715 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)] === [2023-11-06 22:12:58,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1609323290, now seen corresponding path program 4 times [2023-11-06 22:12:58,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:58,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530103140] [2023-11-06 22:12:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:58,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:58,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:58,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530103140] [2023-11-06 22:12:58,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530103140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:58,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851626072] [2023-11-06 22:12:58,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:12:58,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:58,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:58,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:58,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:12:58,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:12:58,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:58,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:12:58,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:59,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:59,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851626072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:59,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:59,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:12:59,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303247990] [2023-11-06 22:12:59,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:59,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:12:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:12:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:12:59,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:12:59,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 527 flow. Second operand has 15 states, 15 states have (on average 75.4) internal successors, (1131), 15 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:59,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:59,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:12:59,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:59,664 INFO L124 PetriNetUnfolderBase]: 245/435 cut-off events. [2023-11-06 22:12:59,664 INFO L125 PetriNetUnfolderBase]: For 2271/2271 co-relation queries the response was YES. [2023-11-06 22:12:59,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 435 events. 245/435 cut-off events. For 2271/2271 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1610 event pairs, 11 based on Foata normal form. 30/465 useless extension candidates. Maximal degree in co-relation 2140. Up to 157 conditions per place. [2023-11-06 22:12:59,671 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 75 selfloop transitions, 62 changer transitions 0/137 dead transitions. [2023-11-06 22:12:59,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 137 transitions, 1308 flow [2023-11-06 22:12:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:12:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:12:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1480 transitions. [2023-11-06 22:12:59,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187889077532541 [2023-11-06 22:12:59,678 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1480 transitions. [2023-11-06 22:12:59,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1480 transitions. [2023-11-06 22:12:59,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:59,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1480 transitions. [2023-11-06 22:12:59,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 77.89473684210526) internal successors, (1480), 19 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:59,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:59,693 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:59,693 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 527 flow. Second operand 19 states and 1480 transitions. [2023-11-06 22:12:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 137 transitions, 1308 flow [2023-11-06 22:12:59,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1057 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-11-06 22:12:59,708 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 853 flow [2023-11-06 22:12:59,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=853, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2023-11-06 22:12:59,709 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2023-11-06 22:12:59,709 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 853 flow [2023-11-06 22:12:59,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 75.4) internal successors, (1131), 15 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:59,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:59,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:59,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:59,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:12:59,916 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)] === [2023-11-06 22:12:59,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash 214250960, now seen corresponding path program 5 times [2023-11-06 22:12:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:59,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469232202] [2023-11-06 22:12:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:00,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:00,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469232202] [2023-11-06 22:13:00,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469232202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:00,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72339814] [2023-11-06 22:13:00,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:13:00,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:00,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:00,056 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:00,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:13:00,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:13:00,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:00,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:13:00,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:00,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:00,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72339814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:00,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:00,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:13:00,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085835869] [2023-11-06 22:13:00,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:00,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:13:00,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:13:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:13:00,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:00,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 853 flow. Second operand has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:00,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:00,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:00,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:00,925 INFO L124 PetriNetUnfolderBase]: 345/637 cut-off events. [2023-11-06 22:13:00,925 INFO L125 PetriNetUnfolderBase]: For 7856/7856 co-relation queries the response was YES. [2023-11-06 22:13:00,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3346 conditions, 637 events. 345/637 cut-off events. For 7856/7856 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2817 event pairs, 11 based on Foata normal form. 30/667 useless extension candidates. Maximal degree in co-relation 3320. Up to 215 conditions per place. [2023-11-06 22:13:00,935 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 82 selfloop transitions, 98 changer transitions 1/181 dead transitions. [2023-11-06 22:13:00,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 181 transitions, 1827 flow [2023-11-06 22:13:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:13:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:13:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1712 transitions. [2023-11-06 22:13:00,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41837732160312807 [2023-11-06 22:13:00,942 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1712 transitions. [2023-11-06 22:13:00,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1712 transitions. [2023-11-06 22:13:00,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:00,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1712 transitions. [2023-11-06 22:13:00,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 77.81818181818181) internal successors, (1712), 22 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:00,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 186.0) internal successors, (4278), 23 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:00,959 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 186.0) internal successors, (4278), 23 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:00,959 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 853 flow. Second operand 22 states and 1712 transitions. [2023-11-06 22:13:00,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 181 transitions, 1827 flow [2023-11-06 22:13:00,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 181 transitions, 1709 flow, removed 59 selfloop flow, removed 0 redundant places. [2023-11-06 22:13:00,995 INFO L231 Difference]: Finished difference. Result has 113 places, 133 transitions, 1393 flow [2023-11-06 22:13:00,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1393, PETRI_PLACES=113, PETRI_TRANSITIONS=133} [2023-11-06 22:13:00,996 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-11-06 22:13:00,996 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 133 transitions, 1393 flow [2023-11-06 22:13:00,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:00,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:00,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:01,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:01,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:13:01,203 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)] === [2023-11-06 22:13:01,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash -643434278, now seen corresponding path program 6 times [2023-11-06 22:13:01,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:01,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761341780] [2023-11-06 22:13:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:01,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:01,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:01,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761341780] [2023-11-06 22:13:01,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761341780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:01,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782569204] [2023-11-06 22:13:01,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:13:01,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:01,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:01,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:01,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:13:01,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:13:01,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:01,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:13:01,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:01,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:01,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782569204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:01,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:01,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 22:13:01,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556344353] [2023-11-06 22:13:01,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:01,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:13:01,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:01,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:13:01,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:13:01,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:01,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 133 transitions, 1393 flow. Second operand has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:01,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:01,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:01,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:02,282 INFO L124 PetriNetUnfolderBase]: 337/601 cut-off events. [2023-11-06 22:13:02,282 INFO L125 PetriNetUnfolderBase]: For 8119/8119 co-relation queries the response was YES. [2023-11-06 22:13:02,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3730 conditions, 601 events. 337/601 cut-off events. For 8119/8119 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2527 event pairs, 14 based on Foata normal form. 6/607 useless extension candidates. Maximal degree in co-relation 3695. Up to 304 conditions per place. [2023-11-06 22:13:02,296 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 79 selfloop transitions, 84 changer transitions 4/167 dead transitions. [2023-11-06 22:13:02,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 167 transitions, 2052 flow [2023-11-06 22:13:02,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:13:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:13:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1239 transitions. [2023-11-06 22:13:02,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4163306451612903 [2023-11-06 22:13:02,303 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1239 transitions. [2023-11-06 22:13:02,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1239 transitions. [2023-11-06 22:13:02,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:02,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1239 transitions. [2023-11-06 22:13:02,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 77.4375) internal successors, (1239), 16 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:02,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:02,319 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:02,319 INFO L175 Difference]: Start difference. First operand has 113 places, 133 transitions, 1393 flow. Second operand 16 states and 1239 transitions. [2023-11-06 22:13:02,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 167 transitions, 2052 flow [2023-11-06 22:13:02,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 167 transitions, 1906 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-11-06 22:13:02,360 INFO L231 Difference]: Finished difference. Result has 122 places, 136 transitions, 1591 flow [2023-11-06 22:13:02,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1591, PETRI_PLACES=122, PETRI_TRANSITIONS=136} [2023-11-06 22:13:02,361 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 93 predicate places. [2023-11-06 22:13:02,361 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 136 transitions, 1591 flow [2023-11-06 22:13:02,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:02,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:02,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:02,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:02,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:02,570 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)] === [2023-11-06 22:13:02,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash -21563904, now seen corresponding path program 7 times [2023-11-06 22:13:02,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:02,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819897704] [2023-11-06 22:13:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:02,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:02,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:02,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819897704] [2023-11-06 22:13:02,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819897704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:02,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722939099] [2023-11-06 22:13:02,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:13:02,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:02,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:02,778 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:02,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:13:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:02,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:13:02,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:02,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:03,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722939099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:03,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:03,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-06 22:13:03,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937452602] [2023-11-06 22:13:03,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:03,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:13:03,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:13:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:13:03,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:03,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 136 transitions, 1591 flow. Second operand has 18 states, 18 states have (on average 75.33333333333333) internal successors, (1356), 18 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:03,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:03,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:03,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:04,131 INFO L124 PetriNetUnfolderBase]: 484/854 cut-off events. [2023-11-06 22:13:04,132 INFO L125 PetriNetUnfolderBase]: For 9504/9504 co-relation queries the response was YES. [2023-11-06 22:13:04,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5359 conditions, 854 events. 