./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:42:24,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:42:24,775 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 20:42:24,780 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:42:24,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:42:24,807 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:42:24,808 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:42:24,808 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:42:24,809 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:42:24,810 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:42:24,810 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:42:24,811 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:42:24,812 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:42:24,812 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:42:24,813 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:42:24,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:42:24,814 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:42:24,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:42:24,815 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:42:24,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:42:24,816 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 20:42:24,817 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 20:42:24,817 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 20:42:24,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:42:24,818 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:42:24,819 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:42:24,819 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:42:24,819 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:42:24,820 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:42:24,820 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:42:24,821 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:42:24,821 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:42:24,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:42:24,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:42:24,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:42:24,822 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:42:24,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:42:24,822 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:42:24,822 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:42:24,823 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:42:24,823 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:42:24,823 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_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2023-11-28 20:42:25,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:42:25,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:42:25,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:42:25,133 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:42:25,133 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:42:25,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-28 20:42:27,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:42:28,066 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:42:28,067 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-28 20:42:28,076 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/data/003a19016/05f0e7f2476340859f7b3209b13e32c1/FLAGe43c76e22 [2023-11-28 20:42:28,089 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/data/003a19016/05f0e7f2476340859f7b3209b13e32c1 [2023-11-28 20:42:28,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:42:28,094 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:42:28,096 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:42:28,097 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:42:28,111 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:42:28,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,113 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773d6935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28, skipping insertion in model container [2023-11-28 20:42:28,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,158 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:42:28,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:42:28,369 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:42:28,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:42:28,400 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:42:28,401 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:42:28,409 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:42:28,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28 WrapperNode [2023-11-28 20:42:28,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:42:28,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:42:28,411 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:42:28,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:42:28,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,450 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2023-11-28 20:42:28,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:42:28,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:42:28,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:42:28,452 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:42:28,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,469 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,486 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]. [2023-11-28 20:42:28,487 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,487 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,497 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,499 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,504 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:42:28,505 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:42:28,505 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:42:28,505 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:42:28,506 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (1/1) ... [2023-11-28 20:42:28,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:42:28,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:28,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:42:28,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:42:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:42:28,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 20:42:28,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 20:42:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 20:42:28,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 20:42:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:42:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:42:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:42:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:42:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:42:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:42:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:42:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-28 20:42:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-28 20:42:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:42:28,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:42:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:42:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:42:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:42:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:42:28,592 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:42:28,712 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:42:28,715 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:42:28,929 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:42:29,101 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:42:29,102 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-28 20:42:29,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:42:29 BoogieIcfgContainer [2023-11-28 20:42:29,102 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:42:29,106 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:42:29,106 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:42:29,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:42:29,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:42:28" (1/3) ... [2023-11-28 20:42:29,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bac9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:42:29, skipping insertion in model container [2023-11-28 20:42:29,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:42:28" (2/3) ... [2023-11-28 20:42:29,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bac9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:42:29, skipping insertion in model container [2023-11-28 20:42:29,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:42:29" (3/3) ... [2023-11-28 20:42:29,115 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-28 20:42:29,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:42:29,136 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-28 20:42:29,136 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:42:29,189 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-28 20:42:29,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 86 flow [2023-11-28 20:42:29,258 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-11-28 20:42:29,259 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 20:42:29,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 2/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-28 20:42:29,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 36 transitions, 86 flow [2023-11-28 20:42:29,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 78 flow [2023-11-28 20:42:29,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:42:29,281 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;@6a52b9a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:42:29,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-28 20:42:29,285 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:42:29,285 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-28 20:42:29,285 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 20:42:29,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:29,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-28 20:42:29,287 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)] === [2023-11-28 20:42:29,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash 8906, now seen corresponding path program 1 times [2023-11-28 20:42:29,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:29,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554715884] [2023-11-28 20:42:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:29,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:29,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:29,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554715884] [2023-11-28 20:42:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554715884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:29,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:29,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:42:29,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949240842] [2023-11-28 20:42:29,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:29,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:42:29,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:42:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:42:29,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-28 20:42:29,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:29,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:29,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-28 20:42:29,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:29,780 INFO L124 PetriNetUnfolderBase]: 72/159 cut-off events. [2023-11-28 20:42:29,781 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-28 20:42:29,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 159 events. 72/159 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 512 event pairs, 48 based on Foata normal form. 1/142 useless extension candidates. Maximal degree in co-relation 254. Up to 123 conditions per place. [2023-11-28 20:42:29,785 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-28 20:42:29,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 104 flow [2023-11-28 20:42:29,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:42:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:42:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-28 20:42:29,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2023-11-28 20:42:29,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-28 20:42:29,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-28 20:42:29,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:29,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-28 20:42:29,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:29,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:29,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:29,806 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 78 flow. Second operand 3 states and 65 transitions. [2023-11-28 20:42:29,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 104 flow [2023-11-28 20:42:29,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:42:29,811 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-28 20:42:29,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-28 20:42:29,817 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-28 20:42:29,817 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-28 20:42:29,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:29,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:29,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-28 20:42:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:42:29,818 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)] === [2023-11-28 20:42:29,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash 8907, now seen corresponding path program 1 times [2023-11-28 20:42:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076493662] [2023-11-28 20:42:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:29,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:29,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:29,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076493662] [2023-11-28 20:42:29,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076493662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:29,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:29,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:42:29,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388297726] [2023-11-28 20:42:29,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:29,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:42:29,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:42:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:42:30,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:30,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:30,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:30,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:30,064 INFO L124 PetriNetUnfolderBase]: 48/115 cut-off events. [2023-11-28 20:42:30,064 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-28 20:42:30,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 115 events. 48/115 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 364 event pairs, 31 based on Foata normal form. 13/117 useless extension candidates. Maximal degree in co-relation 204. Up to 86 conditions per place. [2023-11-28 20:42:30,066 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-28 20:42:30,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 90 flow [2023-11-28 20:42:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:42:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:42:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-28 20:42:30,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-28 20:42:30,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-28 20:42:30,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-28 20:42:30,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:30,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-28 20:42:30,071 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) [2023-11-28 20:42:30,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,072 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 68 transitions. [2023-11-28 20:42:30,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 90 flow [2023-11-28 20:42:30,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:42:30,075 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 61 flow [2023-11-28 20:42:30,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-28 20:42:30,076 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-28 20:42:30,076 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 61 flow [2023-11-28 20:42:30,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:30,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:42:30,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:42:30,077 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)] === [2023-11-28 20:42:30,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash 265553134, now seen corresponding path program 1 times [2023-11-28 20:42:30,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:30,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213977717] [2023-11-28 20:42:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:30,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:30,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213977717] [2023-11-28 20:42:30,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213977717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:30,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:30,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:42:30,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338962624] [2023-11-28 20:42:30,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:30,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:42:30,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:42:30,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:42:30,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-28 20:42:30,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:30,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-28 20:42:30,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:30,217 INFO L124 PetriNetUnfolderBase]: 55/122 cut-off events. [2023-11-28 20:42:30,217 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-28 20:42:30,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 122 events. 55/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 361 event pairs, 36 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 225. Up to 100 conditions per place. [2023-11-28 20:42:30,219 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-28 20:42:30,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 91 flow [2023-11-28 20:42:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:42:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:42:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-28 20:42:30,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-28 20:42:30,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-28 20:42:30,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-28 20:42:30,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:30,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-28 20:42:30,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,225 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 61 flow. Second operand 3 states and 64 transitions. [2023-11-28 20:42:30,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 91 flow [2023-11-28 20:42:30,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:42:30,227 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-28 20:42:30,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-28 20:42:30,228 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-11-28 20:42:30,228 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-28 20:42:30,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:30,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:42:30,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:42:30,229 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)] === [2023-11-28 20:42:30,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:30,230 INFO L85 PathProgramCache]: Analyzing trace with hash 265553135, now seen corresponding path program 1 times [2023-11-28 20:42:30,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168154014] [2023-11-28 20:42:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:30,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:30,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:30,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168154014] [2023-11-28 20:42:30,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168154014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:30,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:30,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:42:30,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918036623] [2023-11-28 20:42:30,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:42:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:30,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:42:30,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:42:30,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:30,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:30,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:30,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:30,407 INFO L124 PetriNetUnfolderBase]: 48/107 cut-off events. [2023-11-28 20:42:30,407 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-28 20:42:30,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 107 events. 48/107 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 311 event pairs, 31 based on Foata normal form. 6/110 useless extension candidates. Maximal degree in co-relation 196. Up to 86 conditions per place. [2023-11-28 20:42:30,410 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-28 20:42:30,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 84 flow [2023-11-28 20:42:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:42:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:42:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-28 20:42:30,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-28 20:42:30,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-28 20:42:30,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-28 20:42:30,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:30,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-28 20:42:30,414 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) [2023-11-28 20:42:30,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,415 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 68 transitions. [2023-11-28 20:42:30,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 84 flow [2023-11-28 20:42:30,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 83 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:42:30,417 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-28 20:42:30,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-28 20:42:30,418 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-11-28 20:42:30,419 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-28 20:42:30,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:30,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:42:30,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:42:30,420 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)] === [2023-11-28 20:42:30,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1510092245, now seen corresponding path program 1 times [2023-11-28 20:42:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:30,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402681052] [2023-11-28 20:42:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:30,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:30,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402681052] [2023-11-28 20:42:30,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402681052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:30,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:30,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:42:30,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602810631] [2023-11-28 20:42:30,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:30,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:42:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:42:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:42:30,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-28 20:42:30,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:30,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-28 20:42:30,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:30,623 INFO L124 PetriNetUnfolderBase]: 70/154 cut-off events. [2023-11-28 20:42:30,624 INFO L125 PetriNetUnfolderBase]: For 3/5 co-relation queries the response was YES. [2023-11-28 20:42:30,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 154 events. 