./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:58:33,271 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:58:33,342 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:58:33,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:58:33,349 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:58:33,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:58:33,394 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:58:33,394 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:58:33,395 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:58:33,396 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:58:33,396 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:58:33,397 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:58:33,398 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:58:33,398 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:58:33,399 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:58:33,399 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:58:33,400 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:58:33,401 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:58:33,401 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:58:33,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:58:33,402 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:58:33,403 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:58:33,404 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:58:33,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:58:33,405 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:58:33,405 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:58:33,406 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:58:33,406 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:58:33,407 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:58:33,416 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:58:33,417 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:58:33,417 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:58:33,418 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:33,418 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:58:33,418 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:58:33,418 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:58:33,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:58:33,419 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:58:33,419 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:58:33,419 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:58:33,420 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:58:33,420 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_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 [2023-11-24 21:58:33,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:58:33,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:58:33,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:58:33,770 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:58:33,770 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:58:33,771 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-24 21:58:36,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:58:37,087 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:58:37,087 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-24 21:58:37,104 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/data/36d40b8f5/3913c966f36745aeb4fc4ae153a288e4/FLAG3aa0f787b [2023-11-24 21:58:37,119 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/data/36d40b8f5/3913c966f36745aeb4fc4ae153a288e4 [2023-11-24 21:58:37,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:58:37,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:58:37,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:37,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:58:37,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:58:37,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0907ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37, skipping insertion in model container [2023-11-24 21:58:37,136 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:58:37,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:37,393 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:58:37,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:37,425 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:58:37,425 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:58:37,438 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:58:37,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37 WrapperNode [2023-11-24 21:58:37,439 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:37,440 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:37,441 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:58:37,441 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:58:37,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,457 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,480 INFO L138 Inliner]: procedures = 21, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2023-11-24 21:58:37,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:37,483 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:58:37,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:58:37,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:58:37,493 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,496 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,513 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-24 21:58:37,513 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,513 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,520 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,531 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:58:37,532 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:58:37,532 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:58:37,532 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:58:37,533 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:37,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:37,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:58:37,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:58:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:58:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:58:37,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:58:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:58:37,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:58:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:58:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:58:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:58:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:58:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:58:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:58:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:58:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:58:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:58:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:58:37,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:58:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:58:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:58:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:58:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:58:37,613 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:58:37,804 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:58:37,807 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:58:38,082 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:58:38,242 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:58:38,242 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:58:38,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:38 BoogieIcfgContainer [2023-11-24 21:58:38,243 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:58:38,245 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:58:38,245 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:58:38,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:58:38,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:58:37" (1/3) ... [2023-11-24 21:58:38,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198127fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:38, skipping insertion in model container [2023-11-24 21:58:38,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37" (2/3) ... [2023-11-24 21:58:38,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198127fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:38, skipping insertion in model container [2023-11-24 21:58:38,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:38" (3/3) ... [2023-11-24 21:58:38,260 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-11-24 21:58:38,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:58:38,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-24 21:58:38,280 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:58:38,331 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:58:38,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 88 flow [2023-11-24 21:58:38,403 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-11-24 21:58:38,404 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:58:38,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 2/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 58 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-24 21:58:38,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 88 flow [2023-11-24 21:58:38,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 80 flow [2023-11-24 21:58:38,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:58:38,442 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;@124cd4cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:58:38,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-24 21:58:38,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:58:38,453 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:58:38,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:58:38,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:38,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:58:38,455 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)] === [2023-11-24 21:58:38,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash 8762, now seen corresponding path program 1 times [2023-11-24 21:58:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802479182] [2023-11-24 21:58:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:38,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:38,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:38,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802479182] [2023-11-24 21:58:38,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802479182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:38,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:38,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753934920] [2023-11-24 21:58:38,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:38,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:38,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:38,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-24 21:58:38,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:38,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:38,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-24 21:58:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:39,062 INFO L124 PetriNetUnfolderBase]: 71/160 cut-off events. [2023-11-24 21:58:39,062 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-24 21:58:39,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 160 events. 71/160 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 521 event pairs, 47 based on Foata normal form. 1/145 useless extension candidates. Maximal degree in co-relation 243. Up to 121 conditions per place. [2023-11-24 21:58:39,067 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 16 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-11-24 21:58:39,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 106 flow [2023-11-24 21:58:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-24 21:58:39,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2023-11-24 21:58:39,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-24 21:58:39,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-24 21:58:39,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:39,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-24 21:58:39,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,093 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 80 flow. Second operand 3 states and 68 transitions. [2023-11-24 21:58:39,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 106 flow [2023-11-24 21:58:39,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:58:39,100 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 66 flow [2023-11-24 21:58:39,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-24 21:58:39,106 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -6 predicate places. [2023-11-24 21:58:39,106 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 66 flow [2023-11-24 21:58:39,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:39,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:58:39,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:58:39,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:58:39,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash 8763, now seen corresponding path program 1 times [2023-11-24 21:58:39,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:39,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660904479] [2023-11-24 21:58:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:39,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:39,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660904479] [2023-11-24 21:58:39,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660904479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:39,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:39,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:39,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271496590] [2023-11-24 21:58:39,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:39,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:39,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:39,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:39,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:39,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:39,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:39,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:39,413 INFO L124 PetriNetUnfolderBase]: 47/119 cut-off events. [2023-11-24 21:58:39,414 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2023-11-24 21:58:39,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 119 events. 