484/854 cut-off events. For 9504/9504 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3928 event pairs, 13 based on Foata normal form. 10/864 useless extension candidates. Maximal degree in co-relation 5323. Up to 262 conditions per place. [2023-11-06 22:13:04,195 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 109 selfloop transitions, 146 changer transitions 0/255 dead transitions. [2023-11-06 22:13:04,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 255 transitions, 3194 flow [2023-11-06 22:13:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:13:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:13:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2240 transitions. [2023-11-06 22:13:04,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41527623285131626 [2023-11-06 22:13:04,202 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2240 transitions. [2023-11-06 22:13:04,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2240 transitions. [2023-11-06 22:13:04,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:04,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2240 transitions. [2023-11-06 22:13:04,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 77.24137931034483) internal successors, (2240), 29 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:04,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:04,223 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:04,223 INFO L175 Difference]: Start difference. First operand has 122 places, 136 transitions, 1591 flow. Second operand 29 states and 2240 transitions. [2023-11-06 22:13:04,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 255 transitions, 3194 flow [2023-11-06 22:13:04,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 255 transitions, 2924 flow, removed 55 selfloop flow, removed 10 redundant places. [2023-11-06 22:13:04,269 INFO L231 Difference]: Finished difference. Result has 146 places, 202 transitions, 2645 flow [2023-11-06 22:13:04,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2645, PETRI_PLACES=146, PETRI_TRANSITIONS=202} [2023-11-06 22:13:04,270 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2023-11-06 22:13:04,270 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 202 transitions, 2645 flow [2023-11-06 22:13:04,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.33333333333333) internal successors, (1356), 18 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:04,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:04,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:04,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:04,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:04,477 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)] === [2023-11-06 22:13:04,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1850520744, now seen corresponding path program 8 times [2023-11-06 22:13:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:04,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526644606] [2023-11-06 22:13:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:04,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526644606] [2023-11-06 22:13:04,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526644606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106546268] [2023-11-06 22:13:04,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:13:04,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:04,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:04,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:04,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:13:04,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:13:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:04,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:13:04,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:04,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:13:04,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106546268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:04,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:04,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:13:04,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763066986] [2023-11-06 22:13:04,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:04,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:13:04,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:04,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:13:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:13:05,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:05,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 202 transitions, 2645 flow. Second operand has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:05,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:05,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:05,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:05,646 INFO L124 PetriNetUnfolderBase]: 550/994 cut-off events. [2023-11-06 22:13:05,646 INFO L125 PetriNetUnfolderBase]: For 16927/16927 co-relation queries the response was YES. [2023-11-06 22:13:05,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6844 conditions, 994 events. 550/994 cut-off events. For 16927/16927 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4899 event pairs, 29 based on Foata normal form. 30/1024 useless extension candidates. Maximal degree in co-relation 6801. Up to 725 conditions per place. [2023-11-06 22:13:05,664 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 204 selfloop transitions, 63 changer transitions 1/268 dead transitions. [2023-11-06 22:13:05,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 268 transitions, 3794 flow [2023-11-06 22:13:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:13:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:13:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1555 transitions. [2023-11-06 22:13:05,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41801075268817206 [2023-11-06 22:13:05,668 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1555 transitions. [2023-11-06 22:13:05,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1555 transitions. [2023-11-06 22:13:05,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:05,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1555 transitions. [2023-11-06 22:13:05,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 77.75) internal successors, (1555), 20 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:05,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 186.0) internal successors, (3906), 21 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:05,680 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 186.0) internal successors, (3906), 21 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:05,680 INFO L175 Difference]: Start difference. First operand has 146 places, 202 transitions, 2645 flow. Second operand 20 states and 1555 transitions. [2023-11-06 22:13:05,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 268 transitions, 3794 flow [2023-11-06 22:13:05,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 268 transitions, 3608 flow, removed 45 selfloop flow, removed 14 redundant places. [2023-11-06 22:13:05,758 INFO L231 Difference]: Finished difference. Result has 158 places, 223 transitions, 2970 flow [2023-11-06 22:13:05,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2970, PETRI_PLACES=158, PETRI_TRANSITIONS=223} [2023-11-06 22:13:05,759 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2023-11-06 22:13:05,759 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 223 transitions, 2970 flow [2023-11-06 22:13:05,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:05,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:05,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:05,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:05,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:13:05,967 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)] === [2023-11-06 22:13:05,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1586761314, now seen corresponding path program 9 times [2023-11-06 22:13:05,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:05,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606649889] [2023-11-06 22:13:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:05,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:06,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:06,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606649889] [2023-11-06 22:13:06,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606649889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145125135] [2023-11-06 22:13:06,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:13:06,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:06,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:06,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:06,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:13:06,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:13:06,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:06,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:13:06,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:06,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:06,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145125135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:06,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:06,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:13:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633877789] [2023-11-06 22:13:06,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:06,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:13:06,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:13:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:13:06,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:06,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 223 transitions, 2970 flow. Second operand has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:06,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:06,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:06,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:07,050 INFO L124 PetriNetUnfolderBase]: 532/944 cut-off events. [2023-11-06 22:13:07,050 INFO L125 PetriNetUnfolderBase]: For 14675/14675 co-relation queries the response was YES. [2023-11-06 22:13:07,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6762 conditions, 944 events. 532/944 cut-off events. For 14675/14675 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4533 event pairs, 31 based on Foata normal form. 6/950 useless extension candidates. Maximal degree in co-relation 6713. Up to 754 conditions per place. [2023-11-06 22:13:07,070 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 188 selfloop transitions, 56 changer transitions 4/248 dead transitions. [2023-11-06 22:13:07,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 248 transitions, 3719 flow [2023-11-06 22:13:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:13:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:13:07,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1082 transitions. [2023-11-06 22:13:07,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41551459293394777 [2023-11-06 22:13:07,074 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1082 transitions. [2023-11-06 22:13:07,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1082 transitions. [2023-11-06 22:13:07,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:07,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1082 transitions. [2023-11-06 22:13:07,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 77.28571428571429) internal successors, (1082), 14 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:07,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 186.0) internal successors, (2790), 15 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:07,084 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 186.0) internal successors, (2790), 15 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:07,084 INFO L175 Difference]: Start difference. First operand has 158 places, 223 transitions, 2970 flow. Second operand 14 states and 1082 transitions. [2023-11-06 22:13:07,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 248 transitions, 3719 flow [2023-11-06 22:13:07,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 248 transitions, 3562 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-11-06 22:13:07,202 INFO L231 Difference]: Finished difference. Result has 164 places, 223 transitions, 2977 flow [2023-11-06 22:13:07,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2977, PETRI_PLACES=164, PETRI_TRANSITIONS=223} [2023-11-06 22:13:07,203 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 135 predicate places. [2023-11-06 22:13:07,204 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 223 transitions, 2977 flow [2023-11-06 22:13:07,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:07,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:07,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:07,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:07,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:13:07,410 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)] === [2023-11-06 22:13:07,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2039573150, now seen corresponding path program 10 times [2023-11-06 22:13:07,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:07,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767197829] [2023-11-06 22:13:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:07,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:07,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:07,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767197829] [2023-11-06 22:13:07,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767197829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:07,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907182350] [2023-11-06 22:13:07,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:13:07,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:07,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:07,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:07,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:13:07,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:13:07,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:07,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:13:07,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:07,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:07,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907182350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:07,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:07,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2023-11-06 22:13:07,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84949466] [2023-11-06 22:13:07,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:07,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:13:07,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:13:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:13:07,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 186 [2023-11-06 22:13:07,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 223 transitions, 2977 flow. Second operand has 10 states, 10 states have (on average 81.2) internal successors, (812), 10 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:07,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:07,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 186 [2023-11-06 22:13:07,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:08,471 INFO L124 PetriNetUnfolderBase]: 765/1342 cut-off events. [2023-11-06 22:13:08,472 INFO L125 PetriNetUnfolderBase]: For 24186/24186 co-relation queries the response was YES. [2023-11-06 22:13:08,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9836 conditions, 1342 events. 