70/154 cut-off events. For 3/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 490 event pairs, 33 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 283. Up to 86 conditions per place. [2023-11-28 20:42:30,627 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 20 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-28 20:42:30,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 118 flow [2023-11-28 20:42:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:42:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:42:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2023-11-28 20:42:30,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-28 20:42:30,630 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 100 transitions. [2023-11-28 20:42:30,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 100 transitions. [2023-11-28 20:42:30,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:30,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 100 transitions. [2023-11-28 20:42:30,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,633 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,633 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 4 states and 100 transitions. [2023-11-28 20:42:30,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 118 flow [2023-11-28 20:42:30,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:42:30,635 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 68 flow [2023-11-28 20:42:30,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-28 20:42:30,636 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-28 20:42:30,637 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 68 flow [2023-11-28 20:42:30,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:30,637 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] [2023-11-28 20:42:30,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:42:30,638 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)] === [2023-11-28 20:42:30,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1119864072, now seen corresponding path program 1 times [2023-11-28 20:42:30,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:30,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979493645] [2023-11-28 20:42:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:30,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:30,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:30,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979493645] [2023-11-28 20:42:30,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979493645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:30,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:30,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:42:30,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897303880] [2023-11-28 20:42:30,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:30,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:42:30,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:30,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:42:30,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:42:30,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-28 20:42:30,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:30,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-28 20:42:30,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:30,819 INFO L124 PetriNetUnfolderBase]: 89/196 cut-off events. [2023-11-28 20:42:30,819 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-28 20:42:30,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 196 events. 89/196 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 689 event pairs, 49 based on Foata normal form. 13/206 useless extension candidates. Maximal degree in co-relation 407. Up to 124 conditions per place. [2023-11-28 20:42:30,822 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-28 20:42:30,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 143 flow [2023-11-28 20:42:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:42:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:42:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-28 20:42:30,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2023-11-28 20:42:30,824 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-28 20:42:30,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-28 20:42:30,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:30,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-28 20:42:30,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,827 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,827 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 68 flow. Second operand 4 states and 99 transitions. [2023-11-28 20:42:30,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 143 flow [2023-11-28 20:42:30,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:42:30,829 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 78 flow [2023-11-28 20:42:30,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-28 20:42:30,830 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-28 20:42:30,830 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 78 flow [2023-11-28 20:42:30,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:30,831 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] [2023-11-28 20:42:30,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:42:30,832 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)] === [2023-11-28 20:42:30,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:30,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1057413530, now seen corresponding path program 1 times [2023-11-28 20:42:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:30,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124794997] [2023-11-28 20:42:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:30,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:31,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:31,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124794997] [2023-11-28 20:42:31,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124794997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:31,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755140012] [2023-11-28 20:42:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:31,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:31,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:31,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:42:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:31,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:42:31,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:31,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:32,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755140012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:32,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:32,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:42:32,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006666778] [2023-11-28 20:42:32,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:42:32,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:42:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:42:32,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:32,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 78 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:32,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:32,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:32,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:33,848 INFO L124 PetriNetUnfolderBase]: 396/719 cut-off events. [2023-11-28 20:42:33,849 INFO L125 PetriNetUnfolderBase]: For 205/208 co-relation queries the response was YES. [2023-11-28 20:42:33,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 719 events. 396/719 cut-off events. For 205/208 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3178 event pairs, 22 based on Foata normal form. 4/723 useless extension candidates. Maximal degree in co-relation 1741. Up to 195 conditions per place. [2023-11-28 20:42:33,856 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 89 selfloop transitions, 64 changer transitions 13/172 dead transitions. [2023-11-28 20:42:33,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 172 transitions, 847 flow [2023-11-28 20:42:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-28 20:42:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-28 20:42:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 636 transitions. [2023-11-28 20:42:33,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2023-11-28 20:42:33,860 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 636 transitions. [2023-11-28 20:42:33,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 636 transitions. [2023-11-28 20:42:33,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:33,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 636 transitions. [2023-11-28 20:42:33,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 22.714285714285715) internal successors, (636), 28 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:33,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:33,869 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:33,869 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 78 flow. Second operand 28 states and 636 transitions. [2023-11-28 20:42:33,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 172 transitions, 847 flow [2023-11-28 20:42:33,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 172 transitions, 829 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:42:33,875 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 581 flow [2023-11-28 20:42:33,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=581, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2023-11-28 20:42:33,876 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-11-28 20:42:33,876 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 581 flow [2023-11-28 20:42:33,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:33,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:33,877 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] [2023-11-28 20:42:33,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:42:34,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:34,080 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)] === [2023-11-28 20:42:34,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2142819638, now seen corresponding path program 2 times [2023-11-28 20:42:34,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:34,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718433644] [2023-11-28 20:42:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:34,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:34,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718433644] [2023-11-28 20:42:34,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718433644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:34,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825254651] [2023-11-28 20:42:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:42:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:34,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:34,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:34,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:42:34,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:42:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:34,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:42:34,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:34,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:35,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825254651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:35,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:35,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:42:35,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202151193] [2023-11-28 20:42:35,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:35,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:42:35,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:35,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:42:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:42:35,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:35,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 581 flow. Second operand has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:35,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:35,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:37,096 INFO L124 PetriNetUnfolderBase]: 578/1099 cut-off events. [2023-11-28 20:42:37,096 INFO L125 PetriNetUnfolderBase]: For 2953/2958 co-relation queries the response was YES. [2023-11-28 20:42:37,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4416 conditions, 1099 events. 578/1099 cut-off events. For 2953/2958 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5719 event pairs, 44 based on Foata normal form. 5/1104 useless extension candidates. Maximal degree in co-relation 4386. Up to 222 conditions per place. [2023-11-28 20:42:37,111 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 113 selfloop transitions, 99 changer transitions 26/244 dead transitions. [2023-11-28 20:42:37,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 244 transitions, 1947 flow [2023-11-28 20:42:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-28 20:42:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-28 20:42:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 628 transitions. [2023-11-28 20:42:37,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6460905349794238 [2023-11-28 20:42:37,114 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 628 transitions. [2023-11-28 20:42:37,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 628 transitions. [2023-11-28 20:42:37,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:37,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 628 transitions. [2023-11-28 20:42:37,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 23.25925925925926) internal successors, (628), 27 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:37,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 36.0) internal successors, (1008), 28 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:37,121 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 36.0) internal successors, (1008), 28 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:37,121 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 581 flow. Second operand 27 states and 628 transitions. [2023-11-28 20:42:37,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 244 transitions, 1947 flow [2023-11-28 20:42:37,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 244 transitions, 1914 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-28 20:42:37,152 INFO L231 Difference]: Finished difference. Result has 112 places, 144 transitions, 1249 flow [2023-11-28 20:42:37,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1249, PETRI_PLACES=112, PETRI_TRANSITIONS=144} [2023-11-28 20:42:37,153 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 74 predicate places. [2023-11-28 20:42:37,153 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 144 transitions, 1249 flow [2023-11-28 20:42:37,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:37,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:37,154 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] [2023-11-28 20:42:37,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-28 20:42:37,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:37,355 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)] === [2023-11-28 20:42:37,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash 288002586, now seen corresponding path program 3 times [2023-11-28 20:42:37,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:37,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443397137] [2023-11-28 20:42:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:37,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:37,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:37,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443397137] [2023-11-28 20:42:37,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443397137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:37,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43195004] [2023-11-28 20:42:37,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:42:37,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:37,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:37,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:37,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:42:37,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:42:37,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:37,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:42:37,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:38,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:38,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43195004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:38,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:38,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:42:38,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149892812] [2023-11-28 20:42:38,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:38,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:42:38,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:42:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:42:38,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:38,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 144 transitions, 1249 flow. Second operand has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:38,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:38,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:38,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:40,148 INFO L124 PetriNetUnfolderBase]: 605/1169 cut-off events. [2023-11-28 20:42:40,149 INFO L125 PetriNetUnfolderBase]: For 6849/6855 co-relation queries the response was YES. [2023-11-28 20:42:40,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5874 conditions, 1169 events. 605/1169 cut-off events. For 6849/6855 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6256 event pairs, 33 based on Foata normal form. 7/1176 useless extension candidates. Maximal degree in co-relation 5831. Up to 233 conditions per place. [2023-11-28 20:42:40,171 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 107 selfloop transitions, 120 changer transitions 22/255 dead transitions. [2023-11-28 20:42:40,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 255 transitions, 2582 flow [2023-11-28 20:42:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-28 20:42:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-28 20:42:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 690 transitions. [2023-11-28 20:42:40,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-28 20:42:40,176 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 690 transitions. [2023-11-28 20:42:40,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 690 transitions. [2023-11-28 20:42:40,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:40,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 690 transitions. [2023-11-28 20:42:40,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 23.0) internal successors, (690), 30 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:40,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 36.0) internal successors, (1116), 31 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:40,183 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 36.0) internal successors, (1116), 31 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:40,183 INFO L175 Difference]: Start difference. First operand has 112 places, 144 transitions, 1249 flow. Second operand 30 states and 690 transitions. [2023-11-28 20:42:40,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 255 transitions, 2582 flow [2023-11-28 20:42:40,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 255 transitions, 2391 flow, removed 70 selfloop flow, removed 10 redundant places. [2023-11-28 20:42:40,257 INFO L231 Difference]: Finished difference. Result has 141 places, 162 transitions, 1757 flow [2023-11-28 20:42:40,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1757, PETRI_PLACES=141, PETRI_TRANSITIONS=162} [2023-11-28 20:42:40,258 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 103 predicate places. [2023-11-28 20:42:40,259 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 162 transitions, 1757 flow [2023-11-28 20:42:40,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:40,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:40,259 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] [2023-11-28 20:42:40,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:42:40,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:40,466 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)] === [2023-11-28 20:42:40,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:40,466 INFO L85 PathProgramCache]: Analyzing trace with hash -54529284, now seen corresponding path program 4 times [2023-11-28 20:42:40,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:40,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842180887] [2023-11-28 20:42:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:40,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:40,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:40,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842180887] [2023-11-28 20:42:40,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842180887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:40,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614353739] [2023-11-28 20:42:40,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:42:40,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:40,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:40,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:40,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:42:40,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:42:40,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:40,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:42:40,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:41,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:41,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614353739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:41,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:41,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2023-11-28 20:42:41,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448683599] [2023-11-28 20:42:41,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:41,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:42:41,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:42:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:42:41,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:41,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 162 transitions, 1757 flow. Second operand has 26 states, 26 states have (on average 18.846153846153847) internal successors, (490), 26 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:41,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:41,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:41,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:42,972 INFO L124 PetriNetUnfolderBase]: 749/1433 cut-off events. [2023-11-28 20:42:42,972 INFO L125 PetriNetUnfolderBase]: For 11129/11136 co-relation queries the response was YES. [2023-11-28 20:42:42,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8206 conditions, 1433 events. 749/1433 cut-off events. For 11129/11136 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8029 event pairs, 38 based on Foata normal form. 3/1436 useless extension candidates. Maximal degree in co-relation 8151. Up to 482 conditions per place. [2023-11-28 20:42:43,000 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 130 selfloop transitions, 171 changer transitions 17/324 dead transitions. [2023-11-28 20:42:43,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 324 transitions, 3950 flow [2023-11-28 20:42:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-28 20:42:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-28 20:42:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 731 transitions. [2023-11-28 20:42:43,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345486111111112 [2023-11-28 20:42:43,005 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 731 transitions. [2023-11-28 20:42:43,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 731 transitions. [2023-11-28 20:42:43,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:43,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 731 transitions. [2023-11-28 20:42:43,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 22.84375) internal successors, (731), 32 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:43,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 36.0) internal successors, (1188), 33 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:43,014 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 36.0) internal successors, (1188), 33 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:43,014 INFO L175 Difference]: Start difference. First operand has 141 places, 162 transitions, 1757 flow. Second operand 32 states and 731 transitions. [2023-11-28 20:42:43,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 324 transitions, 3950 flow [2023-11-28 20:42:43,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 324 transitions, 3550 flow, removed 88 selfloop flow, removed 19 redundant places. [2023-11-28 20:42:43,147 INFO L231 Difference]: Finished difference. Result has 166 places, 232 transitions, 2936 flow [2023-11-28 20:42:43,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2936, PETRI_PLACES=166, PETRI_TRANSITIONS=232} [2023-11-28 20:42:43,148 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 128 predicate places. [2023-11-28 20:42:43,149 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 232 transitions, 2936 flow [2023-11-28 20:42:43,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.846153846153847) internal successors, (490), 26 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:43,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:43,149 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] [2023-11-28 20:42:43,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:42:43,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:42:43,351 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)] === [2023-11-28 20:42:43,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash -567933888, now seen corresponding path program 5 times [2023-11-28 20:42:43,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:43,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005195520] [2023-11-28 20:42:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:43,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:43,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:43,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005195520] [2023-11-28 20:42:43,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005195520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:43,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497301130] [2023-11-28 20:42:43,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:42:43,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:43,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:43,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:43,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:42:43,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-28 20:42:43,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:43,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:42:43,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:44,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:44,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497301130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:44,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:44,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2023-11-28 20:42:44,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961524765] [2023-11-28 20:42:44,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:44,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:42:44,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:44,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:42:44,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:42:44,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:44,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 232 transitions, 2936 flow. Second operand has 26 states, 26 states have (on average 18.846153846153847) internal successors, (490), 26 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:44,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:44,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:44,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:45,955 INFO L124 PetriNetUnfolderBase]: 766/1469 cut-off events. [2023-11-28 20:42:45,955 INFO L125 PetriNetUnfolderBase]: For 14470/14477 co-relation queries the response was YES. [2023-11-28 20:42:45,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9354 conditions, 1469 events. 