47/119 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 360 event pairs, 30 based on Foata normal form. 13/117 useless extension candidates. Maximal degree in co-relation 205. Up to 84 conditions per place. [2023-11-24 21:58:39,417 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 14 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-24 21:58:39,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 92 flow [2023-11-24 21:58:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:39,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-24 21:58:39,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2023-11-24 21:58:39,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-24 21:58:39,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-24 21:58:39,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:39,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-24 21:58:39,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,423 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 66 flow. Second operand 3 states and 71 transitions. [2023-11-24 21:58:39,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 92 flow [2023-11-24 21:58:39,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 28 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:58:39,425 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 63 flow [2023-11-24 21:58:39,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-24 21:58:39,426 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-11-24 21:58:39,427 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 63 flow [2023-11-24 21:58:39,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:39,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:58:39,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:58:39,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:58:39,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:39,428 INFO L85 PathProgramCache]: Analyzing trace with hash 261261817, now seen corresponding path program 1 times [2023-11-24 21:58:39,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:39,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049702285] [2023-11-24 21:58:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:39,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:39,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:39,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049702285] [2023-11-24 21:58:39,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049702285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:39,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:39,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:39,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561814576] [2023-11-24 21:58:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:39,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-24 21:58:39,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:39,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-24 21:58:39,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:39,644 INFO L124 PetriNetUnfolderBase]: 54/123 cut-off events. [2023-11-24 21:58:39,644 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:58:39,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 123 events. 54/123 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 349 event pairs, 35 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 223. Up to 98 conditions per place. [2023-11-24 21:58:39,646 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 16 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-24 21:58:39,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 93 flow [2023-11-24 21:58:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-24 21:58:39,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2023-11-24 21:58:39,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-24 21:58:39,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-24 21:58:39,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:39,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-24 21:58:39,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,656 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 63 flow. Second operand 3 states and 67 transitions. [2023-11-24 21:58:39,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 93 flow [2023-11-24 21:58:39,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:58:39,661 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 60 flow [2023-11-24 21:58:39,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-24 21:58:39,664 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-11-24 21:58:39,664 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 60 flow [2023-11-24 21:58:39,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:39,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:58:39,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:58:39,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:58:39,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:39,667 INFO L85 PathProgramCache]: Analyzing trace with hash 261261818, now seen corresponding path program 1 times [2023-11-24 21:58:39,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:39,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726635689] [2023-11-24 21:58:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:39,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:39,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726635689] [2023-11-24 21:58:39,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726635689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:39,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:39,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:39,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561439229] [2023-11-24 21:58:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:39,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:39,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:39,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:39,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:39,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:39,852 INFO L124 PetriNetUnfolderBase]: 47/111 cut-off events. [2023-11-24 21:58:39,853 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2023-11-24 21:58:39,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 111 events. 47/111 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 318 event pairs, 30 based on Foata normal form. 6/110 useless extension candidates. Maximal degree in co-relation 197. Up to 84 conditions per place. [2023-11-24 21:58:39,855 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 14 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-24 21:58:39,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 86 flow [2023-11-24 21:58:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-24 21:58:39,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2023-11-24 21:58:39,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-24 21:58:39,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-24 21:58:39,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:39,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-24 21:58:39,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,860 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 60 flow. Second operand 3 states and 71 transitions. [2023-11-24 21:58:39,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 86 flow [2023-11-24 21:58:39,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 85 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:58:39,862 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 57 flow [2023-11-24 21:58:39,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-11-24 21:58:39,863 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-11-24 21:58:39,863 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 57 flow [2023-11-24 21:58:39,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:39,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:39,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:39,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:58:39,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:58:39,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:39,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1475639376, now seen corresponding path program 1 times [2023-11-24 21:58:39,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:39,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340302035] [2023-11-24 21:58:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:39,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:40,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:40,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340302035] [2023-11-24 21:58:40,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340302035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:40,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:40,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714882552] [2023-11-24 21:58:40,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:40,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:40,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:40,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:40,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:40,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-24 21:58:40,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:40,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-24 21:58:40,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:40,126 INFO L124 PetriNetUnfolderBase]: 76/176 cut-off events. [2023-11-24 21:58:40,126 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-24 21:58:40,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 176 events. 76/176 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 609 event pairs, 27 based on Foata normal form. 5/179 useless extension candidates. Maximal degree in co-relation 322. Up to 91 conditions per place. [2023-11-24 21:58:40,129 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 20 selfloop transitions, 2 changer transitions 3/33 dead transitions. [2023-11-24 21:58:40,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 128 flow [2023-11-24 21:58:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-24 21:58:40,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2023-11-24 21:58:40,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-24 21:58:40,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-24 21:58:40,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:40,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-24 21:58:40,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,133 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 57 flow. Second operand 3 states and 84 transitions. [2023-11-24 21:58:40,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 128 flow [2023-11-24 21:58:40,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:58:40,135 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 70 flow [2023-11-24 21:58:40,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-11-24 21:58:40,136 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-11-24 21:58:40,136 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 70 flow [2023-11-24 21:58:40,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:40,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:40,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:58:40,137 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)] === [2023-11-24 21:58:40,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash -755346367, now seen corresponding path program 1 times [2023-11-24 21:58:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:40,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804359892] [2023-11-24 21:58:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:40,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:40,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:40,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804359892] [2023-11-24 21:58:40,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804359892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:40,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:40,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:58:40,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182275440] [2023-11-24 21:58:40,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:40,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:40,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:40,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:40,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:40,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:40,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:40,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:40,482 INFO L124 PetriNetUnfolderBase]: 137/287 cut-off events. [2023-11-24 21:58:40,482 INFO L125 PetriNetUnfolderBase]: For 15/17 co-relation queries the response was YES. [2023-11-24 21:58:40,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 287 events. 