765/1342 cut-off events. For 24186/24186 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6995 event pairs, 32 based on Foata normal form. 1/1340 useless extension candidates. Maximal degree in co-relation 9786. Up to 705 conditions per place. [2023-11-06 22:13:08,500 INFO L140 encePairwiseOnDemand]: 182/186 looper letters, 216 selfloop transitions, 88 changer transitions 38/345 dead transitions. [2023-11-06 22:13:08,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 345 transitions, 5246 flow [2023-11-06 22:13:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:13:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:13:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 521 transitions. [2023-11-06 22:13:08,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668458781362007 [2023-11-06 22:13:08,505 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 521 transitions. [2023-11-06 22:13:08,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 521 transitions. [2023-11-06 22:13:08,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:08,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 521 transitions. [2023-11-06 22:13:08,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:08,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:08,511 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:08,511 INFO L175 Difference]: Start difference. First operand has 164 places, 223 transitions, 2977 flow. Second operand 6 states and 521 transitions. [2023-11-06 22:13:08,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 345 transitions, 5246 flow [2023-11-06 22:13:08,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 345 transitions, 4916 flow, removed 85 selfloop flow, removed 11 redundant places. [2023-11-06 22:13:08,646 INFO L231 Difference]: Finished difference. Result has 160 places, 266 transitions, 3760 flow [2023-11-06 22:13:08,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2799, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3760, PETRI_PLACES=160, PETRI_TRANSITIONS=266} [2023-11-06 22:13:08,647 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2023-11-06 22:13:08,648 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 266 transitions, 3760 flow [2023-11-06 22:13:08,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.2) internal successors, (812), 10 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:08,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:08,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:08,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:08,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:13:08,856 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)] === [2023-11-06 22:13:08,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1633594544, now seen corresponding path program 11 times [2023-11-06 22:13:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:08,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297788054] [2023-11-06 22:13:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:08,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:09,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297788054] [2023-11-06 22:13:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297788054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497276087] [2023-11-06 22:13:09,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:13:09,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:09,075 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:09,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:13:09,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:13:09,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:09,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:13:09,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:13:09,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:13:09,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497276087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:09,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:09,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2023-11-06 22:13:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229511791] [2023-11-06 22:13:09,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:09,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:13:09,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:13:09,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:13:09,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:09,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 266 transitions, 3760 flow. Second operand has 13 states, 13 states have (on average 75.61538461538461) internal successors, (983), 13 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:09,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:09,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:09,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:10,171 INFO L124 PetriNetUnfolderBase]: 749/1344 cut-off events. [2023-11-06 22:13:10,172 INFO L125 PetriNetUnfolderBase]: For 34090/34090 co-relation queries the response was YES. [2023-11-06 22:13:10,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10287 conditions, 1344 events. 749/1344 cut-off events. For 34090/34090 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7167 event pairs, 61 based on Foata normal form. 34/1378 useless extension candidates. Maximal degree in co-relation 10234. Up to 1015 conditions per place. [2023-11-06 22:13:10,204 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 240 selfloop transitions, 81 changer transitions 15/336 dead transitions. [2023-11-06 22:13:10,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 336 transitions, 5166 flow [2023-11-06 22:13:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:13:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:13:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1491 transitions. [2023-11-06 22:13:10,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219015280135823 [2023-11-06 22:13:10,208 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1491 transitions. [2023-11-06 22:13:10,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1491 transitions. [2023-11-06 22:13:10,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:10,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1491 transitions. [2023-11-06 22:13:10,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 78.47368421052632) internal successors, (1491), 19 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:10,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:10,220 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:10,220 INFO L175 Difference]: Start difference. First operand has 160 places, 266 transitions, 3760 flow. Second operand 19 states and 1491 transitions. [2023-11-06 22:13:10,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 336 transitions, 5166 flow [2023-11-06 22:13:10,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 336 transitions, 5089 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-11-06 22:13:10,351 INFO L231 Difference]: Finished difference. Result has 182 places, 281 transitions, 4255 flow [2023-11-06 22:13:10,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=3711, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4255, PETRI_PLACES=182, PETRI_TRANSITIONS=281} [2023-11-06 22:13:10,352 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 153 predicate places. [2023-11-06 22:13:10,352 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 281 transitions, 4255 flow [2023-11-06 22:13:10,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 75.61538461538461) internal successors, (983), 13 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:10,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:10,353 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:10,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:10,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:13:10,559 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)] === [2023-11-06 22:13:10,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1888967279, now seen corresponding path program 12 times [2023-11-06 22:13:10,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:10,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391001955] [2023-11-06 22:13:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:10,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:10,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391001955] [2023-11-06 22:13:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391001955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040310306] [2023-11-06 22:13:10,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:13:10,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:10,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:10,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:10,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:13:10,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:13:10,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:10,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:13:10,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:11,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:11,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040310306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:11,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:11,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-06 22:13:11,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324229861] [2023-11-06 22:13:11,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:11,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:13:11,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:11,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:13:11,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:13:11,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:11,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 281 transitions, 4255 flow. Second operand has 21 states, 21 states have (on average 75.19047619047619) internal successors, (1579), 21 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:11,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:11,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:11,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:12,967 INFO L124 PetriNetUnfolderBase]: 998/1785 cut-off events. [2023-11-06 22:13:12,968 INFO L125 PetriNetUnfolderBase]: For 50130/50130 co-relation queries the response was YES. [2023-11-06 22:13:12,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14435 conditions, 1785 events. 998/1785 cut-off events. For 50130/50130 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10004 event pairs, 6 based on Foata normal form. 18/1803 useless extension candidates. Maximal degree in co-relation 14376. Up to 521 conditions per place. [2023-11-06 22:13:13,007 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 133 selfloop transitions, 330 changer transitions 30/493 dead transitions. [2023-11-06 22:13:13,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 493 transitions, 7969 flow [2023-11-06 22:13:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:13:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:13:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2641 transitions. [2023-11-06 22:13:13,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176154332700822 [2023-11-06 22:13:13,017 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2641 transitions. [2023-11-06 22:13:13,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2641 transitions. [2023-11-06 22:13:13,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:13,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2641 transitions. [2023-11-06 22:13:13,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 77.67647058823529) internal successors, (2641), 34 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:13,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 186.0) internal successors, (6510), 35 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:13,041 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 186.0) internal successors, (6510), 35 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:13,042 INFO L175 Difference]: Start difference. First operand has 182 places, 281 transitions, 4255 flow. Second operand 34 states and 2641 transitions. [2023-11-06 22:13:13,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 493 transitions, 7969 flow [2023-11-06 22:13:13,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 493 transitions, 7819 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-11-06 22:13:13,232 INFO L231 Difference]: Finished difference. Result has 217 places, 387 transitions, 6814 flow [2023-11-06 22:13:13,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6814, PETRI_PLACES=217, PETRI_TRANSITIONS=387} [2023-11-06 22:13:13,234 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 188 predicate places. [2023-11-06 22:13:13,234 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 387 transitions, 6814 flow [2023-11-06 22:13:13,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.19047619047619) internal successors, (1579), 21 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:13,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:13,235 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:13,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 22:13:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:13,442 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)] === [2023-11-06 22:13:13,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1907524331, now seen corresponding path program 13 times [2023-11-06 22:13:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:13,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146528009] [2023-11-06 22:13:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:13,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:13,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146528009] [2023-11-06 22:13:13,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146528009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:13,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796717313] [2023-11-06 22:13:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:13:13,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:13,669 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:13,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:13:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:13,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:13:13,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:13,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796717313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:14,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:14,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-06 22:13:14,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633672606] [2023-11-06 22:13:14,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:14,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:13:14,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:14,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:13:14,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:13:14,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:14,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 387 transitions, 6814 flow. Second operand has 22 states, 22 states have (on average 74.9090909090909) internal successors, (1648), 22 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:14,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:14,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:14,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:15,679 INFO L124 PetriNetUnfolderBase]: 1115/1928 cut-off events. [2023-11-06 22:13:15,679 INFO L125 PetriNetUnfolderBase]: For 73794/73794 co-relation queries the response was YES. [2023-11-06 22:13:15,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17664 conditions, 1928 events. 