766/1469 cut-off events. For 14470/14477 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8233 event pairs, 18 based on Foata normal form. 7/1476 useless extension candidates. Maximal degree in co-relation 9286. Up to 490 conditions per place. [2023-11-28 20:42:45,975 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 138 selfloop transitions, 207 changer transitions 19/370 dead transitions. [2023-11-28 20:42:45,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 370 transitions, 5043 flow [2023-11-28 20:42:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-28 20:42:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-28 20:42:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 881 transitions. [2023-11-28 20:42:45,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118055555555556 [2023-11-28 20:42:45,977 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 881 transitions. [2023-11-28 20:42:45,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 881 transitions. [2023-11-28 20:42:45,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:45,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 881 transitions. [2023-11-28 20:42:45,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 22.025) internal successors, (881), 40 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:45,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 36.0) internal successors, (1476), 41 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:45,983 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 36.0) internal successors, (1476), 41 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:45,983 INFO L175 Difference]: Start difference. First operand has 166 places, 232 transitions, 2936 flow. Second operand 40 states and 881 transitions. [2023-11-28 20:42:45,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 370 transitions, 5043 flow [2023-11-28 20:42:46,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 370 transitions, 4860 flow, removed 88 selfloop flow, removed 4 redundant places. [2023-11-28 20:42:46,110 INFO L231 Difference]: Finished difference. Result has 206 places, 275 transitions, 3948 flow [2023-11-28 20:42:46,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3948, PETRI_PLACES=206, PETRI_TRANSITIONS=275} [2023-11-28 20:42:46,111 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 168 predicate places. [2023-11-28 20:42:46,111 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 275 transitions, 3948 flow [2023-11-28 20:42:46,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.846153846153847) internal successors, (490), 26 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:46,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:46,112 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] [2023-11-28 20:42:46,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:42:46,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:42:46,313 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)] === [2023-11-28 20:42:46,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:46,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1549653760, now seen corresponding path program 6 times [2023-11-28 20:42:46,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:46,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906782784] [2023-11-28 20:42:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:46,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:46,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:46,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906782784] [2023-11-28 20:42:46,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906782784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:46,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980502881] [2023-11-28 20:42:46,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:42:46,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:46,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:46,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:46,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:42:46,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:42:46,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:46,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:42:46,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:46,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:47,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980502881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:47,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:47,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:42:47,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576489718] [2023-11-28 20:42:47,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:47,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:42:47,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:47,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:42:47,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:42:47,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:47,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 275 transitions, 3948 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:47,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:47,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:47,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:48,790 INFO L124 PetriNetUnfolderBase]: 930/1786 cut-off events. [2023-11-28 20:42:48,791 INFO L125 PetriNetUnfolderBase]: For 21934/21937 co-relation queries the response was YES. [2023-11-28 20:42:48,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12505 conditions, 1786 events. 930/1786 cut-off events. For 21934/21937 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10325 event pairs, 45 based on Foata normal form. 4/1790 useless extension candidates. Maximal degree in co-relation 12429. Up to 375 conditions per place. [2023-11-28 20:42:48,813 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 180 selfloop transitions, 252 changer transitions 21/459 dead transitions. [2023-11-28 20:42:48,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 459 transitions, 7108 flow [2023-11-28 20:42:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-28 20:42:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-28 20:42:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 762 transitions. [2023-11-28 20:42:48,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2023-11-28 20:42:48,816 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 762 transitions. [2023-11-28 20:42:48,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 762 transitions. [2023-11-28 20:42:48,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:48,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 762 transitions. [2023-11-28 20:42:48,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 23.09090909090909) internal successors, (762), 33 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:48,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 36.0) internal successors, (1224), 34 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:48,823 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 36.0) internal successors, (1224), 34 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:48,823 INFO L175 Difference]: Start difference. First operand has 206 places, 275 transitions, 3948 flow. Second operand 33 states and 762 transitions. [2023-11-28 20:42:48,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 459 transitions, 7108 flow [2023-11-28 20:42:49,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 459 transitions, 6510 flow, removed 199 selfloop flow, removed 17 redundant places. [2023-11-28 20:42:49,038 INFO L231 Difference]: Finished difference. Result has 232 places, 345 transitions, 5501 flow [2023-11-28 20:42:49,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5501, PETRI_PLACES=232, PETRI_TRANSITIONS=345} [2023-11-28 20:42:49,039 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 194 predicate places. [2023-11-28 20:42:49,039 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 345 transitions, 5501 flow [2023-11-28 20:42:49,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:49,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:49,039 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] [2023-11-28 20:42:49,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:42:49,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 20:42:49,240 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)] === [2023-11-28 20:42:49,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:49,240 INFO L85 PathProgramCache]: Analyzing trace with hash -113326602, now seen corresponding path program 7 times [2023-11-28 20:42:49,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:49,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329461674] [2023-11-28 20:42:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:49,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:49,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329461674] [2023-11-28 20:42:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329461674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816786072] [2023-11-28 20:42:49,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:42:49,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:49,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:49,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:49,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:42:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:49,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:42:49,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:49,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:50,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816786072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:50,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:50,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:42:50,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710026641] [2023-11-28 20:42:50,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:50,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:42:50,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:42:50,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:42:50,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:50,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 345 transitions, 5501 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:50,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:50,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:50,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:51,900 INFO L124 PetriNetUnfolderBase]: 1312/2474 cut-off events. [2023-11-28 20:42:51,900 INFO L125 PetriNetUnfolderBase]: For 37291/37306 co-relation queries the response was YES. [2023-11-28 20:42:51,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18962 conditions, 2474 events. 1312/2474 cut-off events. For 37291/37306 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15305 event pairs, 48 based on Foata normal form. 23/2497 useless extension candidates. Maximal degree in co-relation 18876. Up to 974 conditions per place. [2023-11-28 20:42:51,937 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 237 selfloop transitions, 349 changer transitions 21/613 dead transitions. [2023-11-28 20:42:51,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 613 transitions, 10599 flow [2023-11-28 20:42:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-28 20:42:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-28 20:42:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 707 transitions. [2023-11-28 20:42:51,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137152777777778 [2023-11-28 20:42:51,940 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 707 transitions. [2023-11-28 20:42:51,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 707 transitions. [2023-11-28 20:42:51,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:51,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 707 transitions. [2023-11-28 20:42:51,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 22.09375) internal successors, (707), 32 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:51,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 36.0) internal successors, (1188), 33 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:51,944 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 36.0) internal successors, (1188), 33 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:51,944 INFO L175 Difference]: Start difference. First operand has 232 places, 345 transitions, 5501 flow. Second operand 32 states and 707 transitions. [2023-11-28 20:42:51,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 613 transitions, 10599 flow [2023-11-28 20:42:52,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 613 transitions, 10369 flow, removed 74 selfloop flow, removed 8 redundant places. [2023-11-28 20:42:52,369 INFO L231 Difference]: Finished difference. Result has 268 places, 518 transitions, 9746 flow [2023-11-28 20:42:52,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9746, PETRI_PLACES=268, PETRI_TRANSITIONS=518} [2023-11-28 20:42:52,370 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 230 predicate places. [2023-11-28 20:42:52,371 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 518 transitions, 9746 flow [2023-11-28 20:42:52,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:52,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:52,371 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] [2023-11-28 20:42:52,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:42:52,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:42:52,572 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)] === [2023-11-28 20:42:52,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash -263826888, now seen corresponding path program 8 times [2023-11-28 20:42:52,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:52,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110831924] [2023-11-28 20:42:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:52,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:52,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:52,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110831924] [2023-11-28 20:42:52,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110831924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:52,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082475214] [2023-11-28 20:42:52,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:42:52,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:52,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:52,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:52,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:42:52,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:42:52,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:52,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:42:52,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:53,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:53,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082475214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:53,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:53,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:42:53,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494711033] [2023-11-28 20:42:53,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:53,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:42:53,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:53,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:42:53,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:42:53,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:53,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 518 transitions, 9746 flow. Second operand has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:53,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:53,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:53,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:55,370 INFO L124 PetriNetUnfolderBase]: 1281/2405 cut-off events. [2023-11-28 20:42:55,370 INFO L125 PetriNetUnfolderBase]: For 46927/46939 co-relation queries the response was YES. [2023-11-28 20:42:55,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20972 conditions, 2405 events. 1281/2405 cut-off events. For 46927/46939 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14641 event pairs, 44 based on Foata normal form. 7/2412 useless extension candidates. Maximal degree in co-relation 20867. Up to 1078 conditions per place. [2023-11-28 20:42:55,400 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 249 selfloop transitions, 304 changer transitions 21/580 dead transitions. [2023-11-28 20:42:55,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 580 transitions, 11520 flow [2023-11-28 20:42:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 20:42:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-28 20:42:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 521 transitions. [2023-11-28 20:42:55,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292270531400966 [2023-11-28 20:42:55,402 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 521 transitions. [2023-11-28 20:42:55,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 521 transitions. [2023-11-28 20:42:55,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:55,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 521 transitions. [2023-11-28 20:42:55,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 22.652173913043477) internal successors, (521), 23 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:55,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:55,407 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:55,408 INFO L175 Difference]: Start difference. First operand has 268 places, 518 transitions, 9746 flow. Second operand 23 states and 521 transitions. [2023-11-28 20:42:55,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 580 transitions, 11520 flow [2023-11-28 20:42:56,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 580 transitions, 11354 flow, removed 68 selfloop flow, removed 5 redundant places. [2023-11-28 20:42:56,030 INFO L231 Difference]: Finished difference. Result has 285 places, 509 transitions, 10034 flow [2023-11-28 20:42:56,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=9588, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10034, PETRI_PLACES=285, PETRI_TRANSITIONS=509} [2023-11-28 20:42:56,032 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 247 predicate places. [2023-11-28 20:42:56,032 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 509 transitions, 10034 flow [2023-11-28 20:42:56,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:56,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:56,033 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] [2023-11-28 20:42:56,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:42:56,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:42:56,234 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)] === [2023-11-28 20:42:56,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:56,234 INFO L85 PathProgramCache]: Analyzing trace with hash -684171912, now seen corresponding path program 9 times [2023-11-28 20:42:56,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:56,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721650683] [2023-11-28 20:42:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:56,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:56,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721650683] [2023-11-28 20:42:56,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721650683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:56,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660880647] [2023-11-28 20:42:56,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:42:56,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:56,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:56,510 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:56,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:42:56,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:42:56,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:56,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:42:56,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:56,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:57,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660880647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:57,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:57,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:42:57,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891445386] [2023-11-28 20:42:57,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:57,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:42:57,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:57,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:42:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:42:57,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:42:57,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 509 transitions, 10034 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:57,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:57,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:42:57,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:58,979 INFO L124 PetriNetUnfolderBase]: 1286/2401 cut-off events. [2023-11-28 20:42:58,979 INFO L125 PetriNetUnfolderBase]: For 46732/46745 co-relation queries the response was YES. [2023-11-28 20:42:58,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21494 conditions, 2401 events. 