137/287 cut-off events. For 15/17 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1193 event pairs, 60 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 583. Up to 168 conditions per place. [2023-11-24 21:58:40,486 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 29 selfloop transitions, 9 changer transitions 2/48 dead transitions. [2023-11-24 21:58:40,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 201 flow [2023-11-24 21:58:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:58:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2023-11-24 21:58:40,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7135135135135136 [2023-11-24 21:58:40,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 132 transitions. [2023-11-24 21:58:40,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 132 transitions. [2023-11-24 21:58:40,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:40,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 132 transitions. [2023-11-24 21:58:40,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,491 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,492 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 70 flow. Second operand 5 states and 132 transitions. [2023-11-24 21:58:40,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 201 flow [2023-11-24 21:58:40,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:58:40,494 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 136 flow [2023-11-24 21:58:40,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-24 21:58:40,495 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-11-24 21:58:40,496 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 136 flow [2023-11-24 21:58:40,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:40,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:40,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:58:40,497 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)] === [2023-11-24 21:58:40,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash 248364379, now seen corresponding path program 2 times [2023-11-24 21:58:40,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:40,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492017717] [2023-11-24 21:58:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:40,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:40,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:40,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492017717] [2023-11-24 21:58:40,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492017717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:40,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:40,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:58:40,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448298119] [2023-11-24 21:58:40,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:40,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:58:40,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:40,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:58:40,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:58:40,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:40,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:40,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:40,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:40,908 INFO L124 PetriNetUnfolderBase]: 156/307 cut-off events. [2023-11-24 21:58:40,909 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2023-11-24 21:58:40,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 307 events. 156/307 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1248 event pairs, 4 based on Foata normal form. 9/314 useless extension candidates. Maximal degree in co-relation 895. Up to 122 conditions per place. [2023-11-24 21:58:40,914 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 45 selfloop transitions, 15 changer transitions 0/68 dead transitions. [2023-11-24 21:58:40,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 394 flow [2023-11-24 21:58:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:58:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:58:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2023-11-24 21:58:40,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7027027027027027 [2023-11-24 21:58:40,917 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 182 transitions. [2023-11-24 21:58:40,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 182 transitions. [2023-11-24 21:58:40,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:40,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 182 transitions. [2023-11-24 21:58:40,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,926 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,926 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 136 flow. Second operand 7 states and 182 transitions. [2023-11-24 21:58:40,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 394 flow [2023-11-24 21:58:40,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 68 transitions, 392 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-24 21:58:40,933 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 262 flow [2023-11-24 21:58:40,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-24 21:58:40,936 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2023-11-24 21:58:40,937 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 262 flow [2023-11-24 21:58:40,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:40,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:40,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:40,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:58:40,939 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)] === [2023-11-24 21:58:40,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1663651481, now seen corresponding path program 3 times [2023-11-24 21:58:40,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:40,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381930528] [2023-11-24 21:58:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:40,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:41,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:41,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381930528] [2023-11-24 21:58:41,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381930528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:41,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:41,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:58:41,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822016810] [2023-11-24 21:58:41,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:41,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:41,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:41,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:41,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:41,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:41,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:41,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:41,245 INFO L124 PetriNetUnfolderBase]: 208/404 cut-off events. [2023-11-24 21:58:41,246 INFO L125 PetriNetUnfolderBase]: For 717/721 co-relation queries the response was YES. [2023-11-24 21:58:41,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 404 events. 208/404 cut-off events. For 717/721 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1646 event pairs, 72 based on Foata normal form. 7/406 useless extension candidates. Maximal degree in co-relation 1467. Up to 169 conditions per place. [2023-11-24 21:58:41,252 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 44 selfloop transitions, 9 changer transitions 3/64 dead transitions. [2023-11-24 21:58:41,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 491 flow [2023-11-24 21:58:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:41,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:58:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2023-11-24 21:58:41,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6864864864864865 [2023-11-24 21:58:41,254 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 127 transitions. [2023-11-24 21:58:41,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 127 transitions. [2023-11-24 21:58:41,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:41,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 127 transitions. [2023-11-24 21:58:41,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:41,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:41,256 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:41,257 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 262 flow. Second operand 5 states and 127 transitions. [2023-11-24 21:58:41,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 491 flow [2023-11-24 21:58:41,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 491 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:58:41,263 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 308 flow [2023-11-24 21:58:41,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2023-11-24 21:58:41,265 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 18 predicate places. [2023-11-24 21:58:41,265 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 308 flow [2023-11-24 21:58:41,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:41,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:41,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:41,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:58:41,266 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)] === [2023-11-24 21:58:41,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:41,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1545113523, now seen corresponding path program 4 times [2023-11-24 21:58:41,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:41,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405982771] [2023-11-24 21:58:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:41,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:41,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405982771] [2023-11-24 21:58:41,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405982771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:41,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695623949] [2023-11-24 21:58:41,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:58:41,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:41,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:41,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:41,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:58:41,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:58:41,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:41,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:58:41,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:41,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:41,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695623949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:41,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:41,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2023-11-24 21:58:41,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629034990] [2023-11-24 21:58:41,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:41,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:58:41,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:41,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:58:41,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:58:41,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:41,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:41,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:41,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:41,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:42,067 INFO L124 PetriNetUnfolderBase]: 301/595 cut-off events. [2023-11-24 21:58:42,068 INFO L125 PetriNetUnfolderBase]: For 1475/1475 co-relation queries the response was YES. [2023-11-24 21:58:42,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 595 events. 