1115/1928 cut-off events. For 73794/73794 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10390 event pairs, 17 based on Foata normal form. 32/1960 useless extension candidates. Maximal degree in co-relation 17595. Up to 662 conditions per place. [2023-11-06 22:13:15,714 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 152 selfloop transitions, 368 changer transitions 2/522 dead transitions. [2023-11-06 22:13:15,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 522 transitions, 9701 flow [2023-11-06 22:13:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:13:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:13:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2479 transitions. [2023-11-06 22:13:15,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164986559139785 [2023-11-06 22:13:15,721 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2479 transitions. [2023-11-06 22:13:15,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2479 transitions. [2023-11-06 22:13:15,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:15,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2479 transitions. [2023-11-06 22:13:15,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 77.46875) internal successors, (2479), 32 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:15,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 186.0) internal successors, (6138), 33 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:15,738 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 186.0) internal successors, (6138), 33 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:15,739 INFO L175 Difference]: Start difference. First operand has 217 places, 387 transitions, 6814 flow. Second operand 32 states and 2479 transitions. [2023-11-06 22:13:15,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 522 transitions, 9701 flow [2023-11-06 22:13:16,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 522 transitions, 9216 flow, removed 217 selfloop flow, removed 9 redundant places. [2023-11-06 22:13:16,137 INFO L231 Difference]: Finished difference. Result has 248 places, 456 transitions, 8765 flow [2023-11-06 22:13:16,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8765, PETRI_PLACES=248, PETRI_TRANSITIONS=456} [2023-11-06 22:13:16,138 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 219 predicate places. [2023-11-06 22:13:16,138 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 456 transitions, 8765 flow [2023-11-06 22:13:16,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 74.9090909090909) internal successors, (1648), 22 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:16,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:16,138 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:16,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:16,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:16,339 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)] === [2023-11-06 22:13:16,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1751177377, now seen corresponding path program 14 times [2023-11-06 22:13:16,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:16,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701984255] [2023-11-06 22:13:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:16,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:16,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701984255] [2023-11-06 22:13:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701984255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393921217] [2023-11-06 22:13:16,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:13:16,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:16,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:16,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:16,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:13:16,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:13:16,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:16,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:13:16,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:16,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393921217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:16,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:16,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-06 22:13:16,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456305297] [2023-11-06 22:13:16,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:16,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:13:16,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:13:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:13:17,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:17,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 456 transitions, 8765 flow. Second operand has 21 states, 21 states have (on average 74.95238095238095) internal successors, (1574), 21 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:17,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:17,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:17,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:18,673 INFO L124 PetriNetUnfolderBase]: 1298/2209 cut-off events. [2023-11-06 22:13:18,674 INFO L125 PetriNetUnfolderBase]: For 111238/111238 co-relation queries the response was YES. [2023-11-06 22:13:18,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22895 conditions, 2209 events. 1298/2209 cut-off events. For 111238/111238 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12085 event pairs, 36 based on Foata normal form. 36/2245 useless extension candidates. Maximal degree in co-relation 22815. Up to 1051 conditions per place. [2023-11-06 22:13:18,714 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 169 selfloop transitions, 416 changer transitions 7/592 dead transitions. [2023-11-06 22:13:18,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 592 transitions, 12850 flow [2023-11-06 22:13:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:13:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:13:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2086 transitions. [2023-11-06 22:13:18,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41537236160892077 [2023-11-06 22:13:18,721 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2086 transitions. [2023-11-06 22:13:18,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2086 transitions. [2023-11-06 22:13:18,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:18,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2086 transitions. [2023-11-06 22:13:18,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 77.25925925925925) internal successors, (2086), 27 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:18,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 186.0) internal successors, (5208), 28 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:18,737 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 186.0) internal successors, (5208), 28 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:18,737 INFO L175 Difference]: Start difference. First operand has 248 places, 456 transitions, 8765 flow. Second operand 27 states and 2086 transitions. [2023-11-06 22:13:18,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 592 transitions, 12850 flow [2023-11-06 22:13:19,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 592 transitions, 12619 flow, removed 78 selfloop flow, removed 10 redundant places. [2023-11-06 22:13:19,252 INFO L231 Difference]: Finished difference. Result has 267 places, 545 transitions, 11977 flow [2023-11-06 22:13:19,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=8536, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11977, PETRI_PLACES=267, PETRI_TRANSITIONS=545} [2023-11-06 22:13:19,253 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 238 predicate places. [2023-11-06 22:13:19,253 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 545 transitions, 11977 flow [2023-11-06 22:13:19,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 74.95238095238095) internal successors, (1574), 21 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:19,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:19,254 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:19,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 22:13:19,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:13:19,461 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)] === [2023-11-06 22:13:19,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:19,461 INFO L85 PathProgramCache]: Analyzing trace with hash -982346199, now seen corresponding path program 15 times [2023-11-06 22:13:19,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:19,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514901488] [2023-11-06 22:13:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:19,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:19,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514901488] [2023-11-06 22:13:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514901488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464013989] [2023-11-06 22:13:19,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:13:19,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:19,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:19,652 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:19,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:13:19,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:13:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:19,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:13:19,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:19,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464013989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:20,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:20,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-06 22:13:20,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303197613] [2023-11-06 22:13:20,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:20,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:13:20,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:13:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:13:20,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:20,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 545 transitions, 11977 flow. Second operand has 22 states, 22 states have (on average 75.04545454545455) internal successors, (1651), 22 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:20,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:20,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:20,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:21,952 INFO L124 PetriNetUnfolderBase]: 1326/2301 cut-off events. [2023-11-06 22:13:21,952 INFO L125 PetriNetUnfolderBase]: For 145248/145248 co-relation queries the response was YES. [2023-11-06 22:13:21,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23750 conditions, 2301 events. 1326/2301 cut-off events. For 145248/145248 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13038 event pairs, 17 based on Foata normal form. 58/2359 useless extension candidates. Maximal degree in co-relation 23667. Up to 752 conditions per place. [2023-11-06 22:13:21,984 INFO L140 encePairwiseOnDemand]: 178/186 looper letters, 127 selfloop transitions, 491 changer transitions 6/624 dead transitions. [2023-11-06 22:13:21,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 624 transitions, 13724 flow [2023-11-06 22:13:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:13:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:13:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2785 transitions. [2023-11-06 22:13:21,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159199522102748 [2023-11-06 22:13:21,990 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2785 transitions. [2023-11-06 22:13:21,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2785 transitions. [2023-11-06 22:13:21,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:21,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2785 transitions. [2023-11-06 22:13:21,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 77.36111111111111) internal successors, (2785), 36 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:22,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 186.0) internal successors, (6882), 37 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:22,006 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 186.0) internal successors, (6882), 37 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:22,006 INFO L175 Difference]: Start difference. First operand has 267 places, 545 transitions, 11977 flow. Second operand 36 states and 2785 transitions. [2023-11-06 22:13:22,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 624 transitions, 13724 flow [2023-11-06 22:13:22,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 624 transitions, 12765 flow, removed 347 selfloop flow, removed 15 redundant places. [2023-11-06 22:13:22,865 INFO L231 Difference]: Finished difference. Result has 287 places, 561 transitions, 12311 flow [2023-11-06 22:13:22,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=10526, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=12311, PETRI_PLACES=287, PETRI_TRANSITIONS=561} [2023-11-06 22:13:22,866 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 258 predicate places. [2023-11-06 22:13:22,867 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 561 transitions, 12311 flow [2023-11-06 22:13:22,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.04545454545455) internal successors, (1651), 22 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:22,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:22,867 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:22,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-06 22:13:23,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:23,068 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:13:23,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1424803281, now seen corresponding path program 16 times [2023-11-06 22:13:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202023737] [2023-11-06 22:13:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:23,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202023737] [2023-11-06 22:13:23,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202023737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397074281] [2023-11-06 22:13:23,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:13:23,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:23,281 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:23,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:13:23,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:13:23,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:23,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:13:23,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:23,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:23,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397074281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:23,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:23,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-06 22:13:23,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093815731] [2023-11-06 22:13:23,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:23,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:13:23,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:23,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:13:23,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:13:23,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:23,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 561 transitions, 12311 flow. Second operand has 20 states, 20 states have (on average 74.95) internal successors, (1499), 20 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:23,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:23,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:23,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:25,380 INFO L124 PetriNetUnfolderBase]: 1488/2567 cut-off events. [2023-11-06 22:13:25,380 INFO L125 PetriNetUnfolderBase]: For 41705/41705 co-relation queries the response was YES. [2023-11-06 22:13:25,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24742 conditions, 2567 events. 