1286/2401 cut-off events. For 46732/46745 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14466 event pairs, 42 based on Foata normal form. 6/2407 useless extension candidates. Maximal degree in co-relation 21388. Up to 1072 conditions per place. [2023-11-28 20:42:59,010 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 238 selfloop transitions, 363 changer transitions 7/614 dead transitions. [2023-11-28 20:42:59,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 614 transitions, 12674 flow [2023-11-28 20:42:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-28 20:42:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-28 20:42:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 638 transitions. [2023-11-28 20:42:59,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-28 20:42:59,012 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 638 transitions. [2023-11-28 20:42:59,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 638 transitions. [2023-11-28 20:42:59,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:59,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 638 transitions. [2023-11-28 20:42:59,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 22.0) internal successors, (638), 29 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:59,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:59,017 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:59,017 INFO L175 Difference]: Start difference. First operand has 285 places, 509 transitions, 10034 flow. Second operand 29 states and 638 transitions. [2023-11-28 20:42:59,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 614 transitions, 12674 flow [2023-11-28 20:42:59,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 614 transitions, 12121 flow, removed 15 selfloop flow, removed 20 redundant places. [2023-11-28 20:42:59,743 INFO L231 Difference]: Finished difference. Result has 297 places, 552 transitions, 11660 flow [2023-11-28 20:42:59,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=9521, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11660, PETRI_PLACES=297, PETRI_TRANSITIONS=552} [2023-11-28 20:42:59,744 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 259 predicate places. [2023-11-28 20:42:59,744 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 552 transitions, 11660 flow [2023-11-28 20:42:59,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:59,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:59,745 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] [2023-11-28 20:42:59,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:42:59,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:42:59,945 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)] === [2023-11-28 20:42:59,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:59,946 INFO L85 PathProgramCache]: Analyzing trace with hash -998535992, now seen corresponding path program 10 times [2023-11-28 20:42:59,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:59,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731037999] [2023-11-28 20:42:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:59,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:00,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731037999] [2023-11-28 20:43:00,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731037999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:00,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255685935] [2023-11-28 20:43:00,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:43:00,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:00,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:00,039 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:00,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:43:00,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:43:00,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:00,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:43:00,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:00,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:00,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255685935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:00,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:00,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-28 20:43:00,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042769773] [2023-11-28 20:43:00,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:00,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:43:00,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:00,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:43:00,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:43:00,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-28 20:43:00,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 552 transitions, 11660 flow. Second operand has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:00,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:00,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-28 20:43:00,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:01,003 INFO L124 PetriNetUnfolderBase]: 1152/2181 cut-off events. [2023-11-28 20:43:01,003 INFO L125 PetriNetUnfolderBase]: For 52526/52545 co-relation queries the response was YES. [2023-11-28 20:43:01,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21225 conditions, 2181 events. 1152/2181 cut-off events. For 52526/52545 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13125 event pairs, 40 based on Foata normal form. 44/2218 useless extension candidates. Maximal degree in co-relation 21114. Up to 1110 conditions per place. [2023-11-28 20:43:01,040 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 319 selfloop transitions, 163 changer transitions 1/553 dead transitions. [2023-11-28 20:43:01,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 553 transitions, 12576 flow [2023-11-28 20:43:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:43:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:43:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2023-11-28 20:43:01,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2023-11-28 20:43:01,042 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 124 transitions. [2023-11-28 20:43:01,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 124 transitions. [2023-11-28 20:43:01,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:01,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 124 transitions. [2023-11-28 20:43:01,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:01,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:01,043 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:01,043 INFO L175 Difference]: Start difference. First operand has 297 places, 552 transitions, 11660 flow. Second operand 5 states and 124 transitions. [2023-11-28 20:43:01,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 553 transitions, 12576 flow [2023-11-28 20:43:01,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 553 transitions, 12221 flow, removed 77 selfloop flow, removed 17 redundant places. [2023-11-28 20:43:01,693 INFO L231 Difference]: Finished difference. Result has 271 places, 531 transitions, 11558 flow [2023-11-28 20:43:01,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=10817, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11558, PETRI_PLACES=271, PETRI_TRANSITIONS=531} [2023-11-28 20:43:01,694 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 233 predicate places. [2023-11-28 20:43:01,694 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 531 transitions, 11558 flow [2023-11-28 20:43:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:01,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:01,694 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] [2023-11-28 20:43:01,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:43:01,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:01,895 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)] === [2023-11-28 20:43:01,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:01,895 INFO L85 PathProgramCache]: Analyzing trace with hash -533069690, now seen corresponding path program 11 times [2023-11-28 20:43:01,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:01,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945627638] [2023-11-28 20:43:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:01,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:02,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:02,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945627638] [2023-11-28 20:43:02,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945627638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:02,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711444369] [2023-11-28 20:43:02,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:43:02,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:02,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:02,164 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:02,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:43:02,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-28 20:43:02,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:02,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:43:02,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:02,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:03,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711444369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:03,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:03,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2023-11-28 20:43:03,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234866086] [2023-11-28 20:43:03,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:03,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:43:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:03,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:43:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:43:03,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:43:03,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 531 transitions, 11558 flow. Second operand has 26 states, 26 states have (on average 18.884615384615383) internal successors, (491), 26 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:03,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:03,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:43:03,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:04,935 INFO L124 PetriNetUnfolderBase]: 1382/2589 cut-off events. [2023-11-28 20:43:04,935 INFO L125 PetriNetUnfolderBase]: For 63135/63143 co-relation queries the response was YES. [2023-11-28 20:43:04,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25316 conditions, 2589 events. 1382/2589 cut-off events. For 63135/63143 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15749 event pairs, 29 based on Foata normal form. 9/2598 useless extension candidates. Maximal degree in co-relation 25209. Up to 975 conditions per place. [2023-11-28 20:43:04,979 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 278 selfloop transitions, 396 changer transitions 21/701 dead transitions. [2023-11-28 20:43:04,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 701 transitions, 15929 flow [2023-11-28 20:43:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-28 20:43:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-28 20:43:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 706 transitions. [2023-11-28 20:43:04,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326164874551972 [2023-11-28 20:43:04,982 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 706 transitions. [2023-11-28 20:43:04,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 706 transitions. [2023-11-28 20:43:04,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:04,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 706 transitions. [2023-11-28 20:43:04,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 22.774193548387096) internal successors, (706), 31 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:04,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 36.0) internal successors, (1152), 32 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:04,987 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 36.0) internal successors, (1152), 32 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:04,987 INFO L175 Difference]: Start difference. First operand has 271 places, 531 transitions, 11558 flow. Second operand 31 states and 706 transitions. [2023-11-28 20:43:04,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 701 transitions, 15929 flow [2023-11-28 20:43:05,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 701 transitions, 15909 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-28 20:43:05,770 INFO L231 Difference]: Finished difference. Result has 315 places, 612 transitions, 15221 flow [2023-11-28 20:43:05,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=11545, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=15221, PETRI_PLACES=315, PETRI_TRANSITIONS=612} [2023-11-28 20:43:05,771 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 277 predicate places. [2023-11-28 20:43:05,771 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 612 transitions, 15221 flow [2023-11-28 20:43:05,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.884615384615383) internal successors, (491), 26 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:05,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:05,772 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] [2023-11-28 20:43:05,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:43:05,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:43:05,973 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)] === [2023-11-28 20:43:05,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:05,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1879188966, now seen corresponding path program 12 times [2023-11-28 20:43:05,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:05,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444950131] [2023-11-28 20:43:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:05,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:06,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:06,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444950131] [2023-11-28 20:43:06,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444950131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:06,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373024482] [2023-11-28 20:43:06,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:43:06,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:06,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:06,207 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:06,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:43:06,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:43:06,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:06,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:43:06,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:06,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:07,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373024482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:07,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:07,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:43:07,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457583662] [2023-11-28 20:43:07,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:07,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:43:07,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:43:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:43:07,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:43:07,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 612 transitions, 15221 flow. Second operand has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:07,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:07,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:43:07,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:08,616 INFO L124 PetriNetUnfolderBase]: 1347/2506 cut-off events. [2023-11-28 20:43:08,616 INFO L125 PetriNetUnfolderBase]: For 71048/71057 co-relation queries the response was YES. [2023-11-28 20:43:08,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26990 conditions, 2506 events. 1347/2506 cut-off events. For 71048/71057 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14916 event pairs, 33 based on Foata normal form. 7/2513 useless extension candidates. Maximal degree in co-relation 26866. Up to 1133 conditions per place. [2023-11-28 20:43:08,655 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 282 selfloop transitions, 350 changer transitions 18/656 dead transitions. [2023-11-28 20:43:08,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 656 transitions, 16926 flow [2023-11-28 20:43:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 20:43:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-28 20:43:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 435 transitions. [2023-11-28 20:43:08,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6359649122807017 [2023-11-28 20:43:08,657 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 435 transitions. [2023-11-28 20:43:08,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 435 transitions. [2023-11-28 20:43:08,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:08,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 435 transitions. [2023-11-28 20:43:08,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 22.894736842105264) internal successors, (435), 19 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:08,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:08,659 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:08,659 INFO L175 Difference]: Start difference. First operand has 315 places, 612 transitions, 15221 flow. Second operand 19 states and 435 transitions. [2023-11-28 20:43:08,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 656 transitions, 16926 flow [2023-11-28 20:43:09,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 656 transitions, 16356 flow, removed 209 selfloop flow, removed 13 redundant places. [2023-11-28 20:43:09,755 INFO L231 Difference]: Finished difference. Result has 320 places, 604 transitions, 15227 flow [2023-11-28 20:43:09,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=14688, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15227, PETRI_PLACES=320, PETRI_TRANSITIONS=604} [2023-11-28 20:43:09,757 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 282 predicate places. [2023-11-28 20:43:09,757 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 604 transitions, 15227 flow [2023-11-28 20:43:09,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:09,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:09,757 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] [2023-11-28 20:43:09,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:43:09,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:43:09,958 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)] === [2023-11-28 20:43:09,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash -294210184, now seen corresponding path program 13 times [2023-11-28 20:43:09,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:09,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141055377] [2023-11-28 20:43:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:09,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:10,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141055377] [2023-11-28 20:43:10,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141055377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937379711] [2023-11-28 20:43:10,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:43:10,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:10,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:10,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:10,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:43:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:10,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:43:10,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:10,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:10,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937379711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:10,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:10,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:43:10,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559077819] [2023-11-28 20:43:10,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:10,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:43:10,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:10,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:43:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:43:10,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:43:10,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 604 transitions, 15227 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:10,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:10,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:43:10,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:12,963 INFO L124 PetriNetUnfolderBase]: 1335/2461 cut-off events. [2023-11-28 20:43:12,963 INFO L125 PetriNetUnfolderBase]: For 65858/65866 co-relation queries the response was YES. [2023-11-28 20:43:12,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26861 conditions, 2461 events. 1335/2461 cut-off events. For 65858/65866 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14349 event pairs, 26 based on Foata normal form. 6/2467 useless extension candidates. Maximal degree in co-relation 26741. Up to 1083 conditions per place. [2023-11-28 20:43:13,045 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 275 selfloop transitions, 397 changer transitions 10/688 dead transitions. [2023-11-28 20:43:13,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 688 transitions, 17566 flow [2023-11-28 20:43:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-28 20:43:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-28 20:43:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 691 transitions. [2023-11-28 20:43:13,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6191756272401434 [2023-11-28 20:43:13,047 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 691 transitions. [2023-11-28 20:43:13,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 691 transitions. [2023-11-28 20:43:13,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:13,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 691 transitions. [2023-11-28 20:43:13,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 22.29032258064516) internal successors, (691), 31 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:13,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 36.0) internal successors, (1152), 32 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:13,051 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 36.0) internal successors, (1152), 32 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:13,051 INFO L175 Difference]: Start difference. First operand has 320 places, 604 transitions, 15227 flow. Second operand 31 states and 691 transitions. [2023-11-28 20:43:13,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 688 transitions, 17566 flow [2023-11-28 20:43:13,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 688 transitions, 17296 flow, removed 15 selfloop flow, removed 14 redundant places. [2023-11-28 20:43:13,893 INFO L231 Difference]: Finished difference. Result has 334 places, 624 transitions, 16687 flow [2023-11-28 20:43:13,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=14972, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=16687, PETRI_PLACES=334, PETRI_TRANSITIONS=624} [2023-11-28 20:43:13,894 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 296 predicate places. [2023-11-28 20:43:13,895 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 624 transitions, 16687 flow [2023-11-28 20:43:13,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:13,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:13,895 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] [2023-11-28 20:43:13,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:43:14,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:14,095 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)] === [2023-11-28 20:43:14,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1863138726, now seen corresponding path program 14 times [2023-11-28 20:43:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:14,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622513882] [2023-11-28 20:43:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:14,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622513882] [2023-11-28 20:43:14,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622513882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497587925] [2023-11-28 20:43:14,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:43:14,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:14,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:14,314 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:14,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:43:14,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:43:14,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:14,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:43:14,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:14,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:15,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497587925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:15,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:15,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-28 20:43:15,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376079698] [2023-11-28 20:43:15,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:15,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:43:15,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:43:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:43:15,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:43:15,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 624 transitions, 16687 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:15,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:15,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:43:15,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:16,634 INFO L124 PetriNetUnfolderBase]: 1335/2447 cut-off events. [2023-11-28 20:43:16,635 INFO L125 PetriNetUnfolderBase]: For 72741/72749 co-relation queries the response was YES. [2023-11-28 20:43:16,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28253 conditions, 2447 events. 