301/595 cut-off events. For 1475/1475 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2851 event pairs, 31 based on Foata normal form. 7/594 useless extension candidates. Maximal degree in co-relation 2278. Up to 181 conditions per place. [2023-11-24 21:58:42,077 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 48 selfloop transitions, 35 changer transitions 1/92 dead transitions. [2023-11-24 21:58:42,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 771 flow [2023-11-24 21:58:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:58:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:58:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2023-11-24 21:58:42,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810810810810811 [2023-11-24 21:58:42,080 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 252 transitions. [2023-11-24 21:58:42,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 252 transitions. [2023-11-24 21:58:42,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:42,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 252 transitions. [2023-11-24 21:58:42,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.2) internal successors, (252), 10 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,083 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,083 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 308 flow. Second operand 10 states and 252 transitions. [2023-11-24 21:58:42,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 771 flow [2023-11-24 21:58:42,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 749 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:42,092 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 546 flow [2023-11-24 21:58:42,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=546, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-11-24 21:58:42,094 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-11-24 21:58:42,094 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 546 flow [2023-11-24 21:58:42,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:42,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:42,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:42,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:42,301 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)] === [2023-11-24 21:58:42,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1672521275, now seen corresponding path program 5 times [2023-11-24 21:58:42,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:42,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575096645] [2023-11-24 21:58:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:42,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:42,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575096645] [2023-11-24 21:58:42,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575096645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:42,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:42,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:58:42,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591862621] [2023-11-24 21:58:42,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:42,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:42,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:42,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:42,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:42,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:42,573 INFO L124 PetriNetUnfolderBase]: 307/604 cut-off events. [2023-11-24 21:58:42,573 INFO L125 PetriNetUnfolderBase]: For 2911/2913 co-relation queries the response was YES. [2023-11-24 21:58:42,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 604 events. 307/604 cut-off events. For 2911/2913 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2860 event pairs, 97 based on Foata normal form. 2/601 useless extension candidates. Maximal degree in co-relation 2772. Up to 295 conditions per place. [2023-11-24 21:58:42,583 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 47 selfloop transitions, 20 changer transitions 1/76 dead transitions. [2023-11-24 21:58:42,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 821 flow [2023-11-24 21:58:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:58:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2023-11-24 21:58:42,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6918918918918919 [2023-11-24 21:58:42,585 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 128 transitions. [2023-11-24 21:58:42,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 128 transitions. [2023-11-24 21:58:42,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:42,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 128 transitions. [2023-11-24 21:58:42,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,587 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,587 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 546 flow. Second operand 5 states and 128 transitions. [2023-11-24 21:58:42,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 821 flow [2023-11-24 21:58:42,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 76 transitions, 755 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-11-24 21:58:42,602 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 585 flow [2023-11-24 21:58:42,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=585, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-11-24 21:58:42,603 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 32 predicate places. [2023-11-24 21:58:42,603 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 585 flow [2023-11-24 21:58:42,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:42,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:42,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:58:42,604 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)] === [2023-11-24 21:58:42,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash -103592733, now seen corresponding path program 6 times [2023-11-24 21:58:42,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:42,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297396006] [2023-11-24 21:58:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:42,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:42,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:42,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297396006] [2023-11-24 21:58:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297396006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:42,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:42,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:58:42,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897761966] [2023-11-24 21:58:42,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:42,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:58:42,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:42,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:58:42,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:58:42,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:42,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 585 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:42,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:42,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:42,959 INFO L124 PetriNetUnfolderBase]: 302/592 cut-off events. [2023-11-24 21:58:42,960 INFO L125 PetriNetUnfolderBase]: For 3194/3196 co-relation queries the response was YES. [2023-11-24 21:58:42,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 592 events. 302/592 cut-off events. For 3194/3196 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2773 event pairs, 93 based on Foata normal form. 7/594 useless extension candidates. Maximal degree in co-relation 2762. Up to 275 conditions per place. [2023-11-24 21:58:42,970 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 45 selfloop transitions, 26 changer transitions 0/79 dead transitions. [2023-11-24 21:58:42,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 830 flow [2023-11-24 21:58:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:58:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:58:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2023-11-24 21:58:42,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6801801801801802 [2023-11-24 21:58:42,972 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 151 transitions. [2023-11-24 21:58:42,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 151 transitions. [2023-11-24 21:58:42,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:42,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 151 transitions. [2023-11-24 21:58:42,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,974 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,974 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 585 flow. Second operand 6 states and 151 transitions. [2023-11-24 21:58:42,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 830 flow [2023-11-24 21:58:42,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 780 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-11-24 21:58:42,987 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 613 flow [2023-11-24 21:58:42,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=613, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-11-24 21:58:42,988 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 33 predicate places. [2023-11-24 21:58:42,988 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 613 flow [2023-11-24 21:58:42,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:42,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:42,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:42,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:58:42,989 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)] === [2023-11-24 21:58:42,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1656212771, now seen corresponding path program 1 times [2023-11-24 21:58:42,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:42,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506840462] [2023-11-24 21:58:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:43,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:43,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506840462] [2023-11-24 21:58:43,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506840462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:43,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229806766] [2023-11-24 21:58:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:43,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:43,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:43,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:43,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:58:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:43,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:58:43,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:58:43,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:58:43,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229806766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:43,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:58:43,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-24 21:58:43,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879026635] [2023-11-24 21:58:43,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:43,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:43,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:43,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:43,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:43,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-24 21:58:43,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 613 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:43,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:43,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-24 21:58:43,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:43,513 INFO L124 PetriNetUnfolderBase]: 476/1008 cut-off events. [2023-11-24 21:58:43,514 INFO L125 PetriNetUnfolderBase]: For 5216/5281 co-relation queries the response was YES. [2023-11-24 21:58:43,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4590 conditions, 1008 events. 