1488/2567 cut-off events. For 41705/41705 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 14801 event pairs, 15 based on Foata normal form. 26/2593 useless extension candidates. Maximal degree in co-relation 24662. Up to 641 conditions per place. [2023-11-06 22:13:25,409 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 325 selfloop transitions, 407 changer transitions 12/744 dead transitions. [2023-11-06 22:13:25,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 744 transitions, 16695 flow [2023-11-06 22:13:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:13:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 22:13:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3013 transitions. [2023-11-06 22:13:25,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41535704438930243 [2023-11-06 22:13:25,416 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3013 transitions. [2023-11-06 22:13:25,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3013 transitions. [2023-11-06 22:13:25,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:25,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3013 transitions. [2023-11-06 22:13:25,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 77.25641025641026) internal successors, (3013), 39 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:25,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 186.0) internal successors, (7440), 40 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:25,426 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 186.0) internal successors, (7440), 40 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:25,426 INFO L175 Difference]: Start difference. First operand has 287 places, 561 transitions, 12311 flow. Second operand 39 states and 3013 transitions. [2023-11-06 22:13:25,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 744 transitions, 16695 flow [2023-11-06 22:13:25,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 744 transitions, 16092 flow, removed 80 selfloop flow, removed 22 redundant places. [2023-11-06 22:13:25,924 INFO L231 Difference]: Finished difference. Result has 313 places, 636 transitions, 14710 flow [2023-11-06 22:13:25,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=11754, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14710, PETRI_PLACES=313, PETRI_TRANSITIONS=636} [2023-11-06 22:13:25,925 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 284 predicate places. [2023-11-06 22:13:25,925 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 636 transitions, 14710 flow [2023-11-06 22:13:25,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 74.95) internal successors, (1499), 20 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:25,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:25,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:25,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 22:13:26,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:13:26,131 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:13:26,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash -557925929, now seen corresponding path program 17 times [2023-11-06 22:13:26,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:26,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310071184] [2023-11-06 22:13:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:26,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:26,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:26,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310071184] [2023-11-06 22:13:26,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310071184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:26,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330750513] [2023-11-06 22:13:26,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:13:26,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:26,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:26,325 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:26,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:13:26,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:13:26,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:26,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:13:26,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:26,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330750513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:26,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:26,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 22:13:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753369338] [2023-11-06 22:13:26,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:26,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:13:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:26,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:13:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:13:26,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:26,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 636 transitions, 14710 flow. Second operand has 23 states, 23 states have (on average 75.04347826086956) internal successors, (1726), 23 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:26,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:26,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:26,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:28,999 INFO L124 PetriNetUnfolderBase]: 1722/2981 cut-off events. [2023-11-06 22:13:28,999 INFO L125 PetriNetUnfolderBase]: For 48860/48860 co-relation queries the response was YES. [2023-11-06 22:13:29,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29573 conditions, 2981 events. 1722/2981 cut-off events. For 48860/48860 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17792 event pairs, 25 based on Foata normal form. 12/2993 useless extension candidates. Maximal degree in co-relation 29486. Up to 881 conditions per place. [2023-11-06 22:13:29,035 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 252 selfloop transitions, 568 changer transitions 0/820 dead transitions. [2023-11-06 22:13:29,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 820 transitions, 19216 flow [2023-11-06 22:13:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:13:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:13:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2860 transitions. [2023-11-06 22:13:29,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41557686718977044 [2023-11-06 22:13:29,041 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2860 transitions. [2023-11-06 22:13:29,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2860 transitions. [2023-11-06 22:13:29,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:29,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2860 transitions. [2023-11-06 22:13:29,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 77.29729729729729) internal successors, (2860), 37 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:29,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 186.0) internal successors, (7068), 38 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:29,056 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 186.0) internal successors, (7068), 38 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:29,056 INFO L175 Difference]: Start difference. First operand has 313 places, 636 transitions, 14710 flow. Second operand 37 states and 2860 transitions. [2023-11-06 22:13:29,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 820 transitions, 19216 flow [2023-11-06 22:13:29,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 820 transitions, 18667 flow, removed 103 selfloop flow, removed 22 redundant places. [2023-11-06 22:13:29,676 INFO L231 Difference]: Finished difference. Result has 333 places, 746 transitions, 18238 flow [2023-11-06 22:13:29,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=14265, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18238, PETRI_PLACES=333, PETRI_TRANSITIONS=746} [2023-11-06 22:13:29,677 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 304 predicate places. [2023-11-06 22:13:29,677 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 746 transitions, 18238 flow [2023-11-06 22:13:29,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.04347826086956) internal successors, (1726), 23 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:29,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:29,677 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:29,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-06 22:13:29,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:29,878 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:13:29,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:29,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1728729351, now seen corresponding path program 18 times [2023-11-06 22:13:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:29,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121103810] [2023-11-06 22:13:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:29,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:30,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:30,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121103810] [2023-11-06 22:13:30,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121103810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:30,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771213524] [2023-11-06 22:13:30,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:13:30,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:30,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:30,095 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:30,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:13:30,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:13:30,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:30,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:13:30,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:30,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771213524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:30,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:30,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 22:13:30,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14130961] [2023-11-06 22:13:30,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:30,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:13:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:13:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:13:30,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:30,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 746 transitions, 18238 flow. Second operand has 23 states, 23 states have (on average 75.1304347826087) internal successors, (1728), 23 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:30,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:30,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:30,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:32,863 INFO L124 PetriNetUnfolderBase]: 2064/3569 cut-off events. [2023-11-06 22:13:32,863 INFO L125 PetriNetUnfolderBase]: For 64712/64712 co-relation queries the response was YES. [2023-11-06 22:13:32,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37024 conditions, 3569 events. 2064/3569 cut-off events. For 64712/64712 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22171 event pairs, 15 based on Foata normal form. 34/3603 useless extension candidates. Maximal degree in co-relation 36936. Up to 945 conditions per place. [2023-11-06 22:13:32,903 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 193 selfloop transitions, 771 changer transitions 12/976 dead transitions. [2023-11-06 22:13:32,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 976 transitions, 24683 flow [2023-11-06 22:13:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:13:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:13:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2781 transitions. [2023-11-06 22:13:32,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2023-11-06 22:13:32,909 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2781 transitions. [2023-11-06 22:13:32,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2781 transitions. [2023-11-06 22:13:32,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:32,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2781 transitions. [2023-11-06 22:13:32,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 77.25) internal successors, (2781), 36 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:32,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 186.0) internal successors, (6882), 37 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:32,922 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 186.0) internal successors, (6882), 37 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:32,922 INFO L175 Difference]: Start difference. First operand has 333 places, 746 transitions, 18238 flow. Second operand 36 states and 2781 transitions. [2023-11-06 22:13:32,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 976 transitions, 24683 flow [2023-11-06 22:13:33,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 976 transitions, 24420 flow, removed 90 selfloop flow, removed 10 redundant places. [2023-11-06 22:13:33,795 INFO L231 Difference]: Finished difference. Result has 369 places, 900 transitions, 24134 flow [2023-11-06 22:13:33,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=17999, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24134, PETRI_PLACES=369, PETRI_TRANSITIONS=900} [2023-11-06 22:13:33,796 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 340 predicate places. [2023-11-06 22:13:33,796 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 900 transitions, 24134 flow [2023-11-06 22:13:33,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.1304347826087) internal successors, (1728), 23 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:33,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:33,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:33,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:33,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:13:33,997 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:13:33,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:33,997 INFO L85 PathProgramCache]: Analyzing trace with hash -176267031, now seen corresponding path program 19 times [2023-11-06 22:13:33,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:33,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240575067] [2023-11-06 22:13:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:33,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:34,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:34,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240575067] [2023-11-06 22:13:34,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240575067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:34,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088743013] [2023-11-06 22:13:34,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:13:34,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:34,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:34,185 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:34,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:13:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:34,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:13:34,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:34,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:34,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088743013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:34,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:34,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:13:34,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745644836] [2023-11-06 22:13:34,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:34,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:13:34,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:13:34,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:13:34,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:34,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 900 transitions, 24134 flow. Second operand has 24 states, 24 states have (on average 74.95833333333333) internal successors, (1799), 24 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:34,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:34,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:34,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:38,371 INFO L124 PetriNetUnfolderBase]: 2807/4886 cut-off events. [2023-11-06 22:13:38,371 INFO L125 PetriNetUnfolderBase]: For 108809/108809 co-relation queries the response was YES. [2023-11-06 22:13:38,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54636 conditions, 4886 events. 