1335/2447 cut-off events. For 72741/72749 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14161 event pairs, 31 based on Foata normal form. 5/2452 useless extension candidates. Maximal degree in co-relation 28129. Up to 1363 conditions per place. [2023-11-28 20:43:16,673 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 285 selfloop transitions, 369 changer transitions 4/664 dead transitions. [2023-11-28 20:43:16,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 664 transitions, 18475 flow [2023-11-28 20:43:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 20:43:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-28 20:43:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 425 transitions. [2023-11-28 20:43:16,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6213450292397661 [2023-11-28 20:43:16,675 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 425 transitions. [2023-11-28 20:43:16,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 425 transitions. [2023-11-28 20:43:16,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:16,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 425 transitions. [2023-11-28 20:43:16,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 22.36842105263158) internal successors, (425), 19 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:16,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:16,679 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:16,679 INFO L175 Difference]: Start difference. First operand has 334 places, 624 transitions, 16687 flow. Second operand 19 states and 425 transitions. [2023-11-28 20:43:16,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 664 transitions, 18475 flow [2023-11-28 20:43:17,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 664 transitions, 18289 flow, removed 28 selfloop flow, removed 15 redundant places. [2023-11-28 20:43:17,661 INFO L231 Difference]: Finished difference. Result has 335 places, 627 transitions, 17363 flow [2023-11-28 20:43:17,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=16501, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=17363, PETRI_PLACES=335, PETRI_TRANSITIONS=627} [2023-11-28 20:43:17,663 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 297 predicate places. [2023-11-28 20:43:17,663 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 627 transitions, 17363 flow [2023-11-28 20:43:17,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:17,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:17,664 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] [2023-11-28 20:43:17,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 20:43:17,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:17,864 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)] === [2023-11-28 20:43:17,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1131660079, now seen corresponding path program 15 times [2023-11-28 20:43:17,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:17,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828367807] [2023-11-28 20:43:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:17,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828367807] [2023-11-28 20:43:18,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828367807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:18,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255347339] [2023-11-28 20:43:18,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:43:18,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:18,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:18,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:18,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:43:18,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:43:18,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:18,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:43:18,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:18,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:19,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255347339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:19,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:19,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:43:19,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890407185] [2023-11-28 20:43:19,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:19,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:43:19,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:43:19,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:43:19,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:43:19,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 627 transitions, 17363 flow. Second operand has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:19,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:19,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:43:19,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:23,711 INFO L124 PetriNetUnfolderBase]: 1876/3542 cut-off events. [2023-11-28 20:43:23,711 INFO L125 PetriNetUnfolderBase]: For 119036/119044 co-relation queries the response was YES. [2023-11-28 20:43:23,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43198 conditions, 3542 events. 1876/3542 cut-off events. For 119036/119044 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 22564 event pairs, 67 based on Foata normal form. 12/3554 useless extension candidates. Maximal degree in co-relation 43078. Up to 864 conditions per place. [2023-11-28 20:43:23,767 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 410 selfloop transitions, 582 changer transitions 28/1026 dead transitions. [2023-11-28 20:43:23,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1026 transitions, 28808 flow [2023-11-28 20:43:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-28 20:43:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-28 20:43:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 1418 transitions. [2023-11-28 20:43:23,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6252204585537919 [2023-11-28 20:43:23,771 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 1418 transitions. [2023-11-28 20:43:23,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 1418 transitions. [2023-11-28 20:43:23,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:23,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 1418 transitions. [2023-11-28 20:43:23,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 22.50793650793651) internal successors, (1418), 63 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:23,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 36.0) internal successors, (2304), 64 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:23,780 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 36.0) internal successors, (2304), 64 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:23,780 INFO L175 Difference]: Start difference. First operand has 335 places, 627 transitions, 17363 flow. Second operand 63 states and 1418 transitions. [2023-11-28 20:43:23,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1026 transitions, 28808 flow [2023-11-28 20:43:25,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1026 transitions, 28327 flow, removed 8 selfloop flow, removed 9 redundant places. [2023-11-28 20:43:25,244 INFO L231 Difference]: Finished difference. Result has 409 places, 840 transitions, 26419 flow [2023-11-28 20:43:25,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=17036, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=26419, PETRI_PLACES=409, PETRI_TRANSITIONS=840} [2023-11-28 20:43:25,245 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 371 predicate places. [2023-11-28 20:43:25,245 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 840 transitions, 26419 flow [2023-11-28 20:43:25,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:25,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:25,246 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] [2023-11-28 20:43:25,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:43:25,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:25,446 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)] === [2023-11-28 20:43:25,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1383627147, now seen corresponding path program 16 times [2023-11-28 20:43:25,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:25,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593942183] [2023-11-28 20:43:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:25,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:25,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593942183] [2023-11-28 20:43:25,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593942183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:25,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394938352] [2023-11-28 20:43:25,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:43:25,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:25,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:25,722 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:25,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:43:25,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:43:25,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:25,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:43:25,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:26,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:26,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394938352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:26,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:26,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:43:26,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145766085] [2023-11-28 20:43:26,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:26,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:43:26,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:43:26,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:43:26,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:43:26,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 840 transitions, 26419 flow. Second operand has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:26,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:26,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:43:26,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:32,792 INFO L124 PetriNetUnfolderBase]: 2095/3960 cut-off events. [2023-11-28 20:43:32,793 INFO L125 PetriNetUnfolderBase]: For 153516/153524 co-relation queries the response was YES. [2023-11-28 20:43:32,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52206 conditions, 3960 events. 2095/3960 cut-off events. For 153516/153524 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25927 event pairs, 51 based on Foata normal form. 10/3970 useless extension candidates. Maximal degree in co-relation 52062. Up to 996 conditions per place. [2023-11-28 20:43:32,863 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 377 selfloop transitions, 743 changer transitions 23/1149 dead transitions. [2023-11-28 20:43:32,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1149 transitions, 35254 flow [2023-11-28 20:43:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-28 20:43:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-11-28 20:43:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 1754 transitions. [2023-11-28 20:43:32,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167369901547117 [2023-11-28 20:43:32,868 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 1754 transitions. [2023-11-28 20:43:32,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 1754 transitions. [2023-11-28 20:43:32,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:32,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 1754 transitions. [2023-11-28 20:43:32,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 22.20253164556962) internal successors, (1754), 79 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:32,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 36.0) internal successors, (2880), 80 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:32,879 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 36.0) internal successors, (2880), 80 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:32,879 INFO L175 Difference]: Start difference. First operand has 409 places, 840 transitions, 26419 flow. Second operand 79 states and 1754 transitions. [2023-11-28 20:43:32,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1149 transitions, 35254 flow [2023-11-28 20:43:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1149 transitions, 33464 flow, removed 539 selfloop flow, removed 14 redundant places. [2023-11-28 20:43:35,507 INFO L231 Difference]: Finished difference. Result has 486 places, 969 transitions, 31683 flow [2023-11-28 20:43:35,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=25147, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=621, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=31683, PETRI_PLACES=486, PETRI_TRANSITIONS=969} [2023-11-28 20:43:35,509 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 448 predicate places. [2023-11-28 20:43:35,509 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 969 transitions, 31683 flow [2023-11-28 20:43:35,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:35,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:35,510 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] [2023-11-28 20:43:35,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:43:35,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:35,711 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:43:35,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:35,711 INFO L85 PathProgramCache]: Analyzing trace with hash 861821809, now seen corresponding path program 17 times [2023-11-28 20:43:35,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:35,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331888982] [2023-11-28 20:43:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:35,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:35,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:35,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331888982] [2023-11-28 20:43:35,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331888982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:35,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008986878] [2023-11-28 20:43:35,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:43:35,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:35,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:35,999 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:36,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:43:36,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-28 20:43:36,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:36,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:43:36,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:36,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:36,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008986878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:36,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:36,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2023-11-28 20:43:36,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309305031] [2023-11-28 20:43:36,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:36,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-28 20:43:36,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-28 20:43:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 20:43:36,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:43:36,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 969 transitions, 31683 flow. Second operand has 36 states, 36 states have (on average 18.583333333333332) internal successors, (669), 36 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:36,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:36,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:43:36,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:42,912 INFO L124 PetriNetUnfolderBase]: 2613/4942 cut-off events. [2023-11-28 20:43:42,912 INFO L125 PetriNetUnfolderBase]: For 202602/202623 co-relation queries the response was YES. [2023-11-28 20:43:42,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66504 conditions, 4942 events. 2613/4942 cut-off events. For 202602/202623 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 33802 event pairs, 53 based on Foata normal form. 25/4967 useless extension candidates. Maximal degree in co-relation 66348. Up to 1230 conditions per place. [2023-11-28 20:43:43,009 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 471 selfloop transitions, 970 changer transitions 18/1465 dead transitions. [2023-11-28 20:43:43,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1465 transitions, 48310 flow [2023-11-28 20:43:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-28 20:43:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-11-28 20:43:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 1769 transitions. [2023-11-28 20:43:43,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142361111111111 [2023-11-28 20:43:43,012 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 1769 transitions. [2023-11-28 20:43:43,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 1769 transitions. [2023-11-28 20:43:43,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:43,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 1769 transitions. [2023-11-28 20:43:43,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 22.1125) internal successors, (1769), 80 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 36.0) internal successors, (2916), 81 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,019 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 36.0) internal successors, (2916), 81 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,019 INFO L175 Difference]: Start difference. First operand has 486 places, 969 transitions, 31683 flow. Second operand 80 states and 1769 transitions. [2023-11-28 20:43:43,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1465 transitions, 48310 flow [2023-11-28 20:43:47,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 1465 transitions, 47196 flow, removed 254 selfloop flow, removed 32 redundant places. [2023-11-28 20:43:47,423 INFO L231 Difference]: Finished difference. Result has 565 places, 1245 transitions, 44332 flow [2023-11-28 20:43:47,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=30777, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=44332, PETRI_PLACES=565, PETRI_TRANSITIONS=1245} [2023-11-28 20:43:47,424 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 527 predicate places. [2023-11-28 20:43:47,424 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 1245 transitions, 44332 flow [2023-11-28 20:43:47,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 18.583333333333332) internal successors, (669), 36 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:47,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:47,425 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] [2023-11-28 20:43:47,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 20:43:47,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:47,625 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:43:47,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:47,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1583722053, now seen corresponding path program 18 times [2023-11-28 20:43:47,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:47,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268226417] [2023-11-28 20:43:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:47,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:47,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:47,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268226417] [2023-11-28 20:43:47,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268226417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:47,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391922939] [2023-11-28 20:43:47,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:43:47,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:47,984 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:47,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:43:48,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:43:48,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:48,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:43:48,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:48,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:48,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391922939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:48,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:48,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:43:48,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835233580] [2023-11-28 20:43:48,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:48,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:43:48,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:43:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:43:48,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:43:48,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1245 transitions, 44332 flow. Second operand has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:48,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:48,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:43:48,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:58,005 INFO L124 PetriNetUnfolderBase]: 2775/5241 cut-off events. [2023-11-28 20:43:58,005 INFO L125 PetriNetUnfolderBase]: For 259790/259810 co-relation queries the response was YES. [2023-11-28 20:43:58,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75841 conditions, 5241 events. 2775/5241 cut-off events. For 259790/259810 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 36234 event pairs, 56 based on Foata normal form. 20/5261 useless extension candidates. Maximal degree in co-relation 75654. Up to 1308 conditions per place. [2023-11-28 20:43:58,119 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 504 selfloop transitions, 1028 changer transitions 27/1565 dead transitions. [2023-11-28 20:43:58,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 1565 transitions, 54091 flow [2023-11-28 20:43:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-11-28 20:43:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2023-11-28 20:43:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 2429 transitions. [2023-11-28 20:43:58,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078578578578578 [2023-11-28 20:43:58,122 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 2429 transitions. [2023-11-28 20:43:58,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 2429 transitions. [2023-11-28 20:43:58,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:58,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 2429 transitions. [2023-11-28 20:43:58,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 21.882882882882882) internal successors, (2429), 111 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:58,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 36.0) internal successors, (4032), 112 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:58,132 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 36.0) internal successors, (4032), 112 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:58,132 INFO L175 Difference]: Start difference. First operand has 565 places, 1245 transitions, 44332 flow. Second operand 111 states and 2429 transitions. [2023-11-28 20:43:58,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 1565 transitions, 54091 flow [2023-11-28 20:44:04,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1565 transitions, 51166 flow, removed 1153 selfloop flow, removed 25 redundant places. [2023-11-28 20:44:04,972 INFO L231 Difference]: Finished difference. Result has 663 places, 1340 transitions, 48852 flow [2023-11-28 20:44:04,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=42376, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=935, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=48852, PETRI_PLACES=663, PETRI_TRANSITIONS=1340} [2023-11-28 20:44:04,973 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 625 predicate places. [2023-11-28 20:44:04,973 INFO L495 AbstractCegarLoop]: Abstraction has has 663 places, 1340 transitions, 48852 flow [2023-11-28 20:44:04,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:04,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:04,974 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] [2023-11-28 20:44:04,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 20:44:05,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:05,174 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:44:05,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1916612687, now seen corresponding path program 19 times [2023-11-28 20:44:05,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:05,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435858938] [2023-11-28 20:44:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:05,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:05,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:05,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435858938] [2023-11-28 20:44:05,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435858938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:05,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112807159] [2023-11-28 20:44:05,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:44:05,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:05,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:05,427 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:05,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:44:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:05,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:44:05,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:05,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:06,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112807159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:06,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:06,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:44:06,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574289632] [2023-11-28 20:44:06,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:06,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:44:06,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:44:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:44:06,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:44:06,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 1340 transitions, 48852 flow. Second operand has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:06,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:06,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:44:06,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:12,614 INFO L124 PetriNetUnfolderBase]: 2842/5353 cut-off events. [2023-11-28 20:44:12,614 INFO L125 PetriNetUnfolderBase]: For 243954/243977 co-relation queries the response was YES. [2023-11-28 20:44:12,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76709 conditions, 5353 events. 