476/1008 cut-off events. For 5216/5281 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5698 event pairs, 90 based on Foata normal form. 18/1019 useless extension candidates. Maximal degree in co-relation 4561. Up to 357 conditions per place. [2023-11-24 21:58:43,529 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 71 selfloop transitions, 5 changer transitions 7/105 dead transitions. [2023-11-24 21:58:43,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 105 transitions, 1133 flow [2023-11-24 21:58:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:58:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2023-11-24 21:58:43,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7972972972972973 [2023-11-24 21:58:43,531 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2023-11-24 21:58:43,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2023-11-24 21:58:43,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:43,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2023-11-24 21:58:43,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:43,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:43,533 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:43,533 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 613 flow. Second operand 4 states and 118 transitions. [2023-11-24 21:58:43,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 105 transitions, 1133 flow [2023-11-24 21:58:43,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 105 transitions, 1072 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-24 21:58:43,550 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 609 flow [2023-11-24 21:58:43,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=609, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2023-11-24 21:58:43,551 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 35 predicate places. [2023-11-24 21:58:43,551 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 609 flow [2023-11-24 21:58:43,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:43,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:43,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:43,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:43,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:43,757 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)] === [2023-11-24 21:58:43,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash 17991866, now seen corresponding path program 2 times [2023-11-24 21:58:43,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:43,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856657018] [2023-11-24 21:58:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:43,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:44,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:44,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856657018] [2023-11-24 21:58:44,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856657018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:44,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278612346] [2023-11-24 21:58:44,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:58:44,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:44,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:44,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:44,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:58:44,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:58:44,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:44,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:58:44,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:44,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:44,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278612346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:44,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:44,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-24 21:58:44,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356932105] [2023-11-24 21:58:44,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:44,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:58:44,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:44,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:58:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:58:44,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:44,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 609 flow. Second operand has 12 states, 12 states have (on average 20.75) internal successors, (249), 12 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:44,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:44,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:44,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:45,276 INFO L124 PetriNetUnfolderBase]: 920/1689 cut-off events. [2023-11-24 21:58:45,276 INFO L125 PetriNetUnfolderBase]: For 8771/8805 co-relation queries the response was YES. [2023-11-24 21:58:45,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8532 conditions, 1689 events. 920/1689 cut-off events. For 8771/8805 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9360 event pairs, 23 based on Foata normal form. 30/1707 useless extension candidates. Maximal degree in co-relation 8500. Up to 558 conditions per place. [2023-11-24 21:58:45,302 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 102 selfloop transitions, 104 changer transitions 21/237 dead transitions. [2023-11-24 21:58:45,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 237 transitions, 2573 flow [2023-11-24 21:58:45,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:58:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-24 21:58:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 558 transitions. [2023-11-24 21:58:45,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6556991774383079 [2023-11-24 21:58:45,306 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 558 transitions. [2023-11-24 21:58:45,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 558 transitions. [2023-11-24 21:58:45,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:45,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 558 transitions. [2023-11-24 21:58:45,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 24.26086956521739) internal successors, (558), 23 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) [2023-11-24 21:58:45,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:45,312 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:45,312 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 609 flow. Second operand 23 states and 558 transitions. [2023-11-24 21:58:45,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 237 transitions, 2573 flow [2023-11-24 21:58:45,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 237 transitions, 2549 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-24 21:58:45,335 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1861 flow [2023-11-24 21:58:45,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1861, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2023-11-24 21:58:45,336 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 68 predicate places. [2023-11-24 21:58:45,336 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1861 flow [2023-11-24 21:58:45,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.75) internal successors, (249), 12 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:45,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:45,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:45,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:45,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:45,543 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)] === [2023-11-24 21:58:45,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash -226318560, now seen corresponding path program 3 times [2023-11-24 21:58:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:45,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721267297] [2023-11-24 21:58:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:45,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:45,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:45,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721267297] [2023-11-24 21:58:45,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721267297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486836247] [2023-11-24 21:58:45,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:58:45,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:45,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:45,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:58:45,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:58:45,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:45,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:58:45,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:45,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:46,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486836247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:46,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:46,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-24 21:58:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609110677] [2023-11-24 21:58:46,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:46,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:58:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:58:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:58:46,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:46,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1861 flow. Second operand has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:46,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:46,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:46,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:46,952 INFO L124 PetriNetUnfolderBase]: 994/1853 cut-off events. [2023-11-24 21:58:46,955 INFO L125 PetriNetUnfolderBase]: For 16190/16212 co-relation queries the response was YES. [2023-11-24 21:58:46,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10942 conditions, 1853 events. 994/1853 cut-off events. For 16190/16212 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10640 event pairs, 107 based on Foata normal form. 18/1863 useless extension candidates. Maximal degree in co-relation 10899. Up to 733 conditions per place. [2023-11-24 21:58:46,995 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 129 selfloop transitions, 102 changer transitions 5/246 dead transitions. [2023-11-24 21:58:46,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 246 transitions, 3497 flow [2023-11-24 21:58:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:58:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-24 21:58:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 360 transitions. [2023-11-24 21:58:46,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2023-11-24 21:58:46,998 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 360 transitions. [2023-11-24 21:58:46,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 360 transitions. [2023-11-24 21:58:46,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:46,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 360 transitions. [2023-11-24 21:58:47,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:47,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:47,005 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:47,005 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1861 flow. Second operand 15 states and 360 transitions. [2023-11-24 21:58:47,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 246 transitions, 3497 flow [2023-11-24 21:58:47,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 246 transitions, 2907 flow, removed 285 selfloop flow, removed 3 redundant places. [2023-11-24 21:58:47,113 INFO L231 Difference]: Finished difference. Result has 124 places, 186 transitions, 2256 flow [2023-11-24 21:58:47,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2256, PETRI_PLACES=124, PETRI_TRANSITIONS=186} [2023-11-24 21:58:47,115 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 85 predicate places. [2023-11-24 21:58:47,115 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 186 transitions, 2256 flow [2023-11-24 21:58:47,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:47,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:47,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:47,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:47,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:58:47,321 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)] === [2023-11-24 21:58:47,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:47,322 INFO L85 PathProgramCache]: Analyzing trace with hash -705273246, now seen corresponding path program 4 times [2023-11-24 21:58:47,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:47,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444934716] [2023-11-24 21:58:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:47,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:47,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:47,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444934716] [2023-11-24 21:58:47,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444934716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:47,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679769158] [2023-11-24 21:58:47,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:58:47,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:47,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:47,528 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:47,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:58:47,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:58:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:47,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:58:47,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:47,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:47,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679769158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:47,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:47,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-24 21:58:47,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923925898] [2023-11-24 21:58:47,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:47,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:58:47,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:47,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:58:47,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:58:47,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:47,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 186 transitions, 2256 flow. Second operand has 14 states, 14 states have (on average 21.071428571428573) internal successors, (295), 14 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:47,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:47,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:47,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:49,372 INFO L124 PetriNetUnfolderBase]: 1447/2658 cut-off events. [2023-11-24 21:58:49,372 INFO L125 PetriNetUnfolderBase]: For 18326/18356 co-relation queries the response was YES. [2023-11-24 21:58:49,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13287 conditions, 2658 events. 