2807/4886 cut-off events. For 108809/108809 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32499 event pairs, 29 based on Foata normal form. 36/4922 useless extension candidates. Maximal degree in co-relation 54538. Up to 1253 conditions per place. [2023-11-06 22:13:38,450 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 431 selfloop transitions, 872 changer transitions 14/1317 dead transitions. [2023-11-06 22:13:38,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1317 transitions, 36317 flow [2023-11-06 22:13:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 22:13:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-06 22:13:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3320 transitions. [2023-11-06 22:13:38,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415103775943986 [2023-11-06 22:13:38,456 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3320 transitions. [2023-11-06 22:13:38,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3320 transitions. [2023-11-06 22:13:38,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:38,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3320 transitions. [2023-11-06 22:13:38,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 77.20930232558139) internal successors, (3320), 43 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:38,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 186.0) internal successors, (8184), 44 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:38,471 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 186.0) internal successors, (8184), 44 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:38,471 INFO L175 Difference]: Start difference. First operand has 369 places, 900 transitions, 24134 flow. Second operand 43 states and 3320 transitions. [2023-11-06 22:13:38,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1317 transitions, 36317 flow [2023-11-06 22:13:39,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1317 transitions, 35536 flow, removed 267 selfloop flow, removed 16 redundant places. [2023-11-06 22:13:39,953 INFO L231 Difference]: Finished difference. Result has 407 places, 1226 transitions, 35141 flow [2023-11-06 22:13:39,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=23479, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=35141, PETRI_PLACES=407, PETRI_TRANSITIONS=1226} [2023-11-06 22:13:39,955 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 378 predicate places. [2023-11-06 22:13:39,955 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1226 transitions, 35141 flow [2023-11-06 22:13:39,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 74.95833333333333) internal successors, (1799), 24 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:39,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:39,955 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:39,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:40,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:13:40,156 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:13:40,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1235911637, now seen corresponding path program 20 times [2023-11-06 22:13:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:40,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353854455] [2023-11-06 22:13:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:40,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:40,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:40,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353854455] [2023-11-06 22:13:40,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353854455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:40,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850385327] [2023-11-06 22:13:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:13:40,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:40,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:40,336 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:40,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:13:40,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:13:40,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:40,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:13:40,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:40,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:13:40,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850385327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:40,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:40,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-06 22:13:40,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428836409] [2023-11-06 22:13:40,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:40,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:13:40,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:13:40,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:13:40,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:40,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1226 transitions, 35141 flow. Second operand has 23 states, 23 states have (on average 75.1304347826087) internal successors, (1728), 23 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:40,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:40,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:40,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:44,481 INFO L124 PetriNetUnfolderBase]: 2888/5053 cut-off events. [2023-11-06 22:13:44,481 INFO L125 PetriNetUnfolderBase]: For 132576/132576 co-relation queries the response was YES. [2023-11-06 22:13:44,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60005 conditions, 5053 events. 2888/5053 cut-off events. For 132576/132576 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34092 event pairs, 109 based on Foata normal form. 58/5111 useless extension candidates. Maximal degree in co-relation 59896. Up to 4468 conditions per place. [2023-11-06 22:13:44,557 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 1175 selfloop transitions, 145 changer transitions 19/1339 dead transitions. [2023-11-06 22:13:44,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1339 transitions, 39756 flow [2023-11-06 22:13:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:13:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:13:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2250 transitions. [2023-11-06 22:13:44,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41713014460511677 [2023-11-06 22:13:44,562 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2250 transitions. [2023-11-06 22:13:44,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2250 transitions. [2023-11-06 22:13:44,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:44,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2250 transitions. [2023-11-06 22:13:44,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 77.58620689655173) internal successors, (2250), 29 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,573 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,573 INFO L175 Difference]: Start difference. First operand has 407 places, 1226 transitions, 35141 flow. Second operand 29 states and 2250 transitions. [2023-11-06 22:13:44,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1339 transitions, 39756 flow [2023-11-06 22:13:46,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1339 transitions, 39215 flow, removed 183 selfloop flow, removed 18 redundant places. [2023-11-06 22:13:46,847 INFO L231 Difference]: Finished difference. Result has 426 places, 1258 transitions, 36094 flow [2023-11-06 22:13:46,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=34449, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=36094, PETRI_PLACES=426, PETRI_TRANSITIONS=1258} [2023-11-06 22:13:46,849 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 397 predicate places. [2023-11-06 22:13:46,849 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1258 transitions, 36094 flow [2023-11-06 22:13:46,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.1304347826087) internal successors, (1728), 23 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:46,850 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:46,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:47,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:13:47,055 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:13:47,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1016845931, now seen corresponding path program 21 times [2023-11-06 22:13:47,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:47,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676991948] [2023-11-06 22:13:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:47,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:47,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676991948] [2023-11-06 22:13:47,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676991948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:47,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130682121] [2023-11-06 22:13:47,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:13:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:47,227 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:47,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:13:47,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:13:47,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:47,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:13:47,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:47,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:47,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130682121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:47,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:47,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-06 22:13:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160383903] [2023-11-06 22:13:47,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:47,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:13:47,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:13:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:13:47,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:13:47,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1258 transitions, 36094 flow. Second operand has 22 states, 22 states have (on average 74.9090909090909) internal successors, (1648), 22 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:47,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:13:47,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:51,431 INFO L124 PetriNetUnfolderBase]: 2928/5079 cut-off events. [2023-11-06 22:13:51,432 INFO L125 PetriNetUnfolderBase]: For 133158/133158 co-relation queries the response was YES. [2023-11-06 22:13:51,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60753 conditions, 5079 events. 2928/5079 cut-off events. For 133158/133158 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33940 event pairs, 109 based on Foata normal form. 28/5107 useless extension candidates. Maximal degree in co-relation 60634. Up to 4572 conditions per place. [2023-11-06 22:13:51,541 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 1148 selfloop transitions, 182 changer transitions 4/1334 dead transitions. [2023-11-06 22:13:51,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1334 transitions, 40410 flow [2023-11-06 22:13:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:13:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:13:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1851 transitions. [2023-11-06 22:13:51,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146505376344086 [2023-11-06 22:13:51,546 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1851 transitions. [2023-11-06 22:13:51,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1851 transitions. [2023-11-06 22:13:51,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:51,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1851 transitions. [2023-11-06 22:13:51,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 77.125) internal successors, (1851), 24 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:51,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 186.0) internal successors, (4650), 25 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:51,558 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 186.0) internal successors, (4650), 25 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:51,558 INFO L175 Difference]: Start difference. First operand has 426 places, 1258 transitions, 36094 flow. Second operand 24 states and 1851 transitions. [2023-11-06 22:13:51,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1334 transitions, 40410 flow [2023-11-06 22:13:54,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1334 transitions, 40073 flow, removed 132 selfloop flow, removed 13 redundant places. [2023-11-06 22:13:54,193 INFO L231 Difference]: Finished difference. Result has 444 places, 1297 transitions, 37644 flow [2023-11-06 22:13:54,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=35647, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1079, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=37644, PETRI_PLACES=444, PETRI_TRANSITIONS=1297} [2023-11-06 22:13:54,195 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 415 predicate places. [2023-11-06 22:13:54,195 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1297 transitions, 37644 flow [2023-11-06 22:13:54,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 74.9090909090909) internal successors, (1648), 22 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:54,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:54,196 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:54,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:54,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:13:54,402 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:13:54,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:54,402 INFO L85 PathProgramCache]: Analyzing trace with hash 782326343, now seen corresponding path program 22 times [2023-11-06 22:13:54,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:54,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442603981] [2023-11-06 22:13:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:54,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:54,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:54,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442603981] [2023-11-06 22:13:54,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442603981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:54,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70282135] [2023-11-06 22:13:54,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:13:54,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:54,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:54,545 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:54,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:13:54,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:13:54,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:54,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:13:54,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:54,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:54,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70282135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:54,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:54,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 10 [2023-11-06 22:13:54,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838013819] [2023-11-06 22:13:54,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:54,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:13:54,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:54,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:13:54,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:13:54,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 186 [2023-11-06 22:13:54,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1297 transitions, 37644 flow. Second operand has 12 states, 12 states have (on average 81.0) internal successors, (972), 12 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:54,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:54,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 186 [2023-11-06 22:13:54,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:00,044 INFO L124 PetriNetUnfolderBase]: 3925/6775 cut-off events. [2023-11-06 22:14:00,044 INFO L125 PetriNetUnfolderBase]: For 179108/179108 co-relation queries the response was YES. [2023-11-06 22:14:00,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82343 conditions, 6775 events. 