2842/5353 cut-off events. For 243954/243977 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 37044 event pairs, 66 based on Foata normal form. 14/5367 useless extension candidates. Maximal degree in co-relation 76538. Up to 2967 conditions per place. [2023-11-28 20:44:12,748 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 577 selfloop transitions, 876 changer transitions 11/1470 dead transitions. [2023-11-28 20:44:12,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 1470 transitions, 54339 flow [2023-11-28 20:44:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-28 20:44:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-28 20:44:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 1117 transitions. [2023-11-28 20:44:12,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854297693920335 [2023-11-28 20:44:12,751 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 1117 transitions. [2023-11-28 20:44:12,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 1117 transitions. [2023-11-28 20:44:12,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:12,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 1117 transitions. [2023-11-28 20:44:12,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 21.07547169811321) internal successors, (1117), 53 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:12,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 36.0) internal successors, (1944), 54 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:12,757 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 36.0) internal successors, (1944), 54 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:12,757 INFO L175 Difference]: Start difference. First operand has 663 places, 1340 transitions, 48852 flow. Second operand 53 states and 1117 transitions. [2023-11-28 20:44:12,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 1470 transitions, 54339 flow [2023-11-28 20:44:19,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 1470 transitions, 52986 flow, removed 300 selfloop flow, removed 61 redundant places. [2023-11-28 20:44:19,181 INFO L231 Difference]: Finished difference. Result has 660 places, 1390 transitions, 52053 flow [2023-11-28 20:44:19,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=47540, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=830, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=52053, PETRI_PLACES=660, PETRI_TRANSITIONS=1390} [2023-11-28 20:44:19,183 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 622 predicate places. [2023-11-28 20:44:19,183 INFO L495 AbstractCegarLoop]: Abstraction has has 660 places, 1390 transitions, 52053 flow [2023-11-28 20:44:19,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:19,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:19,184 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] [2023-11-28 20:44:19,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-28 20:44:19,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-28 20:44:19,384 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:44:19,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:19,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1014657043, now seen corresponding path program 20 times [2023-11-28 20:44:19,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:19,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326269497] [2023-11-28 20:44:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:19,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:19,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:19,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326269497] [2023-11-28 20:44:19,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326269497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:19,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419547510] [2023-11-28 20:44:19,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:44:19,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:19,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:19,680 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:19,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 20:44:19,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:44:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:19,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:44:19,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:20,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:20,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419547510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:20,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:20,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:44:20,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618785993] [2023-11-28 20:44:20,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:20,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:44:20,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:44:20,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:44:20,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:44:20,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 1390 transitions, 52053 flow. Second operand has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:20,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:20,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:44:20,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:29,118 INFO L124 PetriNetUnfolderBase]: 3226/6098 cut-off events. [2023-11-28 20:44:29,118 INFO L125 PetriNetUnfolderBase]: For 298071/298105 co-relation queries the response was YES. [2023-11-28 20:44:29,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89964 conditions, 6098 events. 3226/6098 cut-off events. For 298071/298105 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43721 event pairs, 84 based on Foata normal form. 19/6117 useless extension candidates. Maximal degree in co-relation 89771. Up to 2520 conditions per place. [2023-11-28 20:44:29,261 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 662 selfloop transitions, 1027 changer transitions 23/1718 dead transitions. [2023-11-28 20:44:29,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 1718 transitions, 64478 flow [2023-11-28 20:44:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-28 20:44:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-11-28 20:44:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 1542 transitions. [2023-11-28 20:44:29,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611904761904762 [2023-11-28 20:44:29,265 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 1542 transitions. [2023-11-28 20:44:29,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 1542 transitions. [2023-11-28 20:44:29,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:29,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 1542 transitions. [2023-11-28 20:44:29,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 22.02857142857143) internal successors, (1542), 70 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:29,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 36.0) internal successors, (2556), 71 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:29,271 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 36.0) internal successors, (2556), 71 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:29,271 INFO L175 Difference]: Start difference. First operand has 660 places, 1390 transitions, 52053 flow. Second operand 70 states and 1542 transitions. [2023-11-28 20:44:29,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 1718 transitions, 64478 flow [2023-11-28 20:44:37,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 1718 transitions, 63691 flow, removed 87 selfloop flow, removed 19 redundant places. [2023-11-28 20:44:37,598 INFO L231 Difference]: Finished difference. Result has 742 places, 1568 transitions, 62813 flow [2023-11-28 20:44:37,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=51359, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=850, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=62813, PETRI_PLACES=742, PETRI_TRANSITIONS=1568} [2023-11-28 20:44:37,599 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 704 predicate places. [2023-11-28 20:44:37,599 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 1568 transitions, 62813 flow [2023-11-28 20:44:37,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:37,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:37,600 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] [2023-11-28 20:44:37,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 20:44:37,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-28 20:44:37,800 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:44:37,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:37,801 INFO L85 PathProgramCache]: Analyzing trace with hash 736925091, now seen corresponding path program 21 times [2023-11-28 20:44:37,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:37,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911674285] [2023-11-28 20:44:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:37,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:38,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:38,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911674285] [2023-11-28 20:44:38,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911674285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:38,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803865934] [2023-11-28 20:44:38,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:44:38,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:38,094 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:38,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 20:44:38,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:44:38,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:38,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:44:38,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:38,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:39,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803865934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:39,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:39,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 34 [2023-11-28 20:44:39,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811518126] [2023-11-28 20:44:39,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-28 20:44:39,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-28 20:44:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:44:39,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:44:39,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 1568 transitions, 62813 flow. Second operand has 35 states, 35 states have (on average 18.65714285714286) internal successors, (653), 35 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:39,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:39,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:44:39,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:51,356 INFO L124 PetriNetUnfolderBase]: 3580/6856 cut-off events. [2023-11-28 20:44:51,356 INFO L125 PetriNetUnfolderBase]: For 402446/402484 co-relation queries the response was YES. [2023-11-28 20:44:51,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106691 conditions, 6856 events. 3580/6856 cut-off events. For 402446/402484 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 51395 event pairs, 50 based on Foata normal form. 40/6896 useless extension candidates. Maximal degree in co-relation 106465. Up to 1776 conditions per place. [2023-11-28 20:44:51,635 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 577 selfloop transitions, 1433 changer transitions 28/2044 dead transitions. [2023-11-28 20:44:51,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 870 places, 2044 transitions, 78874 flow [2023-11-28 20:44:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-11-28 20:44:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2023-11-28 20:44:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 2840 transitions. [2023-11-28 20:44:51,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5931495405179615 [2023-11-28 20:44:51,642 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 2840 transitions. [2023-11-28 20:44:51,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 2840 transitions. [2023-11-28 20:44:51,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:51,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 2840 transitions. [2023-11-28 20:44:51,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 21.353383458646615) internal successors, (2840), 133 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:51,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 36.0) internal successors, (4824), 134 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:51,663 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 36.0) internal successors, (4824), 134 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:51,663 INFO L175 Difference]: Start difference. First operand has 742 places, 1568 transitions, 62813 flow. Second operand 133 states and 2840 transitions. [2023-11-28 20:44:51,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 870 places, 2044 transitions, 78874 flow [2023-11-28 20:45:03,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 850 places, 2044 transitions, 78401 flow, removed 127 selfloop flow, removed 20 redundant places. [2023-11-28 20:45:03,399 INFO L231 Difference]: Finished difference. Result has 877 places, 1804 transitions, 77082 flow [2023-11-28 20:45:03,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=62519, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=77082, PETRI_PLACES=877, PETRI_TRANSITIONS=1804} [2023-11-28 20:45:03,401 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 839 predicate places. [2023-11-28 20:45:03,401 INFO L495 AbstractCegarLoop]: Abstraction has has 877 places, 1804 transitions, 77082 flow [2023-11-28 20:45:03,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 18.65714285714286) internal successors, (653), 35 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:03,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:45:03,402 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] [2023-11-28 20:45:03,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 20:45:03,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-28 20:45:03,602 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:45:03,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash 15024847, now seen corresponding path program 22 times [2023-11-28 20:45:03,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:03,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35953990] [2023-11-28 20:45:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:03,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:03,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:03,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35953990] [2023-11-28 20:45:03,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35953990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:03,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687289890] [2023-11-28 20:45:03,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:45:03,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:03,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:03,862 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:03,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 20:45:03,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:45:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:03,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:45:03,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:04,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:04,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687289890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:04,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:04,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:45:04,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992408272] [2023-11-28 20:45:04,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:04,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:45:04,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:45:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:45:04,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:45:04,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 877 places, 1804 transitions, 77082 flow. Second operand has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:04,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:45:04,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:45:04,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:45:16,414 INFO L124 PetriNetUnfolderBase]: 3682/7083 cut-off events. [2023-11-28 20:45:16,415 INFO L125 PetriNetUnfolderBase]: For 465245/465281 co-relation queries the response was YES. [2023-11-28 20:45:16,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116141 conditions, 7083 events. 3682/7083 cut-off events. For 465245/465281 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53516 event pairs, 91 based on Foata normal form. 21/7104 useless extension candidates. Maximal degree in co-relation 115893. Up to 2553 conditions per place. [2023-11-28 20:45:16,700 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 671 selfloop transitions, 1336 changer transitions 19/2032 dead transitions. [2023-11-28 20:45:16,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 2032 transitions, 86356 flow [2023-11-28 20:45:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-28 20:45:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-11-28 20:45:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 1746 transitions. [2023-11-28 20:45:16,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139240506329114 [2023-11-28 20:45:16,703 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 1746 transitions. [2023-11-28 20:45:16,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 1746 transitions. [2023-11-28 20:45:16,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:45:16,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 1746 transitions. [2023-11-28 20:45:16,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 22.10126582278481) internal successors, (1746), 79 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:16,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 36.0) internal successors, (2880), 80 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:16,709 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 36.0) internal successors, (2880), 80 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:16,709 INFO L175 Difference]: Start difference. First operand has 877 places, 1804 transitions, 77082 flow. Second operand 79 states and 1746 transitions. [2023-11-28 20:45:16,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 2032 transitions, 86356 flow [2023-11-28 20:45:31,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 889 places, 2032 transitions, 83088 flow, removed 1268 selfloop flow, removed 59 redundant places. [2023-11-28 20:45:31,089 INFO L231 Difference]: Finished difference. Result has 898 places, 1873 transitions, 81555 flow [2023-11-28 20:45:31,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74198, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=81555, PETRI_PLACES=898, PETRI_TRANSITIONS=1873} [2023-11-28 20:45:31,091 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 860 predicate places. [2023-11-28 20:45:31,092 INFO L495 AbstractCegarLoop]: Abstraction has has 898 places, 1873 transitions, 81555 flow [2023-11-28 20:45:31,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:31,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:45:31,092 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] [2023-11-28 20:45:31,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-28 20:45:31,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 20:45:31,293 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:45:31,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1528693335, now seen corresponding path program 23 times [2023-11-28 20:45:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:31,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662444946] [2023-11-28 20:45:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:31,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:31,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662444946] [2023-11-28 20:45:31,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662444946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:31,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065225518] [2023-11-28 20:45:31,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:45:31,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:31,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:31,487 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:31,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-28 20:45:31,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-28 20:45:31,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:31,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:45:31,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:31,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:32,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065225518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:32,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:32,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2023-11-28 20:45:32,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122151206] [2023-11-28 20:45:32,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:32,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-28 20:45:32,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:32,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-28 20:45:32,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 20:45:32,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:45:32,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 898 places, 1873 transitions, 81555 flow. Second operand has 36 states, 36 states have (on average 18.583333333333332) internal successors, (669), 36 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:32,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:45:32,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:45:32,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:45:43,163 INFO L124 PetriNetUnfolderBase]: 3821/7320 cut-off events. [2023-11-28 20:45:43,163 INFO L125 PetriNetUnfolderBase]: For 474201/474234 co-relation queries the response was YES. [2023-11-28 20:45:43,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121929 conditions, 7320 events. 3821/7320 cut-off events. For 474201/474234 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 55517 event pairs, 114 based on Foata normal form. 20/7340 useless extension candidates. Maximal degree in co-relation 121679. Up to 3607 conditions per place. [2023-11-28 20:45:43,419 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 764 selfloop transitions, 1286 changer transitions 12/2068 dead transitions. [2023-11-28 20:45:43,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 937 places, 2068 transitions, 90734 flow [2023-11-28 20:45:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-28 20:45:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-28 20:45:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1017 transitions. [2023-11-28 20:45:43,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2023-11-28 20:45:43,422 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1017 transitions. [2023-11-28 20:45:43,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1017 transitions. [2023-11-28 20:45:43,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:45:43,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1017 transitions. [2023-11-28 20:45:43,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 22.108695652173914) internal successors, (1017), 46 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:43,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:43,427 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:43,427 INFO L175 Difference]: Start difference. First operand has 898 places, 1873 transitions, 81555 flow. Second operand 46 states and 1017 transitions. [2023-11-28 20:45:43,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 937 places, 2068 transitions, 90734 flow [2023-11-28 20:45:59,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 884 places, 2068 transitions, 89853 flow, removed 140 selfloop flow, removed 53 redundant places. [2023-11-28 20:45:59,809 INFO L231 Difference]: Finished difference. Result has 899 places, 1946 transitions, 88556 flow [2023-11-28 20:45:59,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=80740, PETRI_DIFFERENCE_MINUEND_PLACES=839, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=88556, PETRI_PLACES=899, PETRI_TRANSITIONS=1946} [2023-11-28 20:45:59,811 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 861 predicate places. [2023-11-28 20:45:59,811 INFO L495 AbstractCegarLoop]: Abstraction has has 899 places, 1946 transitions, 88556 flow [2023-11-28 20:45:59,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 18.583333333333332) internal successors, (669), 36 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:59,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:45:59,812 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] [2023-11-28 20:45:59,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-28 20:46:00,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 20:46:00,012 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:46:00,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2039979549, now seen corresponding path program 24 times [2023-11-28 20:46:00,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:46:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356667882] [2023-11-28 20:46:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:46:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:00,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:46:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356667882] [2023-11-28 20:46:00,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356667882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:46:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699011148] [2023-11-28 20:46:00,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:46:00,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:00,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:46:00,266 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:46:00,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-28 20:46:00,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:46:00,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:46:00,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:46:00,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:00,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:46:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:01,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699011148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:46:01,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:46:01,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:46:01,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433628845] [2023-11-28 20:46:01,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:01,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:46:01,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:46:01,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:46:01,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:46:01,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:46:01,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 899 places, 1946 transitions, 88556 flow. Second operand has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:01,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:46:01,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:46:01,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:46:14,727 INFO L124 PetriNetUnfolderBase]: 4246/8182 cut-off events. [2023-11-28 20:46:14,728 INFO L125 PetriNetUnfolderBase]: For 582800/582839 co-relation queries the response was YES. [2023-11-28 20:46:14,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139573 conditions, 8182 events. 