1447/2658 cut-off events. For 18326/18356 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15918 event pairs, 43 based on Foata normal form. 81/2725 useless extension candidates. Maximal degree in co-relation 13239. Up to 583 conditions per place. [2023-11-24 21:58:49,430 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 145 selfloop transitions, 240 changer transitions 3/398 dead transitions. [2023-11-24 21:58:49,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 398 transitions, 4911 flow [2023-11-24 21:58:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-24 21:58:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-24 21:58:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 796 transitions. [2023-11-24 21:58:49,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519246519246519 [2023-11-24 21:58:49,436 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 796 transitions. [2023-11-24 21:58:49,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 796 transitions. [2023-11-24 21:58:49,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:49,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 796 transitions. [2023-11-24 21:58:49,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 24.12121212121212) internal successors, (796), 33 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 37.0) internal successors, (1258), 34 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,450 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 37.0) internal successors, (1258), 34 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,450 INFO L175 Difference]: Start difference. First operand has 124 places, 186 transitions, 2256 flow. Second operand 33 states and 796 transitions. [2023-11-24 21:58:49,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 398 transitions, 4911 flow [2023-11-24 21:58:49,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 398 transitions, 4828 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-11-24 21:58:49,557 INFO L231 Difference]: Finished difference. Result has 169 places, 292 transitions, 4067 flow [2023-11-24 21:58:49,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4067, PETRI_PLACES=169, PETRI_TRANSITIONS=292} [2023-11-24 21:58:49,559 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 130 predicate places. [2023-11-24 21:58:49,559 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 292 transitions, 4067 flow [2023-11-24 21:58:49,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.071428571428573) internal successors, (295), 14 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:49,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:49,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:49,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:58:49,765 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)] === [2023-11-24 21:58:49,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1327097142, now seen corresponding path program 5 times [2023-11-24 21:58:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:49,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451106219] [2023-11-24 21:58:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:49,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:49,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451106219] [2023-11-24 21:58:49,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451106219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:49,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191258520] [2023-11-24 21:58:49,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:58:49,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:49,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:49,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:49,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:58:50,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:58:50,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:50,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:58:50,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:50,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:50,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191258520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:50,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:50,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-24 21:58:50,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273741947] [2023-11-24 21:58:50,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:50,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:58:50,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:50,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:58:50,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:58:50,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:50,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 292 transitions, 4067 flow. Second operand has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:50,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:50,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:50,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:53,038 INFO L124 PetriNetUnfolderBase]: 2025/3812 cut-off events. [2023-11-24 21:58:53,039 INFO L125 PetriNetUnfolderBase]: For 52381/52412 co-relation queries the response was YES. [2023-11-24 21:58:53,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21742 conditions, 3812 events. 2025/3812 cut-off events. For 52381/52412 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25129 event pairs, 70 based on Foata normal form. 91/3883 useless extension candidates. Maximal degree in co-relation 21678. Up to 865 conditions per place. [2023-11-24 21:58:53,102 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 167 selfloop transitions, 368 changer transitions 7/552 dead transitions. [2023-11-24 21:58:53,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 552 transitions, 7998 flow [2023-11-24 21:58:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-24 21:58:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-24 21:58:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 859 transitions. [2023-11-24 21:58:53,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274653031409788 [2023-11-24 21:58:53,106 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 859 transitions. [2023-11-24 21:58:53,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 859 transitions. [2023-11-24 21:58:53,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:53,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 859 transitions. [2023-11-24 21:58:53,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 23.216216216216218) internal successors, (859), 37 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:53,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 37.0) internal successors, (1406), 38 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:53,113 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 37.0) internal successors, (1406), 38 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:53,114 INFO L175 Difference]: Start difference. First operand has 169 places, 292 transitions, 4067 flow. Second operand 37 states and 859 transitions. [2023-11-24 21:58:53,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 552 transitions, 7998 flow [2023-11-24 21:58:53,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 552 transitions, 7672 flow, removed 138 selfloop flow, removed 3 redundant places. [2023-11-24 21:58:53,438 INFO L231 Difference]: Finished difference. Result has 217 places, 426 transitions, 6744 flow [2023-11-24 21:58:53,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6744, PETRI_PLACES=217, PETRI_TRANSITIONS=426} [2023-11-24 21:58:53,439 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 178 predicate places. [2023-11-24 21:58:53,439 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 426 transitions, 6744 flow [2023-11-24 21:58:53,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:53,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:53,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:53,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-24 21:58:53,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:58:53,644 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)] === [2023-11-24 21:58:53,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1842752714, now seen corresponding path program 6 times [2023-11-24 21:58:53,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:53,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964773160] [2023-11-24 21:58:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:53,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:53,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:53,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964773160] [2023-11-24 21:58:53,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964773160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972927400] [2023-11-24 21:58:53,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:58:53,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:53,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:53,876 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:53,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:58:53,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 21:58:53,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:53,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:58:53,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:54,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:54,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972927400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:54,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:54,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-24 21:58:54,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594900789] [2023-11-24 21:58:54,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:54,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:58:54,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:58:54,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:58:54,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:54,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 426 transitions, 6744 flow. Second operand has 16 states, 16 states have (on average 20.5625) internal successors, (329), 16 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:54,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:54,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:54,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:56,555 INFO L124 PetriNetUnfolderBase]: 2639/4983 cut-off events. [2023-11-24 21:58:56,556 INFO L125 PetriNetUnfolderBase]: For 93337/93377 co-relation queries the response was YES. [2023-11-24 21:58:56,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32209 conditions, 4983 events. 2639/4983 cut-off events. For 93337/93377 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 34578 event pairs, 171 based on Foata normal form. 66/5019 useless extension candidates. Maximal degree in co-relation 32131. Up to 1030 conditions per place. [2023-11-24 21:58:56,672 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 170 selfloop transitions, 471 changer transitions 9/660 dead transitions. [2023-11-24 21:58:56,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 660 transitions, 11350 flow [2023-11-24 21:58:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-24 21:58:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-24 21:58:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 670 transitions. [2023-11-24 21:58:56,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467181467181468 [2023-11-24 21:58:56,676 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 670 transitions. [2023-11-24 21:58:56,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 670 transitions. [2023-11-24 21:58:56,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:56,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 670 transitions. [2023-11-24 21:58:56,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 23.928571428571427) internal successors, (670), 28 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:56,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:56,682 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:56,682 INFO L175 Difference]: Start difference. First operand has 217 places, 426 transitions, 6744 flow. Second operand 28 states and 670 transitions. [2023-11-24 21:58:56,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 660 transitions, 11350 flow [2023-11-24 21:58:57,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 660 transitions, 10563 flow, removed 178 selfloop flow, removed 10 redundant places. [2023-11-24 21:58:57,516 INFO L231 Difference]: Finished difference. Result has 247 places, 579 transitions, 10424 flow [2023-11-24 21:58:57,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10424, PETRI_PLACES=247, PETRI_TRANSITIONS=579} [2023-11-24 21:58:57,517 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 208 predicate places. [2023-11-24 21:58:57,518 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 579 transitions, 10424 flow [2023-11-24 21:58:57,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.5625) internal successors, (329), 16 