3925/6775 cut-off events. For 179108/179108 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 47553 event pairs, 114 based on Foata normal form. 1/6773 useless extension candidates. Maximal degree in co-relation 82216. Up to 3847 conditions per place. [2023-11-06 22:14:00,221 INFO L140 encePairwiseOnDemand]: 182/186 looper letters, 1156 selfloop transitions, 544 changer transitions 92/1795 dead transitions. [2023-11-06 22:14:00,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1795 transitions, 55010 flow [2023-11-06 22:14:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:14:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:14:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 611 transitions. [2023-11-06 22:14:00,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46927803379416283 [2023-11-06 22:14:00,223 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 611 transitions. [2023-11-06 22:14:00,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 611 transitions. [2023-11-06 22:14:00,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:00,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 611 transitions. [2023-11-06 22:14:00,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.28571428571429) internal successors, (611), 7 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,227 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,227 INFO L175 Difference]: Start difference. First operand has 444 places, 1297 transitions, 37644 flow. Second operand 7 states and 611 transitions. [2023-11-06 22:14:00,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1795 transitions, 55010 flow [2023-11-06 22:14:04,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 1795 transitions, 54409 flow, removed 234 selfloop flow, removed 11 redundant places. [2023-11-06 22:14:04,238 INFO L231 Difference]: Finished difference. Result has 442 places, 1544 transitions, 46484 flow [2023-11-06 22:14:04,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=37271, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=46484, PETRI_PLACES=442, PETRI_TRANSITIONS=1544} [2023-11-06 22:14:04,240 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 413 predicate places. [2023-11-06 22:14:04,240 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1544 transitions, 46484 flow [2023-11-06 22:14:04,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.0) internal successors, (972), 12 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:04,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:04,241 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:04,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:04,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:14:04,443 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:14:04,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:04,443 INFO L85 PathProgramCache]: Analyzing trace with hash 599791271, now seen corresponding path program 23 times [2023-11-06 22:14:04,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:04,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369110032] [2023-11-06 22:14:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:04,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:04,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:04,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369110032] [2023-11-06 22:14:04,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369110032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:04,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445414159] [2023-11-06 22:14:04,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:14:04,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:04,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:04,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:04,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:14:04,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-06 22:14:04,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:04,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:14:04,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:14:04,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:14:05,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445414159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:05,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:05,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 18 [2023-11-06 22:14:05,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631921964] [2023-11-06 22:14:05,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:05,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:14:05,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:14:05,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:14:05,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:14:05,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1544 transitions, 46484 flow. Second operand has 19 states, 19 states have (on average 75.26315789473684) internal successors, (1430), 19 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:05,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:14:05,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:10,857 INFO L124 PetriNetUnfolderBase]: 4113/7237 cut-off events. [2023-11-06 22:14:10,858 INFO L125 PetriNetUnfolderBase]: For 229888/229888 co-relation queries the response was YES. [2023-11-06 22:14:11,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92036 conditions, 7237 events. 4113/7237 cut-off events. For 229888/229888 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 52603 event pairs, 107 based on Foata normal form. 76/7313 useless extension candidates. Maximal degree in co-relation 91906. Up to 5027 conditions per place. [2023-11-06 22:14:11,085 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 1288 selfloop transitions, 510 changer transitions 45/1843 dead transitions. [2023-11-06 22:14:11,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1843 transitions, 57629 flow [2023-11-06 22:14:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:14:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:14:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2666 transitions. [2023-11-06 22:14:11,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2023-11-06 22:14:11,090 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2666 transitions. [2023-11-06 22:14:11,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2666 transitions. [2023-11-06 22:14:11,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:11,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2666 transitions. [2023-11-06 22:14:11,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 78.41176470588235) internal successors, (2666), 34 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) [2023-11-06 22:14:11,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 186.0) internal successors, (6510), 35 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:11,102 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 186.0) internal successors, (6510), 35 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:11,103 INFO L175 Difference]: Start difference. First operand has 442 places, 1544 transitions, 46484 flow. Second operand 34 states and 2666 transitions. [2023-11-06 22:14:11,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1843 transitions, 57629 flow [2023-11-06 22:14:15,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 1843 transitions, 57292 flow, removed 147 selfloop flow, removed 3 redundant places. [2023-11-06 22:14:15,327 INFO L231 Difference]: Finished difference. Result has 484 places, 1684 transitions, 52520 flow [2023-11-06 22:14:15,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=46250, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=52520, PETRI_PLACES=484, PETRI_TRANSITIONS=1684} [2023-11-06 22:14:15,329 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 455 predicate places. [2023-11-06 22:14:15,329 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1684 transitions, 52520 flow [2023-11-06 22:14:15,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.26315789473684) internal successors, (1430), 19 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:15,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:15,330 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:15,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:15,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:15,535 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:14:15,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:15,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1133092783, now seen corresponding path program 24 times [2023-11-06 22:14:15,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:15,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893632574] [2023-11-06 22:14:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:15,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:15,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:15,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893632574] [2023-11-06 22:14:15,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893632574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:15,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111813838] [2023-11-06 22:14:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:14:15,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:15,729 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:15,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:14:15,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-06 22:14:15,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:15,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:14:15,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:15,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:16,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111813838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:16,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:16,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-06 22:14:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119292886] [2023-11-06 22:14:16,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:16,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:14:16,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:14:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:14:16,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:14:16,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1684 transitions, 52520 flow. Second operand has 24 states, 24 states have (on average 74.58333333333333) internal successors, (1790), 24 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:16,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:16,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:14:16,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:24,754 INFO L124 PetriNetUnfolderBase]: 4636/8150 cut-off events. [2023-11-06 22:14:24,754 INFO L125 PetriNetUnfolderBase]: For 302628/302628 co-relation queries the response was YES. [2023-11-06 22:14:24,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107353 conditions, 8150 events. 4636/8150 cut-off events. For 302628/302628 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 59962 event pairs, 155 based on Foata normal form. 160/8310 useless extension candidates. Maximal degree in co-relation 107213. Up to 6499 conditions per place. [2023-11-06 22:14:24,923 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 1531 selfloop transitions, 430 changer transitions 22/1983 dead transitions. [2023-11-06 22:14:24,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1983 transitions, 65797 flow [2023-11-06 22:14:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:14:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:14:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2099 transitions. [2023-11-06 22:14:24,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179609717244126 [2023-11-06 22:14:24,926 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2099 transitions. [2023-11-06 22:14:24,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2099 transitions. [2023-11-06 22:14:24,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:24,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2099 transitions. [2023-11-06 22:14:24,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 77.74074074074075) internal successors, (2099), 27 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:24,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 186.0) internal successors, (5208), 28 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:24,933 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 186.0) internal successors, (5208), 28 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:24,933 INFO L175 Difference]: Start difference. First operand has 484 places, 1684 transitions, 52520 flow. Second operand 27 states and 2099 transitions. [2023-11-06 22:14:24,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1983 transitions, 65797 flow [2023-11-06 22:14:30,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1983 transitions, 63342 flow, removed 590 selfloop flow, removed 14 redundant places. [2023-11-06 22:14:30,086 INFO L231 Difference]: Finished difference. Result has 506 places, 1899 transitions, 59785 flow [2023-11-06 22:14:30,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=50362, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=59785, PETRI_PLACES=506, PETRI_TRANSITIONS=1899} [2023-11-06 22:14:30,087 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 477 predicate places. [2023-11-06 22:14:30,087 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1899 transitions, 59785 flow [2023-11-06 22:14:30,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 74.58333333333333) internal successors, (1790), 24 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:30,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:30,088 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:30,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:30,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:30,289 