4246/8182 cut-off events. For 582800/582839 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 63740 event pairs, 101 based on Foata normal form. 35/8217 useless extension candidates. Maximal degree in co-relation 139319. Up to 3308 conditions per place. [2023-11-28 20:46:14,939 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 865 selfloop transitions, 1429 changer transitions 37/2337 dead transitions. [2023-11-28 20:46:14,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 983 places, 2337 transitions, 104184 flow [2023-11-28 20:46:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-28 20:46:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-11-28 20:46:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 1899 transitions. [2023-11-28 20:46:14,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063218390804598 [2023-11-28 20:46:14,943 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 1899 transitions. [2023-11-28 20:46:14,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 1899 transitions. [2023-11-28 20:46:14,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:46:14,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 1899 transitions. [2023-11-28 20:46:14,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 21.82758620689655) internal successors, (1899), 87 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:14,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 36.0) internal successors, (3168), 88 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:14,949 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 36.0) internal successors, (3168), 88 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:14,949 INFO L175 Difference]: Start difference. First operand has 899 places, 1946 transitions, 88556 flow. Second operand 87 states and 1899 transitions. [2023-11-28 20:46:14,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 983 places, 2337 transitions, 104184 flow [2023-11-28 20:46:34,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 971 places, 2337 transitions, 103831 flow, removed 122 selfloop flow, removed 12 redundant places. [2023-11-28 20:46:34,769 INFO L231 Difference]: Finished difference. Result has 994 places, 2152 transitions, 101876 flow [2023-11-28 20:46:34,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=88085, PETRI_DIFFERENCE_MINUEND_PLACES=885, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=101876, PETRI_PLACES=994, PETRI_TRANSITIONS=2152} [2023-11-28 20:46:34,771 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 956 predicate places. [2023-11-28 20:46:34,772 INFO L495 AbstractCegarLoop]: Abstraction has has 994 places, 2152 transitions, 101876 flow [2023-11-28 20:46:34,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:34,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:46:34,772 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] [2023-11-28 20:46:34,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-28 20:46:34,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:34,972 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:46:34,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:34,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1533087503, now seen corresponding path program 25 times [2023-11-28 20:46:34,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:46:34,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464111881] [2023-11-28 20:46:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:34,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:46:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:46:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464111881] [2023-11-28 20:46:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464111881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:46:35,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328555819] [2023-11-28 20:46:35,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:46:35,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:46:35,197 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:46:35,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-28 20:46:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:35,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:46:35,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:35,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:46:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:36,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328555819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:46:36,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:46:36,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:46:36,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921757250] [2023-11-28 20:46:36,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:36,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:46:36,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:46:36,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:46:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:46:36,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:46:36,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 2152 transitions, 101876 flow. Second operand has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:36,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:46:36,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:46:36,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:46:50,239 INFO L124 PetriNetUnfolderBase]: 4237/8163 cut-off events. [2023-11-28 20:46:50,239 INFO L125 PetriNetUnfolderBase]: For 651596/651632 co-relation queries the response was YES. [2023-11-28 20:46:50,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146408 conditions, 8163 events. 4237/8163 cut-off events. For 651596/651632 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 63515 event pairs, 101 based on Foata normal form. 17/8180 useless extension candidates. Maximal degree in co-relation 146134. Up to 3423 conditions per place. [2023-11-28 20:46:50,467 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 767 selfloop transitions, 1524 changer transitions 32/2329 dead transitions. [2023-11-28 20:46:50,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1066 places, 2329 transitions, 109644 flow [2023-11-28 20:46:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-28 20:46:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-11-28 20:46:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 1706 transitions. [2023-11-28 20:46:50,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075498575498576 [2023-11-28 20:46:50,470 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 1706 transitions. [2023-11-28 20:46:50,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 1706 transitions. [2023-11-28 20:46:50,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:46:50,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 1706 transitions. [2023-11-28 20:46:50,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 21.871794871794872) internal successors, (1706), 78 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:50,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 36.0) internal successors, (2844), 79 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:50,475 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 36.0) internal successors, (2844), 79 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:50,475 INFO L175 Difference]: Start difference. First operand has 994 places, 2152 transitions, 101876 flow. Second operand 78 states and 1706 transitions. [2023-11-28 20:46:50,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1066 places, 2329 transitions, 109644 flow [2023-11-28 20:47:12,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1007 places, 2329 transitions, 108259 flow, removed 262 selfloop flow, removed 59 redundant places. [2023-11-28 20:47:12,378 INFO L231 Difference]: Finished difference. Result has 1014 places, 2167 transitions, 104911 flow [2023-11-28 20:47:12,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=100552, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=104911, PETRI_PLACES=1014, PETRI_TRANSITIONS=2167} [2023-11-28 20:47:12,380 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 976 predicate places. [2023-11-28 20:47:12,381 INFO L495 AbstractCegarLoop]: Abstraction has has 1014 places, 2167 transitions, 104911 flow [2023-11-28 20:47:12,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:12,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:47:12,381 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] [2023-11-28 20:47:12,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-28 20:47:12,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:12,581 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:47:12,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:47:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1708332057, now seen corresponding path program 26 times [2023-11-28 20:47:12,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:47:12,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643698745] [2023-11-28 20:47:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:47:12,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:47:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:47:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:12,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:47:12,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643698745] [2023-11-28 20:47:12,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643698745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:47:12,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676552444] [2023-11-28 20:47:12,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:47:12,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:12,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:47:12,822 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:47:12,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-28 20:47:12,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:47:12,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:47:12,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:47:12,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:47:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:13,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:47:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:13,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676552444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:47:13,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:47:13,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:47:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242210629] [2023-11-28 20:47:13,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:47:13,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:47:13,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:47:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:47:13,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:47:13,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:47:13,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1014 places, 2167 transitions, 104911 flow. Second operand has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:13,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:47:13,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:47:13,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:47:29,797 INFO L124 PetriNetUnfolderBase]: 4642/8922 cut-off events. [2023-11-28 20:47:29,798 INFO L125 PetriNetUnfolderBase]: For 755608/755654 co-relation queries the response was YES. [2023-11-28 20:47:29,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164678 conditions, 8922 events. 4642/8922 cut-off events. For 755608/755654 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 70442 event pairs, 104 based on Foata normal form. 22/8944 useless extension candidates. Maximal degree in co-relation 164404. Up to 4240 conditions per place. [2023-11-28 20:47:30,096 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 1030 selfloop transitions, 1460 changer transitions 23/2519 dead transitions. [2023-11-28 20:47:30,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1074 places, 2519 transitions, 122829 flow [2023-11-28 20:47:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-28 20:47:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-28 20:47:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1494 transitions. [2023-11-28 20:47:30,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194029850746269 [2023-11-28 20:47:30,099 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 1494 transitions. [2023-11-28 20:47:30,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 1494 transitions. [2023-11-28 20:47:30,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:47:30,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 1494 transitions. [2023-11-28 20:47:30,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 22.29850746268657) internal successors, (1494), 67 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:30,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 36.0) internal successors, (2448), 68 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:30,106 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 36.0) internal successors, (2448), 68 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:30,106 INFO L175 Difference]: Start difference. First operand has 1014 places, 2167 transitions, 104911 flow. Second operand 67 states and 1494 transitions. [2023-11-28 20:47:30,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1074 places, 2519 transitions, 122829 flow [2023-11-28 20:47:55,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1023 places, 2519 transitions, 121851 flow, removed 133 selfloop flow, removed 51 redundant places. [2023-11-28 20:47:55,904 INFO L231 Difference]: Finished difference. Result has 1055 places, 2371 transitions, 120819 flow [2023-11-28 20:47:55,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=104005, PETRI_DIFFERENCE_MINUEND_PLACES=957, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=120819, PETRI_PLACES=1055, PETRI_TRANSITIONS=2371} [2023-11-28 20:47:55,906 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1017 predicate places. [2023-11-28 20:47:55,906 INFO L495 AbstractCegarLoop]: Abstraction has has 1055 places, 2371 transitions, 120819 flow [2023-11-28 20:47:55,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:55,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:47:55,906 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] [2023-11-28 20:47:55,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-28 20:47:56,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:56,107 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:47:56,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:47:56,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1717494891, now seen corresponding path program 27 times [2023-11-28 20:47:56,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:47:56,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985659449] [2023-11-28 20:47:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:47:56,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:47:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:47:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:56,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:47:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985659449] [2023-11-28 20:47:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985659449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:47:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630330756] [2023-11-28 20:47:56,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:47:56,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:56,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:47:56,340 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:47:56,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-28 20:47:56,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:47:56,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:47:56,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:47:56,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:47:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:56,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:47:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:57,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630330756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:47:57,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:47:57,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:47:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459546873] [2023-11-28 20:47:57,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:47:57,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:47:57,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:47:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:47:57,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:47:57,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:47:57,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1055 places, 2371 transitions, 120819 flow. Second operand has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:57,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:47:57,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:47:57,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:48:16,684 INFO L124 PetriNetUnfolderBase]: 5039/9759 cut-off events. [2023-11-28 20:48:16,684 INFO L125 PetriNetUnfolderBase]: For 955924/955974 co-relation queries the response was YES. [2023-11-28 20:48:16,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187928 conditions, 9759 events. 5039/9759 cut-off events. For 955924/955974 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 79077 event pairs, 119 based on Foata normal form. 33/9792 useless extension candidates. Maximal degree in co-relation 187623. Up to 4147 conditions per place. [2023-11-28 20:48:16,988 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 1008 selfloop transitions, 1691 changer transitions 31/2736 dead transitions. [2023-11-28 20:48:16,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 2736 transitions, 139842 flow [2023-11-28 20:48:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-28 20:48:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-28 20:48:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 1790 transitions. [2023-11-28 20:48:16,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138545953360768 [2023-11-28 20:48:16,990 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 1790 transitions. [2023-11-28 20:48:16,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 1790 transitions. [2023-11-28 20:48:16,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:48:16,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 1790 transitions. [2023-11-28 20:48:16,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 22.098765432098766) internal successors, (1790), 81 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:48:16,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 36.0) internal successors, (2952), 82 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:48:16,996 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 36.0) internal successors, (2952), 82 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:48:16,996 INFO L175 Difference]: Start difference. First operand has 1055 places, 2371 transitions, 120819 flow. Second operand 81 states and 1790 transitions. [2023-11-28 20:48:16,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 2736 transitions, 139842 flow [2023-11-28 20:48:51,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1109 places, 2736 transitions, 139498 flow, removed 85 selfloop flow, removed 22 redundant places. [2023-11-28 20:48:51,679 INFO L231 Difference]: Finished difference. Result has 1137 places, 2553 transitions, 137229 flow [2023-11-28 20:48:51,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=120543, PETRI_DIFFERENCE_MINUEND_PLACES=1029, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=137229, PETRI_PLACES=1137, PETRI_TRANSITIONS=2553} [2023-11-28 20:48:51,681 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1099 predicate places. [2023-11-28 20:48:51,681 INFO L495 AbstractCegarLoop]: Abstraction has has 1137 places, 2553 transitions, 137229 flow [2023-11-28 20:48:51,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:48:51,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:48:51,681 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] [2023-11-28 20:48:51,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-28 20:48:51,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-28 20:48:51,882 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:48:51,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:48:51,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1823283463, now seen corresponding path program 28 times [2023-11-28 20:48:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:48:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619320123] [2023-11-28 20:48:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:48:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:48:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:48:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:48:52,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:48:52,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619320123] [2023-11-28 20:48:52,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619320123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:48:52,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772434517] [2023-11-28 20:48:52,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:48:52,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:48:52,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:48:52,103 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:48:52,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-28 20:48:52,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:48:52,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:48:52,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:48:52,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:48:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:48:52,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:48:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:48:53,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772434517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:48:53,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:48:53,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:48:53,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437998831] [2023-11-28 20:48:53,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:48:53,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:48:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:48:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:48:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:48:53,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:48:53,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1137 places, 2553 transitions, 137229 flow. Second operand has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:48:53,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:48:53,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:48:53,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:49:17,572 INFO L124 PetriNetUnfolderBase]: 5312/10322 cut-off events. [2023-11-28 20:49:17,573 INFO L125 PetriNetUnfolderBase]: For 1140855/1140907 co-relation queries the response was YES. [2023-11-28 20:49:17,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209362 conditions, 10322 events. 