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:57,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:57,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:57,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:57,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 21:58:57,724 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)] === [2023-11-24 21:58:57,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:57,725 INFO L85 PathProgramCache]: Analyzing trace with hash -865346588, now seen corresponding path program 7 times [2023-11-24 21:58:57,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:57,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227920246] [2023-11-24 21:58:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:57,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:57,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:57,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227920246] [2023-11-24 21:58:57,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227920246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:57,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585859963] [2023-11-24 21:58:57,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:58:57,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:57,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:57,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:57,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:58:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:58,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:58:58,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:58,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:58,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585859963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:58,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:58,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-24 21:58:58,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382261412] [2023-11-24 21:58:58,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:58,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:58:58,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:58:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:58:58,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:58:58,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 579 transitions, 10424 flow. Second operand has 14 states, 14 states have (on average 20.571428571428573) internal successors, (288), 14 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:58,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:58,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:58:58,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:00,778 INFO L124 PetriNetUnfolderBase]: 3051/5679 cut-off events. [2023-11-24 21:59:00,778 INFO L125 PetriNetUnfolderBase]: For 147343/147376 co-relation queries the response was YES. [2023-11-24 21:59:00,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42011 conditions, 5679 events. 3051/5679 cut-off events. For 147343/147376 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39379 event pairs, 202 based on Foata normal form. 48/5693 useless extension candidates. Maximal degree in co-relation 41926. Up to 1246 conditions per place. [2023-11-24 21:59:00,864 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 301 selfloop transitions, 431 changer transitions 4/746 dead transitions. [2023-11-24 21:59:00,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 746 transitions, 15072 flow [2023-11-24 21:59:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:59:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-24 21:59:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 572 transitions. [2023-11-24 21:59:00,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6721504112808461 [2023-11-24 21:59:00,867 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 572 transitions. [2023-11-24 21:59:00,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 572 transitions. [2023-11-24 21:59:00,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:00,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 572 transitions. [2023-11-24 21:59:00,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 24.869565217391305) internal successors, (572), 23 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:00,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:00,872 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 37.0) internal successors, (888), 24 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:00,872 INFO L175 Difference]: Start difference. First operand has 247 places, 579 transitions, 10424 flow. Second operand 23 states and 572 transitions. [2023-11-24 21:59:00,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 746 transitions, 15072 flow [2023-11-24 21:59:02,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 746 transitions, 14140 flow, removed 366 selfloop flow, removed 12 redundant places. [2023-11-24 21:59:02,511 INFO L231 Difference]: Finished difference. Result has 259 places, 652 transitions, 12999 flow [2023-11-24 21:59:02,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9705, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12999, PETRI_PLACES=259, PETRI_TRANSITIONS=652} [2023-11-24 21:59:02,512 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 220 predicate places. [2023-11-24 21:59:02,512 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 652 transitions, 12999 flow [2023-11-24 21:59:02,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.571428571428573) internal successors, (288), 14 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:02,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:02,513 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:02,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-24 21:59:02,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 21:59:02,714 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)] === [2023-11-24 21:59:02,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1265350914, now seen corresponding path program 8 times [2023-11-24 21:59:02,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:02,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310610251] [2023-11-24 21:59:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:02,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:02,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:02,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310610251] [2023-11-24 21:59:02,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310610251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:02,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382091120] [2023-11-24 21:59:02,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:59:02,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:02,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:02,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:02,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:59:03,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:59:03,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:03,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:59:03,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:03,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:03,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382091120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:03,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:03,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-24 21:59:03,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205919170] [2023-11-24 21:59:03,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:03,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:59:03,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:59:03,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:59:03,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:59:03,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 652 transitions, 12999 flow. Second operand has 15 states, 15 states have (on average 20.466666666666665) internal successors, (307), 15 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:03,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:03,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:59:03,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:05,268 INFO L124 PetriNetUnfolderBase]: 3054/5639 cut-off events. [2023-11-24 21:59:05,268 INFO L125 PetriNetUnfolderBase]: For 128645/128679 co-relation queries the response was YES. [2023-11-24 21:59:05,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42972 conditions, 5639 events. 3054/5639 cut-off events. For 128645/128679 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 38995 event pairs, 489 based on Foata normal form. 38/5629 useless extension candidates. Maximal degree in co-relation 42886. Up to 2188 conditions per place. [2023-11-24 21:59:05,373 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 316 selfloop transitions, 364 changer transitions 3/693 dead transitions. [2023-11-24 21:59:05,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 693 transitions, 14765 flow [2023-11-24 21:59:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:59:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:59:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 343 transitions. [2023-11-24 21:59:05,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6621621621621622 [2023-11-24 21:59:05,375 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 343 transitions. [2023-11-24 21:59:05,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 343 transitions. [2023-11-24 21:59:05,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:05,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 343 transitions. [2023-11-24 21:59:05,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 24.5) internal successors, (343), 14 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:05,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 37.0) internal successors, (555), 15 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:05,379 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 37.0) internal successors, (555), 15 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:05,379 INFO L175 Difference]: Start difference. First operand has 259 places, 652 transitions, 12999 flow. Second operand 14 states and 343 transitions. [2023-11-24 21:59:05,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 693 transitions, 14765 flow [2023-11-24 21:59:07,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 693 transitions, 13935 flow, removed 401 selfloop flow, removed 3 redundant places. [2023-11-24 21:59:07,284 INFO L231 Difference]: Finished difference. Result has 268 places, 651 transitions, 12981 flow [2023-11-24 21:59:07,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12215, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12981, PETRI_PLACES=268, PETRI_TRANSITIONS=651} [2023-11-24 21:59:07,285 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 229 predicate places. [2023-11-24 21:59:07,285 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 651 transitions, 12981 flow [2023-11-24 21:59:07,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.466666666666665) internal successors, (307), 15 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:07,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:07,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:07,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:07,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:07,486 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)] === [2023-11-24 21:59:07,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1927694978, now seen corresponding path program 9 times [2023-11-24 21:59:07,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:07,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19019832] [2023-11-24 21:59:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:07,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:07,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:07,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19019832] [2023-11-24 21:59:07,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19019832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:07,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986539166] [2023-11-24 21:59:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:59:07,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:07,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:07,661 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:07,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:59:07,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:59:07,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:07,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:59:07,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:07,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:08,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986539166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:08,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:08,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-24 21:59:08,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251304620] [2023-11-24 21:59:08,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:08,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:59:08,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:08,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:59:08,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:59:08,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:59:08,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 651 transitions, 12981 flow. Second operand has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:08,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:59:08,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:11,802 INFO L124 PetriNetUnfolderBase]: 4164/7786 cut-off events. [2023-11-24 21:59:11,802 INFO L125 PetriNetUnfolderBase]: For 122579/122622 co-relation queries the response was YES. [2023-11-24 21:59:11,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58415 conditions, 7786 events. 