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:14:30,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:30,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1635271712, now seen corresponding path program 25 times [2023-11-06 22:14:30,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:30,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613737215] [2023-11-06 22:14:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:30,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:30,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:30,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613737215] [2023-11-06 22:14:30,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613737215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:30,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315059799] [2023-11-06 22:14:30,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:14:30,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:30,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:30,557 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:30,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:14:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:30,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:14:30,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:30,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:31,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315059799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:31,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:31,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-11-06 22:14:31,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160270189] [2023-11-06 22:14:31,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:31,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:14:31,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:31,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:14:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:14:31,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:14:31,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1899 transitions, 59785 flow. Second operand has 26 states, 26 states have (on average 74.96153846153847) internal successors, (1949), 26 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:31,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:31,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:14:31,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:41,437 INFO L124 PetriNetUnfolderBase]: 5662/9961 cut-off events. [2023-11-06 22:14:41,437 INFO L125 PetriNetUnfolderBase]: For 340643/340643 co-relation queries the response was YES. [2023-11-06 22:14:41,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129575 conditions, 9961 events. 5662/9961 cut-off events. For 340643/340643 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 75472 event pairs, 68 based on Foata normal form. 30/9991 useless extension candidates. Maximal degree in co-relation 129425. Up to 3457 conditions per place. [2023-11-06 22:14:41,656 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 470 selfloop transitions, 2164 changer transitions 40/2674 dead transitions. [2023-11-06 22:14:41,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 2674 transitions, 87278 flow [2023-11-06 22:14:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:14:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 22:14:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3568 transitions. [2023-11-06 22:14:41,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170172978027116 [2023-11-06 22:14:41,662 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3568 transitions. [2023-11-06 22:14:41,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3568 transitions. [2023-11-06 22:14:41,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:41,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3568 transitions. [2023-11-06 22:14:41,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 77.56521739130434) internal successors, (3568), 46 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:41,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 186.0) internal successors, (8742), 47 states have internal predecessors, (8742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:41,683 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 186.0) internal successors, (8742), 47 states have internal predecessors, (8742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:41,683 INFO L175 Difference]: Start difference. First operand has 506 places, 1899 transitions, 59785 flow. Second operand 46 states and 3568 transitions. [2023-11-06 22:14:41,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 2674 transitions, 87278 flow [2023-11-06 22:14:48,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 2674 transitions, 86252 flow, removed 477 selfloop flow, removed 11 redundant places. [2023-11-06 22:14:48,842 INFO L231 Difference]: Finished difference. Result has 551 places, 2481 transitions, 84297 flow [2023-11-06 22:14:48,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=58907, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=84297, PETRI_PLACES=551, PETRI_TRANSITIONS=2481} [2023-11-06 22:14:48,844 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 522 predicate places. [2023-11-06 22:14:48,845 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 2481 transitions, 84297 flow [2023-11-06 22:14:48,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.96153846153847) internal successors, (1949), 26 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:48,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:48,845 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:48,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:49,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:49,051 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:14:49,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1855548594, now seen corresponding path program 26 times [2023-11-06 22:14:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:49,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425045625] [2023-11-06 22:14:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:49,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425045625] [2023-11-06 22:14:49,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425045625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962050746] [2023-11-06 22:14:49,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:14:49,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:49,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:49,281 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:49,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:14:49,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:14:49,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:49,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:14:49,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:49,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:49,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962050746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:49,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:49,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-11-06 22:14:49,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885538997] [2023-11-06 22:14:49,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:49,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:14:49,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:49,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:14:49,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:14:50,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:14:50,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 2481 transitions, 84297 flow. Second operand has 27 states, 27 states have (on average 74.92592592592592) internal successors, (2023), 27 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:50,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:50,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:14:50,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:04,879 INFO L124 PetriNetUnfolderBase]: 6443/11207 cut-off events. [2023-11-06 22:15:04,879 INFO L125 PetriNetUnfolderBase]: For 414391/414391 co-relation queries the response was YES. [2023-11-06 22:15:05,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154107 conditions, 11207 events. 6443/11207 cut-off events. For 414391/414391 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 85179 event pairs, 63 based on Foata normal form. 108/11315 useless extension candidates. Maximal degree in co-relation 153947. Up to 2973 conditions per place. [2023-11-06 22:15:05,223 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 447 selfloop transitions, 2538 changer transitions 25/3010 dead transitions. [2023-11-06 22:15:05,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 3010 transitions, 105383 flow [2023-11-06 22:15:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-06 22:15:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-06 22:15:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4260 transitions. [2023-11-06 22:15:05,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2023-11-06 22:15:05,231 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4260 transitions. [2023-11-06 22:15:05,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4260 transitions. [2023-11-06 22:15:05,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:05,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4260 transitions. [2023-11-06 22:15:05,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 77.45454545454545) internal successors, (4260), 55 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 186.0) internal successors, (10416), 56 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,253 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 186.0) internal successors, (10416), 56 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,253 INFO L175 Difference]: Start difference. First operand has 551 places, 2481 transitions, 84297 flow. Second operand 55 states and 4260 transitions. [2023-11-06 22:15:05,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 3010 transitions, 105383 flow [2023-11-06 22:15:16,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 3010 transitions, 103372 flow, removed 952 selfloop flow, removed 12 redundant places. [2023-11-06 22:15:16,477 INFO L231 Difference]: Finished difference. Result has 610 places, 2852 transitions, 102258 flow [2023-11-06 22:15:16,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=82870, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=102258, PETRI_PLACES=610, PETRI_TRANSITIONS=2852} [2023-11-06 22:15:16,480 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 581 predicate places. [2023-11-06 22:15:16,480 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 2852 transitions, 102258 flow [2023-11-06 22:15:16,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.92592592592592) internal successors, (2023), 27 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:16,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:16,480 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:16,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:16,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 22:15:16,681 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:15:16,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1035409072, now seen corresponding path program 27 times [2023-11-06 22:15:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:16,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156160580] [2023-11-06 22:15:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:16,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:16,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:16,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156160580] [2023-11-06 22:15:16,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156160580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:16,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37230680] [2023-11-06 22:15:16,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:15:16,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:16,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:16,952 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:16,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c8003ae-d038-4e74-857f-b59e87616fb0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:15:17,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:15:17,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:17,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:15:17,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:17,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:17,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37230680] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:17,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:17,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-11-06 22:15:17,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780867417] [2023-11-06 22:15:17,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:17,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:15:17,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:17,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:15:17,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:15:17,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 186 [2023-11-06 22:15:17,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 2852 transitions, 102258 flow. Second operand has 27 states, 27 states have (on average 74.74074074074075) internal successors, (2018), 27 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:17,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:17,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 186 [2023-11-06 22:15:17,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:40,137 INFO L124 PetriNetUnfolderBase]: 7257/12687 cut-off events. [2023-11-06 22:15:40,137 INFO L125 PetriNetUnfolderBase]: For 557502/557502 co-relation queries the response was YES. [2023-11-06 22:15:40,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182837 conditions, 12687 events. 7257/12687 cut-off events. For 557502/557502 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 99252 event pairs, 81 based on Foata normal form. 80/12767 useless extension candidates. Maximal degree in co-relation 182659. Up to 4370 conditions per place. [2023-11-06 22:15:40,497 INFO L140 encePairwiseOnDemand]: 178/186 looper letters, 495 selfloop transitions, 2906 changer transitions 6/3407 dead transitions. [2023-11-06 22:15:40,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 3407 transitions, 124959 flow [2023-11-06 22:15:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-11-06 22:15:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-11-06 22:15:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 7295 transitions. [2023-11-06 22:15:40,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128466327108093 [2023-11-06 22:15:40,510 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 7295 transitions. [2023-11-06 22:15:40,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 7295 transitions. [2023-11-06 22:15:40,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:40,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 7295 transitions. [2023-11-06 22:15:40,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 76.78947368421052) internal successors, (7295), 95 states have internal predecessors, (7295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:40,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 186.0) internal successors, (17856), 96 states have internal predecessors, (17856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:40,551 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 186.0) internal successors, (17856), 96 states have internal predecessors, (17856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:40,552 INFO L175 Difference]: Start difference. First operand has 610 places, 2852 transitions, 102258 flow. Second operand 95 states and 7295 transitions. [2023-11-06 22:15:40,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 3407 transitions, 124959 flow