5312/10322 cut-off events. For 1140855/1140907 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 84964 event pairs, 131 based on Foata normal form. 24/10346 useless extension candidates. Maximal degree in co-relation 209032. Up to 4512 conditions per place. [2023-11-28 20:49:17,910 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 1070 selfloop transitions, 1790 changer transitions 26/2892 dead transitions. [2023-11-28 20:49:17,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1226 places, 2892 transitions, 154906 flow [2023-11-28 20:49:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-28 20:49:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-11-28 20:49:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 2059 transitions. [2023-11-28 20:49:17,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608451536643026 [2023-11-28 20:49:17,913 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 2059 transitions. [2023-11-28 20:49:17,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 2059 transitions. [2023-11-28 20:49:17,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:49:17,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 2059 transitions. [2023-11-28 20:49:17,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 21.904255319148938) internal successors, (2059), 94 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:49:17,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 36.0) internal successors, (3420), 95 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:49:17,919 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 36.0) internal successors, (3420), 95 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:49:17,920 INFO L175 Difference]: Start difference. First operand has 1137 places, 2553 transitions, 137229 flow. Second operand 94 states and 2059 transitions. [2023-11-28 20:49:17,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1226 places, 2892 transitions, 154906 flow [2023-11-28 20:50:00,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1189 places, 2892 transitions, 154004 flow, removed 303 selfloop flow, removed 37 redundant places. [2023-11-28 20:50:00,216 INFO L231 Difference]: Finished difference. Result has 1212 places, 2697 transitions, 151442 flow [2023-11-28 20:50:00,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=136393, PETRI_DIFFERENCE_MINUEND_PLACES=1096, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=855, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=151442, PETRI_PLACES=1212, PETRI_TRANSITIONS=2697} [2023-11-28 20:50:00,218 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1174 predicate places. [2023-11-28 20:50:00,218 INFO L495 AbstractCegarLoop]: Abstraction has has 1212 places, 2697 transitions, 151442 flow [2023-11-28 20:50:00,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.705882352941178) internal successors, (636), 34 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:50:00,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:50:00,219 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] [2023-11-28 20:50:00,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-28 20:50:00,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-28 20:50:00,419 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:50:00,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:50:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash -522468009, now seen corresponding path program 29 times [2023-11-28 20:50:00,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:50:00,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30162858] [2023-11-28 20:50:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:50:00,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:50:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:50:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:50:00,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:50:00,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30162858] [2023-11-28 20:50:00,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30162858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:50:00,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147254885] [2023-11-28 20:50:00,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:50:00,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:50:00,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:50:00,656 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:50:00,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-28 20:50:00,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-28 20:50:00,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:50:00,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:50:00,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:50:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:50:01,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:50:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:50:01,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147254885] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:50:01,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:50:01,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2023-11-28 20:50:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763257723] [2023-11-28 20:50:01,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:50:01,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-28 20:50:01,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:50:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-28 20:50:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 20:50:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:50:01,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1212 places, 2697 transitions, 151442 flow. Second operand has 36 states, 36 states have (on average 18.583333333333332) internal successors, (669), 36 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:50:01,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:50:01,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:50:01,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:50:29,937 INFO L124 PetriNetUnfolderBase]: 6363/12422 cut-off events. [2023-11-28 20:50:29,937 INFO L125 PetriNetUnfolderBase]: For 1589351/1589396 co-relation queries the response was YES. [2023-11-28 20:50:30,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264117 conditions, 12422 events. 6363/12422 cut-off events. For 1589351/1589396 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 106662 event pairs, 103 based on Foata normal form. 41/12463 useless extension candidates. Maximal degree in co-relation 263770. Up to 2871 conditions per place. [2023-11-28 20:50:30,401 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 1135 selfloop transitions, 2385 changer transitions 78/3604 dead transitions. [2023-11-28 20:50:30,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1302 places, 3604 transitions, 206028 flow [2023-11-28 20:50:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-28 20:50:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-11-28 20:50:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 2111 transitions. [2023-11-28 20:50:30,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604524627720504 [2023-11-28 20:50:30,404 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 2111 transitions. [2023-11-28 20:50:30,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 2111 transitions. [2023-11-28 20:50:30,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:50:30,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 2111 transitions. [2023-11-28 20:50:30,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 21.762886597938145) internal successors, (2111), 97 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:50:30,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 36.0) internal successors, (3528), 98 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:50:30,411 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 36.0) internal successors, (3528), 98 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:50:30,411 INFO L175 Difference]: Start difference. First operand has 1212 places, 2697 transitions, 151442 flow. Second operand 97 states and 2111 transitions. [2023-11-28 20:50:30,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1302 places, 3604 transitions, 206028 flow [2023-11-28 20:51:34,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1247 places, 3604 transitions, 204635 flow, removed 389 selfloop flow, removed 55 redundant places. [2023-11-28 20:51:34,748 INFO L231 Difference]: Finished difference. Result has 1283 places, 3255 transitions, 193502 flow [2023-11-28 20:51:34,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=150109, PETRI_DIFFERENCE_MINUEND_PLACES=1151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1855, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=193502, PETRI_PLACES=1283, PETRI_TRANSITIONS=3255} [2023-11-28 20:51:34,751 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1245 predicate places. [2023-11-28 20:51:34,751 INFO L495 AbstractCegarLoop]: Abstraction has has 1283 places, 3255 transitions, 193502 flow [2023-11-28 20:51:34,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 18.583333333333332) internal successors, (669), 36 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:51:34,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:51:34,752 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] [2023-11-28 20:51:34,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-28 20:51:34,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-28 20:51:34,952 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:51:34,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:51:34,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1533450225, now seen corresponding path program 30 times [2023-11-28 20:51:34,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:51:34,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176234054] [2023-11-28 20:51:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:51:34,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:51:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:51:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:51:35,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:51:35,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176234054] [2023-11-28 20:51:35,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176234054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:51:35,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132441645] [2023-11-28 20:51:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:51:35,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:51:35,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:51:35,174 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:51:35,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-28 20:51:35,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:51:35,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:51:35,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:51:35,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:51:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:51:35,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:51:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:51:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132441645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:51:36,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:51:36,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:51:36,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477765410] [2023-11-28 20:51:36,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:51:36,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:51:36,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:51:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:51:36,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:51:36,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:51:36,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1283 places, 3255 transitions, 193502 flow. Second operand has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:51:36,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:51:36,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:51:36,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:52:08,207 INFO L124 PetriNetUnfolderBase]: 6235/12173 cut-off events. [2023-11-28 20:52:08,207 INFO L125 PetriNetUnfolderBase]: For 1610237/1610293 co-relation queries the response was YES. [2023-11-28 20:52:08,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267131 conditions, 12173 events. 6235/12173 cut-off events. For 1610237/1610293 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 104034 event pairs, 172 based on Foata normal form. 25/12198 useless extension candidates. Maximal degree in co-relation 266752. Up to 6185 conditions per place. [2023-11-28 20:52:08,675 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 1260 selfloop transitions, 2111 changer transitions 21/3398 dead transitions. [2023-11-28 20:52:08,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1338 places, 3398 transitions, 203222 flow [2023-11-28 20:52:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-28 20:52:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-28 20:52:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 1329 transitions. [2023-11-28 20:52:08,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605191256830601 [2023-11-28 20:52:08,677 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 1329 transitions. [2023-11-28 20:52:08,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 1329 transitions. [2023-11-28 20:52:08,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:52:08,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 1329 transitions. [2023-11-28 20:52:08,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 21.78688524590164) internal successors, (1329), 61 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:52:08,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 36.0) internal successors, (2232), 62 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:52:08,680 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 36.0) internal successors, (2232), 62 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:52:08,680 INFO L175 Difference]: Start difference. First operand has 1283 places, 3255 transitions, 193502 flow. Second operand 61 states and 1329 transitions. [2023-11-28 20:52:08,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1338 places, 3398 transitions, 203222 flow [2023-11-28 20:53:17,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1296 places, 3398 transitions, 199463 flow, removed 1513 selfloop flow, removed 42 redundant places. [2023-11-28 20:53:17,390 INFO L231 Difference]: Finished difference. Result has 1306 places, 3274 transitions, 198696 flow [2023-11-28 20:53:17,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=189940, PETRI_DIFFERENCE_MINUEND_PLACES=1236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2089, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=198696, PETRI_PLACES=1306, PETRI_TRANSITIONS=3274} [2023-11-28 20:53:17,393 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1268 predicate places. [2023-11-28 20:53:17,393 INFO L495 AbstractCegarLoop]: Abstraction has has 1306 places, 3274 transitions, 198696 flow [2023-11-28 20:53:17,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:17,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:53:17,393 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] [2023-11-28 20:53:17,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-28 20:53:17,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:53:17,593 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:53:17,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:53:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash 991200479, now seen corresponding path program 31 times [2023-11-28 20:53:17,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:53:17,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586586906] [2023-11-28 20:53:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:53:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:53:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:53:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:53:17,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:53:17,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586586906] [2023-11-28 20:53:17,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586586906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:53:17,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864950877] [2023-11-28 20:53:17,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:53:17,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:53:17,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:53:17,785 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:53:17,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-28 20:53:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:53:17,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:53:17,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:53:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:53:18,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:53:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:53:18,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864950877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:53:18,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:53:18,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:53:18,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411173936] [2023-11-28 20:53:18,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:53:18,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:53:18,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:53:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:53:18,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:53:18,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:53:18,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1306 places, 3274 transitions, 198696 flow. Second operand has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:18,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:53:18,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:53:18,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:53:50,626 INFO L124 PetriNetUnfolderBase]: 6232/12114 cut-off events. [2023-11-28 20:53:50,626 INFO L125 PetriNetUnfolderBase]: For 1585888/1585942 co-relation queries the response was YES. [2023-11-28 20:53:50,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267981 conditions, 12114 events. 6232/12114 cut-off events. For 1585888/1585942 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 103036 event pairs, 183 based on Foata normal form. 22/12136 useless extension candidates. Maximal degree in co-relation 267650. Up to 6633 conditions per place. [2023-11-28 20:53:51,072 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 1307 selfloop transitions, 2051 changer transitions 13/3377 dead transitions. [2023-11-28 20:53:51,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1346 places, 3377 transitions, 207121 flow [2023-11-28 20:53:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-28 20:53:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-28 20:53:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 972 transitions. [2023-11-28 20:53:51,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2023-11-28 20:53:51,074 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 972 transitions. [2023-11-28 20:53:51,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 972 transitions. [2023-11-28 20:53:51,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:53:51,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 972 transitions. [2023-11-28 20:53:51,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 22.09090909090909) internal successors, (972), 44 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:51,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 36.0) internal successors, (1620), 45 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:51,076 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 36.0) internal successors, (1620), 45 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:51,076 INFO L175 Difference]: Start difference. First operand has 1306 places, 3274 transitions, 198696 flow. Second operand 44 states and 972 transitions. [2023-11-28 20:53:51,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1346 places, 3377 transitions, 207121 flow [2023-11-28 20:55:00,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1305 places, 3377 transitions, 206534 flow, removed 49 selfloop flow, removed 41 redundant places. [2023-11-28 20:55:00,343 INFO L231 Difference]: Finished difference. Result has 1311 places, 3279 transitions, 205529 flow [2023-11-28 20:55:00,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=198116, PETRI_DIFFERENCE_MINUEND_PLACES=1262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2045, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=205529, PETRI_PLACES=1311, PETRI_TRANSITIONS=3279} [2023-11-28 20:55:00,345 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1273 predicate places. [2023-11-28 20:55:00,345 INFO L495 AbstractCegarLoop]: Abstraction has has 1311 places, 3279 transitions, 205529 flow [2023-11-28 20:55:00,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:00,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:55:00,346 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] [2023-11-28 20:55:00,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-28 20:55:00,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-28 20:55:00,546 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-28 20:55:00,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:55:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash 995594647, now seen corresponding path program 32 times [2023-11-28 20:55:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:55:00,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129523437] [2023-11-28 20:55:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:55:00,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:55:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:55:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:55:00,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:55:00,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129523437] [2023-11-28 20:55:00,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129523437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:55:00,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53048506] [2023-11-28 20:55:00,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:55:00,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:55:00,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:55:00,749 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:55:00,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d932784-c951-48cd-8481-98376aa6c2b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-28 20:55:00,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:55:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:55:00,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:55:00,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:55:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:55:01,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:55:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:55:01,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53048506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:55:01,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:55:01,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-28 20:55:01,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370000361] [2023-11-28 20:55:01,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:55:01,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 20:55:01,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:55:01,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 20:55:01,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:55:01,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-28 20:55:01,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1311 places, 3279 transitions, 205529 flow. Second operand has 34 states, 34 states have (on average 18.676470588235293) internal successors, (635), 34 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:01,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:55:01,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-28 20:55:01,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:55:34,247 INFO L124 PetriNetUnfolderBase]: 6238/12122 cut-off events. [2023-11-28 20:55:34,247 INFO L125 PetriNetUnfolderBase]: For 1733273/1733335 co-relation queries the response was YES. [2023-11-28 20:55:34,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276020 conditions, 12122 events. 6238/12122 cut-off events. For 1733273/1733335 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 102973 event pairs, 155 based on Foata normal form. 23/12145 useless extension candidates. Maximal degree in co-relation 275691. Up to 5155 conditions per place. [2023-11-28 20:55:34,708 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 1090 selfloop transitions, 2333 changer transitions 25/3454 dead transitions. [2023-11-28 20:55:34,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1392 places, 3454 transitions, 215532 flow [2023-11-28 20:55:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-28 20:55:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-11-28 20:55:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 1841 transitions. [2023-11-28 20:55:34,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016339869281045 [2023-11-28 20:55:34,710 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 1841 transitions. [2023-11-28 20:55:34,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 1841 transitions. [2023-11-28 20:55:34,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:55:34,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 1841 transitions. [2023-11-28 20:55:34,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 21.658823529411766) internal successors, (1841), 85 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:34,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 36.0) internal successors, (3096), 86 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:34,715 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 36.0) internal successors, (3096), 86 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:34,715 INFO L175 Difference]: Start difference. First operand has 1311 places, 3279 transitions, 205529 flow. Second operand 85 states and 1841 transitions. [2023-11-28 20:55:34,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1392 places, 3454 transitions, 215532 flow