4164/7786 cut-off events. For 122579/122622 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 57131 event pairs, 323 based on Foata normal form. 122/7826 useless extension candidates. Maximal degree in co-relation 58328. Up to 1452 conditions per place. [2023-11-24 21:59:12,036 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 344 selfloop transitions, 731 changer transitions 1/1086 dead transitions. [2023-11-24 21:59:12,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1086 transitions, 22693 flow [2023-11-24 21:59:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-24 21:59:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-24 21:59:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 1024 transitions. [2023-11-24 21:59:12,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436203645505971 [2023-11-24 21:59:12,060 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 1024 transitions. [2023-11-24 21:59:12,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 1024 transitions. [2023-11-24 21:59:12,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:12,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 1024 transitions. [2023-11-24 21:59:12,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 23.813953488372093) internal successors, (1024), 43 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:12,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 37.0) internal successors, (1628), 44 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:12,072 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 37.0) internal successors, (1628), 44 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:12,072 INFO L175 Difference]: Start difference. First operand has 268 places, 651 transitions, 12981 flow. Second operand 43 states and 1024 transitions. [2023-11-24 21:59:12,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1086 transitions, 22693 flow [2023-11-24 21:59:14,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1086 transitions, 21909 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-11-24 21:59:14,092 INFO L231 Difference]: Finished difference. Result has 315 places, 928 transitions, 21018 flow [2023-11-24 21:59:14,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12420, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=21018, PETRI_PLACES=315, PETRI_TRANSITIONS=928} [2023-11-24 21:59:14,093 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 276 predicate places. [2023-11-24 21:59:14,094 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 928 transitions, 21018 flow [2023-11-24 21:59:14,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:14,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:14,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:14,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:14,300 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)] === [2023-11-24 21:59:14,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1146733300, now seen corresponding path program 10 times [2023-11-24 21:59:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:14,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769848965] [2023-11-24 21:59:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:14,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:14,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:14,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769848965] [2023-11-24 21:59:14,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769848965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:14,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061550227] [2023-11-24 21:59:14,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:59:14,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:14,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:14,484 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:14,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:59:14,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:59:14,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:14,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:59:14,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:14,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:14,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061550227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:14,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:14,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-24 21:59:14,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496308333] [2023-11-24 21:59:14,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:14,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:59:14,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:14,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:59:14,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:59:14,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:59:14,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 928 transitions, 21018 flow. Second operand has 13 states, 13 states have (on average 20.384615384615383) internal successors, (265), 13 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:14,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:59:14,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:18,689 INFO L124 PetriNetUnfolderBase]: 4258/7927 cut-off events. [2023-11-24 21:59:18,689 INFO L125 PetriNetUnfolderBase]: For 154459/154495 co-relation queries the response was YES. [2023-11-24 21:59:18,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65001 conditions, 7927 events. 4258/7927 cut-off events. For 154459/154495 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 57985 event pairs, 1449 based on Foata normal form. 46/7902 useless extension candidates. Maximal degree in co-relation 64897. Up to 5638 conditions per place. [2023-11-24 21:59:18,856 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 815 selfloop transitions, 175 changer transitions 4/1004 dead transitions. [2023-11-24 21:59:18,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1004 transitions, 24303 flow [2023-11-24 21:59:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:59:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:59:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2023-11-24 21:59:18,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2023-11-24 21:59:18,858 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 282 transitions. [2023-11-24 21:59:18,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 282 transitions. [2023-11-24 21:59:18,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:18,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 282 transitions. [2023-11-24 21:59:18,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 23.5) internal successors, (282), 12 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:18,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:18,862 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:18,862 INFO L175 Difference]: Start difference. First operand has 315 places, 928 transitions, 21018 flow. Second operand 12 states and 282 transitions. [2023-11-24 21:59:18,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1004 transitions, 24303 flow [2023-11-24 21:59:21,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1004 transitions, 23944 flow, removed 54 selfloop flow, removed 10 redundant places. [2023-11-24 21:59:21,930 INFO L231 Difference]: Finished difference. Result has 322 places, 954 transitions, 21881 flow [2023-11-24 21:59:21,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=20667, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21881, PETRI_PLACES=322, PETRI_TRANSITIONS=954} [2023-11-24 21:59:21,931 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 283 predicate places. [2023-11-24 21:59:21,931 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 954 transitions, 21881 flow [2023-11-24 21:59:21,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.384615384615383) internal successors, (265), 13 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:21,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:21,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:21,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:22,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-24 21:59:22,137 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)] === [2023-11-24 21:59:22,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:22,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1199847798, now seen corresponding path program 11 times [2023-11-24 21:59:22,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:22,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120218588] [2023-11-24 21:59:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:22,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:22,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120218588] [2023-11-24 21:59:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120218588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421774117] [2023-11-24 21:59:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:59:22,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:22,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:22,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:22,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5c4052-c638-460b-a6cb-ee21e6c9fd8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:59:22,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-24 21:59:22,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:22,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:59:22,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:22,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421774117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:22,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:22,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-11-24 21:59:22,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819226352] [2023-11-24 21:59:22,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:22,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:59:22,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:59:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:59:22,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2023-11-24 21:59:22,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 954 transitions, 21881 flow. Second operand has 15 states, 15 states have (on average 20.266666666666666) internal successors, (304), 15 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:22,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:22,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2023-11-24 21:59:22,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:28,990 INFO L124 PetriNetUnfolderBase]: 6016/11168 cut-off events. [2023-11-24 21:59:28,990 INFO L125 PetriNetUnfolderBase]: For 234069/234120 co-relation queries the response was YES. [2023-11-24 21:59:29,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92942 conditions, 11168 events. 6016/11168 cut-off events. For 234069/234120 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 85546 event pairs, 832 based on Foata normal form. 170/11247 useless extension candidates. Maximal degree in co-relation 92831. Up to 3231 conditions per place. [2023-11-24 21:59:29,295 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 784 selfloop transitions, 757 changer transitions 2/1553 dead transitions. [2023-11-24 21:59:29,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1553 transitions, 37462 flow [2023-11-24 21:59:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-24 21:59:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-24 21:59:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 923 transitions. [2023-11-24 21:59:29,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564722617354196 [2023-11-24 21:59:29,299 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 923 transitions. [2023-11-24 21:59:29,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 923 transitions. [2023-11-24 21:59:29,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:29,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 923 transitions. [2023-11-24 21:59:29,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 24.289473684210527) internal successors, (923), 38 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:29,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 37.0) internal successors, (1443), 39 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:29,307 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 37.0) internal successors, (1443), 39 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:29,307 INFO L175 Difference]: Start difference. First operand has 322 places, 954 transitions, 21881 flow. Second operand 38 states and 923 transitions. [2023-11-24 21:59:29,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1553 transitions, 37462 flow